2157 lines
51 KiB
C++
2157 lines
51 KiB
C++
/* select.cc
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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/* The following line means that the BSD socket definitions for
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fd_set, FD_ISSET etc. are used in this file. */
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#define __INSIDE_CYGWIN_NET__
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#include "winsup.h"
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#include <stdlib.h>
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#include <sys/param.h>
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#include "ntdll.h"
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#define USE_SYS_TYPES_FD_SET
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#include <winsock2.h>
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#include <netdb.h>
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#include "cygerrno.h"
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#include "security.h"
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#include "path.h"
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#include "fhandler.h"
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#include "select.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "pinfo.h"
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#include "sigproc.h"
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#include "cygtls.h"
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/*
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* All these defines below should be in sys/types.h
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* but because of the includes above, they may not have
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* been included. We create special UNIX_xxxx versions here.
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*/
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#ifndef NBBY
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#define NBBY 8 /* number of bits in a byte */
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#endif /* NBBY */
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/*
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* Select uses bit masks of file descriptors in longs.
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* These macros manipulate such bit fields (the filesystem macros use chars).
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* FD_SETSIZE may be defined by the user, but the default here
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* should be >= NOFILE (param.h).
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*/
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#define UNIX_NFDBITS (sizeof (fd_mask) * NBBY) /* bits per mask */
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#ifndef unix_howmany
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#define unix_howmany(x,y) (((x)+((y)-1))/(y))
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#endif
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#define unix_fd_set fd_set
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#define NULL_fd_set ((fd_set *) NULL)
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#define sizeof_fd_set(n) \
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((size_t) (NULL_fd_set->fds_bits + unix_howmany ((n), UNIX_NFDBITS)))
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#define UNIX_FD_SET(n, p) \
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((p)->fds_bits[(n)/UNIX_NFDBITS] |= (1L << ((n) % UNIX_NFDBITS)))
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#define UNIX_FD_CLR(n, p) \
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((p)->fds_bits[(n)/UNIX_NFDBITS] &= ~(1L << ((n) % UNIX_NFDBITS)))
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#define UNIX_FD_ISSET(n, p) \
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((p)->fds_bits[(n)/UNIX_NFDBITS] & (1L << ((n) % UNIX_NFDBITS)))
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#define UNIX_FD_ZERO(p, n) \
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memset ((caddr_t) (p), 0, sizeof_fd_set ((n)))
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#define allocfd_set(n) ({\
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size_t __sfds = sizeof_fd_set (n) + 8; \
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void *__res = alloca (__sfds); \
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memset (__res, 0, __sfds); \
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(fd_set *) __res; \
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})
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#define set_handle_or_return_if_not_open(h, s) \
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h = (s)->fh->get_handle_cyg (); \
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if (cygheap->fdtab.not_open ((s)->fd)) \
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{ \
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(s)->thread_errno = EBADF; \
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return -1; \
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}
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static int select (int, fd_set *, fd_set *, fd_set *, LONGLONG);
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/* The main select code. */
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extern "C" int
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pselect (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
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const struct timespec *to, const sigset_t *set)
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{
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sigset_t oldset = _my_tls.sigmask;
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__try
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{
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if (set)
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set_signal_mask (_my_tls.sigmask, *set);
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select_printf ("pselect (%d, %p, %p, %p, %p, %p)", maxfds, readfds, writefds, exceptfds, to, set);
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pthread_testcancel ();
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int res;
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if (maxfds < 0)
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{
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set_errno (EINVAL);
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res = -1;
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}
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else
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{
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/* Convert to microseconds or -1 if to == NULL */
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LONGLONG us = to ? to->tv_sec * USPERSEC
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+ (to->tv_nsec + (NSPERSEC/USPERSEC) - 1)
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/ (NSPERSEC/USPERSEC)
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: -1LL;
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if (to)
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select_printf ("to->tv_sec %ld, to->tv_nsec %ld, us %D", to->tv_sec, to->tv_nsec, us);
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else
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select_printf ("to NULL, us %D", us);
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res = select (maxfds, readfds ?: allocfd_set (maxfds),
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writefds ?: allocfd_set (maxfds),
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exceptfds ?: allocfd_set (maxfds), us);
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}
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syscall_printf ("%R = select (%d, %p, %p, %p, %p)", res, maxfds, readfds,
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writefds, exceptfds, to);
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if (set)
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set_signal_mask (_my_tls.sigmask, oldset);
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return res;
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}
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__except (EFAULT) {}
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__endtry
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return -1;
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}
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/* select () is just a wrapper on pselect (). */
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extern "C" int
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cygwin_select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
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struct timeval *to)
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{
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struct timespec ts;
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if (to)
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{
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ts.tv_sec = to->tv_sec;
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ts.tv_nsec = to->tv_usec * 1000;
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}
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return pselect (maxfds, readfds, writefds, exceptfds,
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to ? &ts : NULL, NULL);
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}
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/* This function is arbitrarily split out from cygwin_select to avoid odd
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gcc issues with the use of allocfd_set and improper constructor handling
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for the sel variable. */
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static int
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select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
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LONGLONG us)
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{
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select_stuff::wait_states wait_state = select_stuff::select_set_zero;
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int ret = 0;
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/* Record the current time for later use. */
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LONGLONG start_time = get_clock (CLOCK_REALTIME)->usecs ();
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select_stuff sel;
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sel.return_on_signal = 0;
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/* Allocate fd_set structures to store incoming fd sets. */
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fd_set *readfds_in = allocfd_set (maxfds);
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fd_set *writefds_in = allocfd_set (maxfds);
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fd_set *exceptfds_in = allocfd_set (maxfds);
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memcpy (readfds_in, readfds, sizeof_fd_set (maxfds));
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memcpy (writefds_in, writefds, sizeof_fd_set (maxfds));
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memcpy (exceptfds_in, exceptfds, sizeof_fd_set (maxfds));
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do
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{
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/* Build the select record per fd linked list and set state as
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needed. */
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for (int i = 0; i < maxfds; i++)
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if (!sel.test_and_set (i, readfds_in, writefds_in, exceptfds_in))
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{
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select_printf ("aborting due to test_and_set error");
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return -1; /* Invalid fd, maybe? */
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}
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select_printf ("sel.always_ready %d", sel.always_ready);
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if (sel.always_ready || us == 0)
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/* Catch any active fds via sel.poll () below */
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wait_state = select_stuff::select_ok;
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else
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/* wait for an fd to become active or time out */
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wait_state = sel.wait (readfds, writefds, exceptfds, us);
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select_printf ("sel.wait returns %d", wait_state);
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if (wait_state == select_stuff::select_ok)
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{
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UNIX_FD_ZERO (readfds, maxfds);
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UNIX_FD_ZERO (writefds, maxfds);
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UNIX_FD_ZERO (exceptfds, maxfds);
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/* Set bit mask from sel records. This also sets ret to the
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right value >= 0, matching the number of bits set in the
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fds records. if ret is 0, continue to loop. */
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ret = sel.poll (readfds, writefds, exceptfds);
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if (ret < 0)
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wait_state = select_stuff::select_signalled;
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else if (!ret)
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wait_state = select_stuff::select_set_zero;
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}
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/* Always clean up everything here. If we're looping then build it
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all up again. */
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sel.cleanup ();
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sel.destroy ();
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/* Check and recalculate timeout. */
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if (us != -1LL && wait_state == select_stuff::select_set_zero)
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{
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select_printf ("recalculating us");
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LONGLONG now = get_clock (CLOCK_REALTIME)->usecs ();
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if (now >= (start_time + us))
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{
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select_printf ("timed out after verification");
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/* Set descriptor bits to zero per POSIX. */
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UNIX_FD_ZERO (readfds, maxfds);
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UNIX_FD_ZERO (writefds, maxfds);
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UNIX_FD_ZERO (exceptfds, maxfds);
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wait_state = select_stuff::select_ok;
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ret = 0;
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}
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else
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{
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us -= (now - start_time);
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start_time = now;
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select_printf ("us now %D", us);
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}
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}
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}
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while (wait_state == select_stuff::select_set_zero);
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if (wait_state < select_stuff::select_ok)
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ret = -1;
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return ret;
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}
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/* Call cleanup functions for all inspected fds. Gets rid of any
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executing threads. */
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void
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select_stuff::cleanup ()
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{
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select_record *s = &start;
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select_printf ("calling cleanup routines");
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while ((s = s->next))
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if (s->cleanup)
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{
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s->cleanup (s, this);
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s->cleanup = NULL;
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}
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}
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/* Destroy all storage associated with select stuff. */
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inline void
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select_stuff::destroy ()
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{
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select_record *s;
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select_record *snext = start.next;
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select_printf ("deleting select records");
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while ((s = snext))
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{
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snext = s->next;
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delete s;
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}
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start.next = NULL;
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}
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select_stuff::~select_stuff ()
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{
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cleanup ();
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destroy ();
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}
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#ifdef DEBUGGING
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void
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select_record::dump_select_record ()
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{
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select_printf ("fd %d, h %p, fh %p, thread_errno %d, windows_handle %p",
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fd, h, fh, thread_errno, windows_handle);
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select_printf ("read_ready %d, write_ready %d, except_ready %d",
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read_ready, write_ready, except_ready);
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select_printf ("read_selected %d, write_selected %d, except_selected %d, except_on_write %d",
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read_selected, write_selected, except_selected, except_on_write);
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select_printf ("startup %p, peek %p, verify %p cleanup %p, next %p",
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startup, peek, verify, cleanup, next);
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}
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#endif /*DEBUGGING*/
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/* Add a record to the select chain */
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bool
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select_stuff::test_and_set (int i, fd_set *readfds, fd_set *writefds,
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fd_set *exceptfds)
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{
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if (!UNIX_FD_ISSET (i, readfds) && !UNIX_FD_ISSET (i, writefds)
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&& ! UNIX_FD_ISSET (i, exceptfds))
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return true;
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select_record *s = new select_record;
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if (!s)
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return false;
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s->next = start.next;
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start.next = s;
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if (UNIX_FD_ISSET (i, readfds) && !cygheap->fdtab.select_read (i, this))
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goto err;
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if (UNIX_FD_ISSET (i, writefds) && !cygheap->fdtab.select_write (i, this))
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goto err;
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if (UNIX_FD_ISSET (i, exceptfds) && !cygheap->fdtab.select_except (i, this))
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goto err; /* error */
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if (s->read_ready || s->write_ready || s->except_ready)
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always_ready = true;
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if (s->windows_handle)
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windows_used = true;
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#ifdef DEBUGGING
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s->dump_select_record ();
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#endif
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return true;
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err:
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start.next = s->next;
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delete s;
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return false;
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}
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/* The heart of select. Waits for an fd to do something interesting. */
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select_stuff::wait_states
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select_stuff::wait (fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
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LONGLONG us)
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{
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HANDLE w4[MAXIMUM_WAIT_OBJECTS];
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select_record *s = &start;
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DWORD m = 0, timer_idx = 0, cancel_idx = 0;
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/* Always wait for signals. */
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wait_signal_arrived here (w4[m++]);
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/* Set a timeout, or not, for WMFO. */
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DWORD wmfo_timeout = us ? INFINITE : 0;
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/* Optionally wait for pthread cancellation. */
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if ((w4[m] = pthread::get_cancel_event ()) != NULL)
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cancel_idx = m++;
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/* Loop through the select chain, starting up anything appropriate and
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counting the number of active fds. */
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DWORD startfds = m;
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while ((s = s->next))
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{
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/* Make sure to leave space for the timer, if we have a finite timeout. */
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if (m >= MAXIMUM_WAIT_OBJECTS - (us > 0LL ? 1 : 0))
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{
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set_sig_errno (EINVAL);
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return select_error;
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}
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if (!s->startup (s, this))
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{
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s->set_select_errno ();
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return select_error;
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}
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if (s->h != NULL)
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{
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for (DWORD i = startfds; i < m; i++)
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if (w4[i] == s->h)
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goto next_while;
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w4[m++] = s->h;
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}
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next_while:;
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}
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/* Optionally create and set a waitable timer if a finite timeout has
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been requested. Recycle cw_timer in the cygtls area so we only have
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to create the timer once per thread. Since WFMO checks the handles
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in order, we append the timer as last object, otherwise it's preferred
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over actual events on the descriptors. */
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HANDLE &wait_timer = _my_tls.locals.cw_timer;
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if (us > 0LL)
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{
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NTSTATUS status;
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if (!wait_timer)
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{
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status = NtCreateTimer (&wait_timer, TIMER_ALL_ACCESS, NULL,
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NotificationTimer);
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if (!NT_SUCCESS (status))
|
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{
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select_printf ("%y = NtCreateTimer ()\n", status);
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return select_error;
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}
|
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}
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LARGE_INTEGER ms_clock_ticks = { .QuadPart = -us * 10 };
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status = NtSetTimer (wait_timer, &ms_clock_ticks, NULL, NULL, FALSE,
|
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0, NULL);
|
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if (!NT_SUCCESS (status))
|
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{
|
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select_printf ("%y = NtSetTimer (%D)\n",
|
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status, ms_clock_ticks.QuadPart);
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return select_error;
|
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}
|
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w4[m] = wait_timer;
|
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timer_idx = m++;
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}
|
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|
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debug_printf ("m %d, us %U, wmfo_timeout %d", m, us, wmfo_timeout);
|
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|
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DWORD wait_ret;
|
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if (!windows_used)
|
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wait_ret = WaitForMultipleObjects (m, w4, FALSE, wmfo_timeout);
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else
|
|
/* Using MWMO_INPUTAVAILABLE is the officially supported solution for
|
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the problem that the call to PeekMessage disarms the queue state
|
|
so that a subsequent MWFMO hangs, even if there are still messages
|
|
in the queue. */
|
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wait_ret = MsgWaitForMultipleObjectsEx (m, w4, wmfo_timeout,
|
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QS_ALLINPUT | QS_ALLPOSTMESSAGE,
|
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MWMO_INPUTAVAILABLE);
|
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select_printf ("wait_ret %d, m = %d. verifying", wait_ret, m);
|
|
|
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if (timer_idx)
|
|
{
|
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BOOLEAN current_state;
|
|
NtCancelTimer (wait_timer, ¤t_state);
|
|
}
|
|
|
|
wait_states res;
|
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switch (wait_ret)
|
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{
|
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case WAIT_OBJECT_0:
|
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select_printf ("signal received");
|
|
/* Need to get rid of everything when a signal occurs since we can't
|
|
be assured that a signal handler won't jump out of select entirely. */
|
|
cleanup ();
|
|
destroy ();
|
|
/* select() is always interrupted by a signal so set EINTR,
|
|
unconditionally, ignoring any SA_RESTART detection by
|
|
call_signal_handler(). */
|
|
_my_tls.call_signal_handler ();
|
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set_sig_errno (EINTR);
|
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res = select_signalled; /* Cause loop exit in cygwin_select */
|
|
break;
|
|
case WAIT_FAILED:
|
|
system_printf ("WaitForMultipleObjects failed, %E");
|
|
s = &start;
|
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s->set_select_errno ();
|
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res = select_error;
|
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break;
|
|
case WAIT_TIMEOUT:
|
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was_timeout:
|
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select_printf ("timed out");
|
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res = select_set_zero;
|
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break;
|
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case WAIT_OBJECT_0 + 1:
|
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/* Cancel event? */
|
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if (wait_ret == cancel_idx)
|
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{
|
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cleanup ();
|
|
destroy ();
|
|
pthread::static_cancel_self ();
|
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/*NOTREACHED*/
|
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}
|
|
/*FALLTHRU*/
|
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default:
|
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/* Timer event? */
|
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if (wait_ret == timer_idx)
|
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goto was_timeout;
|
|
|
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s = &start;
|
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res = select_set_zero;
|
|
/* Some types of objects (e.g., consoles) wake up on "inappropriate"
|
|
events like mouse movements. The verify function will detect these
|
|
situations. If it returns false, then this wakeup was a false alarm
|
|
and we should go back to waiting. */
|
|
int ret = 0;
|
|
while ((s = s->next))
|
|
if (s->saw_error ())
|
|
{
|
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set_errno (s->saw_error ());
|
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res = select_error; /* Somebody detected an error */
|
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goto out;
|
|
}
|
|
else if ((((wait_ret >= m && s->windows_handle)
|
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|| s->h == w4[wait_ret]))
|
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&& (ret = s->verify (s, readfds, writefds, exceptfds)) > 0)
|
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res = select_ok;
|
|
else if (ret < 0)
|
|
{
|
|
res = select_signalled;
|
|
goto out;
|
|
}
|
|
|
|
select_printf ("res after verify %d", res);
|
|
break;
|
|
}
|
|
out:
|
|
select_printf ("returning %d", res);
|
|
return res;
|
|
}
|
|
|
|
static int
|
|
set_bits (select_record *me, fd_set *readfds, fd_set *writefds,
|
|
fd_set *exceptfds)
|
|
{
|
|
int ready = 0;
|
|
fhandler_socket_wsock *sock;
|
|
select_printf ("me %p, testing fd %d (%s)", me, me->fd, me->fh->get_name ());
|
|
if (me->read_selected && me->read_ready)
|
|
{
|
|
UNIX_FD_SET (me->fd, readfds);
|
|
ready++;
|
|
}
|
|
if (me->write_selected && me->write_ready)
|
|
{
|
|
UNIX_FD_SET (me->fd, writefds);
|
|
if (me->except_on_write && (sock = me->fh->is_wsock_socket ()))
|
|
{
|
|
/* Set readfds entry in case of a failed connect. */
|
|
if (!me->read_ready && me->read_selected
|
|
&& sock->connect_state () == connect_failed)
|
|
UNIX_FD_SET (me->fd, readfds);
|
|
}
|
|
ready++;
|
|
}
|
|
if (me->except_selected && me->except_ready)
|
|
{
|
|
UNIX_FD_SET (me->fd, exceptfds);
|
|
ready++;
|
|
}
|
|
select_printf ("ready %d", ready);
|
|
return ready;
|
|
}
|
|
|
|
/* Poll every fd in the select chain. Set appropriate fd in mask. */
|
|
int
|
|
select_stuff::poll (fd_set *readfds, fd_set *writefds, fd_set *exceptfds)
|
|
{
|
|
int n = 0;
|
|
select_record *s = &start;
|
|
while ((s = s->next))
|
|
{
|
|
int ret = s->peek ? s->peek (s, true) : 1;
|
|
if (ret < 0)
|
|
return -1;
|
|
n += (ret > 0) ? set_bits (s, readfds, writefds, exceptfds) : 0;
|
|
}
|
|
return n;
|
|
}
|
|
|
|
static int
|
|
verify_true (select_record *, fd_set *, fd_set *, fd_set *)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
verify_ok (select_record *me, fd_set *readfds, fd_set *writefds,
|
|
fd_set *exceptfds)
|
|
{
|
|
return set_bits (me, readfds, writefds, exceptfds);
|
|
}
|
|
|
|
static int
|
|
no_startup (select_record *, select_stuff *)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
no_verify (select_record *, fd_set *, fd_set *, fd_set *)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
pipe_data_available (int fd, fhandler_base *fh, HANDLE h, bool writing)
|
|
{
|
|
IO_STATUS_BLOCK iosb = {{0}, 0};
|
|
FILE_PIPE_LOCAL_INFORMATION fpli = {0};
|
|
NTSTATUS status;
|
|
|
|
if (fh->has_ongoing_io ())
|
|
return 0;
|
|
|
|
status = NtQueryInformationFile (h, &iosb, &fpli, sizeof (fpli),
|
|
FilePipeLocalInformation);
|
|
if (!NT_SUCCESS (status))
|
|
{
|
|
/* If NtQueryInformationFile fails, optimistically assume the
|
|
pipe is writable. This could happen if we somehow
|
|
inherit a pipe that doesn't permit FILE_READ_ATTRIBUTES
|
|
access on the write end. */
|
|
select_printf ("fd %d, %s, NtQueryInformationFile failed, status %y",
|
|
fd, fh->get_name (), status);
|
|
return writing ? 1 : -1;
|
|
}
|
|
if (writing)
|
|
{
|
|
/* If there is anything available in the pipe buffer then signal
|
|
that. This means that a pipe could still block since you could
|
|
be trying to write more to the pipe than is available in the
|
|
buffer but that is the hazard of select(). */
|
|
fpli.WriteQuotaAvailable = fpli.OutboundQuota - fpli.ReadDataAvailable;
|
|
if (fpli.WriteQuotaAvailable > 0)
|
|
{
|
|
paranoid_printf ("fd %d, %s, write: size %u, avail %u", fd,
|
|
fh->get_name (), fpli.OutboundQuota,
|
|
fpli.WriteQuotaAvailable);
|
|
return 1;
|
|
}
|
|
/* If we somehow inherit a tiny pipe (size < PIPE_BUF), then consider
|
|
the pipe writable only if it is completely empty, to minimize the
|
|
probability that a subsequent write will block. */
|
|
if (fpli.OutboundQuota < PIPE_BUF
|
|
&& fpli.WriteQuotaAvailable == fpli.OutboundQuota)
|
|
{
|
|
select_printf ("fd, %s, write tiny pipe: size %u, avail %u",
|
|
fd, fh->get_name (), fpli.OutboundQuota,
|
|
fpli.WriteQuotaAvailable);
|
|
return 1;
|
|
}
|
|
}
|
|
else if (fpli.ReadDataAvailable)
|
|
{
|
|
paranoid_printf ("fd %d, %s, read avail %u", fd, fh->get_name (),
|
|
fpli.ReadDataAvailable);
|
|
return 1;
|
|
}
|
|
if (fpli.NamedPipeState & FILE_PIPE_CLOSING_STATE)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
peek_pipe (select_record *s, bool from_select)
|
|
{
|
|
HANDLE h;
|
|
set_handle_or_return_if_not_open (h, s);
|
|
|
|
int gotone = 0;
|
|
fhandler_base *fh = (fhandler_base *) s->fh;
|
|
|
|
DWORD dev = fh->get_device ();
|
|
if (s->read_selected && dev != FH_PIPEW)
|
|
{
|
|
if (s->read_ready)
|
|
{
|
|
select_printf ("%s, already ready for read", fh->get_name ());
|
|
gotone = 1;
|
|
goto out;
|
|
}
|
|
|
|
switch (fh->get_major ())
|
|
{
|
|
case DEV_PTYM_MAJOR:
|
|
{
|
|
fhandler_pty_master *fhm = (fhandler_pty_master *) fh;
|
|
fhm->flush_to_slave ();
|
|
}
|
|
break;
|
|
default:
|
|
if (fh->get_readahead_valid ())
|
|
{
|
|
select_printf ("readahead");
|
|
gotone = s->read_ready = true;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (fh->bg_check (SIGTTIN, true) <= bg_eof)
|
|
{
|
|
gotone = s->read_ready = true;
|
|
goto out;
|
|
}
|
|
int n = pipe_data_available (s->fd, fh, h, false);
|
|
/* On PTY masters, check if input from the echo pipe is available. */
|
|
if (n == 0 && fh->get_echo_handle ())
|
|
n = pipe_data_available (s->fd, fh, fh->get_echo_handle (), false);
|
|
|
|
if (n < 0)
|
|
{
|
|
select_printf ("read: %s, n %d", fh->get_name (), n);
|
|
if (s->except_selected)
|
|
gotone += s->except_ready = true;
|
|
if (s->read_selected)
|
|
gotone += s->read_ready = true;
|
|
}
|
|
else if (n > 0)
|
|
{
|
|
select_printf ("read: %s, ready for read: avail %d", fh->get_name (), n);
|
|
gotone += s->read_ready = true;
|
|
}
|
|
if (!gotone && s->fh->hit_eof ())
|
|
{
|
|
select_printf ("read: %s, saw EOF", fh->get_name ());
|
|
if (s->except_selected)
|
|
gotone += s->except_ready = true;
|
|
if (s->read_selected)
|
|
gotone += s->read_ready = true;
|
|
}
|
|
}
|
|
|
|
out:
|
|
h = fh->get_output_handle_cyg ();
|
|
if (s->write_selected && dev != FH_PIPER)
|
|
{
|
|
gotone += s->write_ready = pipe_data_available (s->fd, fh, h, true);
|
|
select_printf ("write: %s, gotone %d", fh->get_name (), gotone);
|
|
}
|
|
return gotone;
|
|
}
|
|
|
|
static int start_thread_pipe (select_record *me, select_stuff *stuff);
|
|
|
|
static DWORD WINAPI
|
|
thread_pipe (void *arg)
|
|
{
|
|
select_pipe_info *pi = (select_pipe_info *) arg;
|
|
DWORD sleep_time = 0;
|
|
bool looping = true;
|
|
|
|
while (looping)
|
|
{
|
|
for (select_record *s = pi->start; (s = s->next); )
|
|
if (s->startup == start_thread_pipe)
|
|
{
|
|
if (peek_pipe (s, true))
|
|
looping = false;
|
|
if (pi->stop_thread)
|
|
{
|
|
select_printf ("stopping");
|
|
looping = false;
|
|
break;
|
|
}
|
|
}
|
|
if (!looping)
|
|
break;
|
|
cygwait (pi->bye, sleep_time >> 3);
|
|
if (sleep_time < 80)
|
|
++sleep_time;
|
|
if (pi->stop_thread)
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
start_thread_pipe (select_record *me, select_stuff *stuff)
|
|
{
|
|
select_pipe_info *pi = stuff->device_specific_pipe;
|
|
if (pi->start)
|
|
me->h = *((select_pipe_info *) stuff->device_specific_pipe)->thread;
|
|
else
|
|
{
|
|
pi->start = &stuff->start;
|
|
pi->stop_thread = false;
|
|
pi->bye = CreateEvent (&sec_none_nih, TRUE, FALSE, NULL);
|
|
pi->thread = new cygthread (thread_pipe, pi, "pipesel");
|
|
me->h = *pi->thread;
|
|
if (!me->h)
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
pipe_cleanup (select_record *, select_stuff *stuff)
|
|
{
|
|
select_pipe_info *pi = (select_pipe_info *) stuff->device_specific_pipe;
|
|
if (!pi)
|
|
return;
|
|
if (pi->thread)
|
|
{
|
|
pi->stop_thread = true;
|
|
SetEvent (pi->bye);
|
|
pi->thread->detach ();
|
|
}
|
|
CloseHandle (pi->bye);
|
|
delete pi;
|
|
stuff->device_specific_pipe = NULL;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pipe::select_read (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pipe::select_write (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->write_selected = true;
|
|
s->write_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pipe::select_except (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
static int
|
|
peek_fifo (select_record *s, bool from_select)
|
|
{
|
|
if (cygheap->fdtab.not_open (s->fd))
|
|
{
|
|
s->thread_errno = EBADF;
|
|
return -1;
|
|
}
|
|
|
|
int gotone = 0;
|
|
fhandler_fifo *fh = (fhandler_fifo *) s->fh;
|
|
|
|
if (s->read_selected)
|
|
{
|
|
if (s->read_ready)
|
|
{
|
|
select_printf ("%s, already ready for read", fh->get_name ());
|
|
gotone = 1;
|
|
goto out;
|
|
}
|
|
|
|
if (fh->get_readahead_valid ())
|
|
{
|
|
select_printf ("readahead");
|
|
gotone = s->read_ready = true;
|
|
goto out;
|
|
}
|
|
|
|
if (fh->hit_eof ())
|
|
{
|
|
select_printf ("read: %s, saw EOF", fh->get_name ());
|
|
gotone = s->read_ready = true;
|
|
if (s->except_selected)
|
|
gotone += s->except_ready = true;
|
|
goto out;
|
|
}
|
|
|
|
fh->fifo_client_lock ();
|
|
for (int i = 0; i < fh->get_nhandlers (); i++)
|
|
if (fh->is_connected (i))
|
|
{
|
|
int n = pipe_data_available (s->fd, fh, fh->get_fc_handle (i),
|
|
false);
|
|
if (n > 0)
|
|
{
|
|
select_printf ("read: %s, ready for read: avail %d, client %d",
|
|
fh->get_name (), n, i);
|
|
fh->fifo_client_unlock ();
|
|
gotone += s->read_ready = true;
|
|
goto out;
|
|
}
|
|
}
|
|
fh->fifo_client_unlock ();
|
|
}
|
|
out:
|
|
if (s->write_selected)
|
|
{
|
|
gotone += s->write_ready
|
|
= pipe_data_available (s->fd, fh, fh->get_handle (), true);
|
|
select_printf ("write: %s, gotone %d", fh->get_name (), gotone);
|
|
}
|
|
return gotone;
|
|
}
|
|
|
|
static int start_thread_fifo (select_record *me, select_stuff *stuff);
|
|
|
|
static DWORD WINAPI
|
|
thread_fifo (void *arg)
|
|
{
|
|
select_fifo_info *pi = (select_fifo_info *) arg;
|
|
DWORD sleep_time = 0;
|
|
bool looping = true;
|
|
|
|
while (looping)
|
|
{
|
|
for (select_record *s = pi->start; (s = s->next); )
|
|
if (s->startup == start_thread_fifo)
|
|
{
|
|
if (peek_fifo (s, true))
|
|
looping = false;
|
|
if (pi->stop_thread)
|
|
{
|
|
select_printf ("stopping");
|
|
looping = false;
|
|
break;
|
|
}
|
|
}
|
|
if (!looping)
|
|
break;
|
|
cygwait (pi->bye, sleep_time >> 3);
|
|
if (sleep_time < 80)
|
|
++sleep_time;
|
|
if (pi->stop_thread)
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
start_thread_fifo (select_record *me, select_stuff *stuff)
|
|
{
|
|
select_fifo_info *pi = stuff->device_specific_fifo;
|
|
if (pi->start)
|
|
me->h = *((select_fifo_info *) stuff->device_specific_fifo)->thread;
|
|
else
|
|
{
|
|
pi->start = &stuff->start;
|
|
pi->stop_thread = false;
|
|
pi->bye = CreateEvent (&sec_none_nih, TRUE, FALSE, NULL);
|
|
pi->thread = new cygthread (thread_fifo, pi, "fifosel");
|
|
me->h = *pi->thread;
|
|
if (!me->h)
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
fifo_cleanup (select_record *, select_stuff *stuff)
|
|
{
|
|
select_fifo_info *pi = (select_fifo_info *) stuff->device_specific_fifo;
|
|
if (!pi)
|
|
return;
|
|
if (pi->thread)
|
|
{
|
|
pi->stop_thread = true;
|
|
SetEvent (pi->bye);
|
|
pi->thread->detach ();
|
|
}
|
|
CloseHandle (pi->bye);
|
|
delete pi;
|
|
stuff->device_specific_fifo = NULL;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_fifo::select_read (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_fifo
|
|
&& (ss->device_specific_fifo = new select_fifo_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_fifo;
|
|
s->peek = peek_fifo;
|
|
s->verify = verify_ok;
|
|
s->cleanup = fifo_cleanup;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_fifo::select_write (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_fifo
|
|
&& (ss->device_specific_fifo = new select_fifo_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_fifo;
|
|
s->peek = peek_fifo;
|
|
s->verify = verify_ok;
|
|
s->cleanup = fifo_cleanup;
|
|
s->write_selected = true;
|
|
s->write_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_fifo::select_except (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_fifo
|
|
&& (ss->device_specific_fifo = new select_fifo_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_fifo;
|
|
s->peek = peek_fifo;
|
|
s->verify = verify_ok;
|
|
s->cleanup = fifo_cleanup;
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
static int
|
|
peek_console (select_record *me, bool)
|
|
{
|
|
fhandler_console *fh = (fhandler_console *) me->fh;
|
|
|
|
if (!me->read_selected)
|
|
return me->write_ready;
|
|
|
|
if (fh->get_cons_readahead_valid ())
|
|
return me->read_ready = true;
|
|
|
|
if (fh->input_ready)
|
|
return me->read_ready = true;
|
|
|
|
if (me->read_ready)
|
|
{
|
|
select_printf ("already ready");
|
|
return 1;
|
|
}
|
|
|
|
INPUT_RECORD irec;
|
|
DWORD events_read;
|
|
HANDLE h;
|
|
set_handle_or_return_if_not_open (h, me);
|
|
|
|
while (!fh->input_ready && !fh->get_cons_readahead_valid ())
|
|
{
|
|
if (fh->bg_check (SIGTTIN, true) <= bg_eof)
|
|
return me->read_ready = true;
|
|
else if (!PeekConsoleInputW (h, &irec, 1, &events_read) || !events_read)
|
|
break;
|
|
fh->acquire_input_mutex (INFINITE);
|
|
if (fhandler_console::input_winch == fh->process_input_message ()
|
|
&& global_sigs[SIGWINCH].sa_handler != SIG_IGN
|
|
&& global_sigs[SIGWINCH].sa_handler != SIG_DFL)
|
|
{
|
|
set_sig_errno (EINTR);
|
|
fh->release_input_mutex ();
|
|
return -1;
|
|
}
|
|
fh->release_input_mutex ();
|
|
}
|
|
if (fh->input_ready || fh->get_cons_readahead_valid ())
|
|
return me->read_ready = true;
|
|
|
|
return me->write_ready;
|
|
}
|
|
|
|
static int
|
|
verify_console (select_record *me, fd_set *rfds, fd_set *wfds,
|
|
fd_set *efds)
|
|
{
|
|
return peek_console (me, true);
|
|
}
|
|
|
|
select_record *
|
|
fhandler_console::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_console;
|
|
set_cursor_maybe ();
|
|
}
|
|
|
|
s->peek = peek_console;
|
|
s->h = get_handle ();
|
|
s->read_selected = true;
|
|
s->read_ready = input_ready || get_cons_readahead_valid ();
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_console::select_write (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = no_verify;
|
|
set_cursor_maybe ();
|
|
}
|
|
|
|
s->peek = peek_console;
|
|
s->write_selected = true;
|
|
s->write_ready = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_console::select_except (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = no_verify;
|
|
set_cursor_maybe ();
|
|
}
|
|
|
|
s->peek = peek_console;
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pty_common::select_read (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pty_common::select_write (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->write_selected = true;
|
|
s->write_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pty_common::select_except (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
static int
|
|
verify_tty_slave (select_record *me, fd_set *readfds, fd_set *writefds,
|
|
fd_set *exceptfds)
|
|
{
|
|
fhandler_pty_slave *ptys = (fhandler_pty_slave *) me->fh;
|
|
if (me->read_selected && !ptys->to_be_read_from_pcon () &&
|
|
IsEventSignalled (ptys->input_available_event))
|
|
me->read_ready = true;
|
|
return set_bits (me, readfds, writefds, exceptfds);
|
|
}
|
|
|
|
static int
|
|
peek_pty_slave (select_record *s, bool from_select)
|
|
{
|
|
int gotone = 0;
|
|
fhandler_base *fh = (fhandler_base *) s->fh;
|
|
fhandler_pty_slave *ptys = (fhandler_pty_slave *) fh;
|
|
|
|
ptys->reset_switch_to_pcon ();
|
|
|
|
if (s->read_selected)
|
|
{
|
|
if (s->read_ready)
|
|
{
|
|
select_printf ("%s, already ready for read", fh->get_name ());
|
|
gotone = 1;
|
|
goto out;
|
|
}
|
|
|
|
if (fh->bg_check (SIGTTIN, true) <= bg_eof)
|
|
{
|
|
gotone = s->read_ready = true;
|
|
goto out;
|
|
}
|
|
|
|
if (IsEventSignalled (ptys->input_available_event))
|
|
{
|
|
gotone = s->read_ready = true;
|
|
goto out;
|
|
}
|
|
|
|
if (!gotone && s->fh->hit_eof ())
|
|
{
|
|
select_printf ("read: %s, saw EOF", fh->get_name ());
|
|
if (s->except_selected)
|
|
gotone += s->except_ready = true;
|
|
if (s->read_selected)
|
|
gotone += s->read_ready = true;
|
|
}
|
|
}
|
|
|
|
out:
|
|
HANDLE h = ptys->get_output_handle_cyg ();
|
|
if (s->write_selected)
|
|
{
|
|
gotone += s->write_ready = pipe_data_available (s->fd, fh, h, true);
|
|
select_printf ("write: %s, gotone %d", fh->get_name (), gotone);
|
|
}
|
|
return gotone;
|
|
}
|
|
|
|
static int pty_slave_startup (select_record *me, select_stuff *stuff);
|
|
|
|
static DWORD WINAPI
|
|
thread_pty_slave (void *arg)
|
|
{
|
|
select_pipe_info *pi = (select_pipe_info *) arg;
|
|
DWORD sleep_time = 0;
|
|
bool looping = true;
|
|
|
|
while (looping)
|
|
{
|
|
for (select_record *s = pi->start; (s = s->next); )
|
|
if (s->startup == pty_slave_startup)
|
|
{
|
|
if (peek_pty_slave (s, true))
|
|
looping = false;
|
|
if (pi->stop_thread)
|
|
{
|
|
select_printf ("stopping");
|
|
looping = false;
|
|
break;
|
|
}
|
|
}
|
|
if (!looping)
|
|
break;
|
|
cygwait (pi->bye, sleep_time >> 3);
|
|
if (sleep_time < 80)
|
|
++sleep_time;
|
|
if (pi->stop_thread)
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
pty_slave_startup (select_record *me, select_stuff *stuff)
|
|
{
|
|
fhandler_base *fh = (fhandler_base *) me->fh;
|
|
fhandler_pty_slave *ptys = (fhandler_pty_slave *) fh;
|
|
if (me->read_selected)
|
|
ptys->mask_switch_to_pcon_in (true);
|
|
|
|
select_pipe_info *pi = stuff->device_specific_ptys;
|
|
if (pi->start)
|
|
me->h = *((select_pipe_info *) stuff->device_specific_ptys)->thread;
|
|
else
|
|
{
|
|
pi->start = &stuff->start;
|
|
pi->stop_thread = false;
|
|
pi->bye = CreateEvent (&sec_none_nih, TRUE, FALSE, NULL);
|
|
pi->thread = new cygthread (thread_pty_slave, pi, "ptyssel");
|
|
me->h = *pi->thread;
|
|
if (!me->h)
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
pty_slave_cleanup (select_record *me, select_stuff *stuff)
|
|
{
|
|
fhandler_base *fh = (fhandler_base *) me->fh;
|
|
fhandler_pty_slave *ptys = (fhandler_pty_slave *) fh;
|
|
if (me->read_selected)
|
|
ptys->mask_switch_to_pcon_in (false);
|
|
|
|
select_pipe_info *pi = (select_pipe_info *) stuff->device_specific_ptys;
|
|
if (!pi)
|
|
return;
|
|
if (pi->thread)
|
|
{
|
|
pi->stop_thread = true;
|
|
SetEvent (pi->bye);
|
|
pi->thread->detach ();
|
|
}
|
|
CloseHandle (pi->bye);
|
|
delete pi;
|
|
stuff->device_specific_ptys = NULL;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pty_slave::select_read (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_ptys
|
|
&& (ss->device_specific_ptys = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = pty_slave_startup;
|
|
s->peek = peek_pty_slave;
|
|
s->verify = verify_tty_slave;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
s->cleanup = pty_slave_cleanup;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pty_slave::select_write (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_ptys
|
|
&& (ss->device_specific_ptys = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = pty_slave_startup;
|
|
s->peek = peek_pty_slave;
|
|
s->verify = verify_tty_slave;
|
|
s->write_selected = true;
|
|
s->write_ready = false;
|
|
s->cleanup = pty_slave_cleanup;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pty_slave::select_except (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_ptys
|
|
&& (ss->device_specific_ptys = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = pty_slave_startup;
|
|
s->peek = peek_pty_slave;
|
|
s->verify = verify_tty_slave;
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
s->cleanup = pty_slave_cleanup;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_dev_null::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = no_verify;
|
|
}
|
|
s->h = get_handle ();
|
|
s->read_selected = true;
|
|
s->read_ready = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_dev_null::select_write (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = no_verify;
|
|
}
|
|
s->h = get_handle ();
|
|
s->write_selected = true;
|
|
s->write_ready = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_dev_null::select_except (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = no_verify;
|
|
}
|
|
s->h = get_handle ();
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
static int start_thread_serial (select_record *me, select_stuff *stuff);
|
|
|
|
static int
|
|
peek_serial (select_record *s, bool)
|
|
{
|
|
COMSTAT st;
|
|
|
|
fhandler_serial *fh = (fhandler_serial *) s->fh;
|
|
|
|
if (fh->get_readahead_valid () || fh->overlapped_armed < 0)
|
|
return s->read_ready = true;
|
|
|
|
select_printf ("fh->overlapped_armed %d", fh->overlapped_armed);
|
|
|
|
HANDLE h;
|
|
set_handle_or_return_if_not_open (h, s);
|
|
int ready = 0;
|
|
|
|
if ((s->read_selected && s->read_ready) || (s->write_selected && s->write_ready))
|
|
{
|
|
select_printf ("already ready");
|
|
ready = 1;
|
|
goto out;
|
|
}
|
|
|
|
/* This is apparently necessary for the com0com driver.
|
|
See: http://cygwin.com/ml/cygwin/2009-01/msg00667.html */
|
|
SetCommMask (h, 0);
|
|
|
|
SetCommMask (h, EV_RXCHAR);
|
|
|
|
if (!fh->overlapped_armed)
|
|
{
|
|
COMSTAT st;
|
|
|
|
ResetEvent (fh->io_status.hEvent);
|
|
|
|
if (!ClearCommError (h, &fh->ev, &st))
|
|
{
|
|
debug_printf ("ClearCommError");
|
|
goto err;
|
|
}
|
|
else if (st.cbInQue)
|
|
return s->read_ready = true;
|
|
else if (WaitCommEvent (h, &fh->ev, &fh->io_status))
|
|
return s->read_ready = true;
|
|
else if (GetLastError () == ERROR_IO_PENDING)
|
|
fh->overlapped_armed = 1;
|
|
else
|
|
{
|
|
debug_printf ("WaitCommEvent");
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
switch (WaitForSingleObject (fh->io_status.hEvent, 10L))
|
|
{
|
|
case WAIT_OBJECT_0:
|
|
if (!ClearCommError (h, &fh->ev, &st))
|
|
{
|
|
debug_printf ("ClearCommError");
|
|
goto err;
|
|
}
|
|
else if (!st.cbInQue)
|
|
Sleep (10L);
|
|
else
|
|
{
|
|
return s->read_ready = true;
|
|
select_printf ("got something");
|
|
}
|
|
break;
|
|
case WAIT_TIMEOUT:
|
|
break;
|
|
default:
|
|
debug_printf ("WaitForMultipleObjects");
|
|
goto err;
|
|
}
|
|
|
|
out:
|
|
return ready;
|
|
|
|
err:
|
|
if (GetLastError () == ERROR_OPERATION_ABORTED)
|
|
{
|
|
select_printf ("operation aborted");
|
|
return ready;
|
|
}
|
|
|
|
s->set_select_errno ();
|
|
select_printf ("error %E");
|
|
return -1;
|
|
}
|
|
|
|
static DWORD WINAPI
|
|
thread_serial (void *arg)
|
|
{
|
|
select_serial_info *si = (select_serial_info *) arg;
|
|
bool looping = true;
|
|
|
|
while (looping)
|
|
for (select_record *s = si->start; (s = s->next); )
|
|
if (s->startup != start_thread_serial)
|
|
continue;
|
|
else
|
|
{
|
|
if (peek_serial (s, true))
|
|
looping = false;
|
|
if (si->stop_thread)
|
|
{
|
|
select_printf ("stopping");
|
|
looping = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
select_printf ("exiting");
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
start_thread_serial (select_record *me, select_stuff *stuff)
|
|
{
|
|
if (stuff->device_specific_serial)
|
|
me->h = *((select_serial_info *) stuff->device_specific_serial)->thread;
|
|
else
|
|
{
|
|
select_serial_info *si = new select_serial_info;
|
|
si->start = &stuff->start;
|
|
si->stop_thread = false;
|
|
si->thread = new cygthread (thread_serial, si, "sersel");
|
|
me->h = *si->thread;
|
|
stuff->device_specific_serial = si;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
serial_cleanup (select_record *, select_stuff *stuff)
|
|
{
|
|
select_serial_info *si = (select_serial_info *) stuff->device_specific_serial;
|
|
if (!si)
|
|
return;
|
|
if (si->thread)
|
|
{
|
|
si->stop_thread = true;
|
|
si->thread->detach ();
|
|
}
|
|
delete si;
|
|
stuff->device_specific_serial = NULL;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_serial::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = start_thread_serial;
|
|
s->verify = verify_ok;
|
|
s->cleanup = serial_cleanup;
|
|
}
|
|
s->peek = peek_serial;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_serial::select_write (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->peek = peek_serial;
|
|
s->h = get_handle ();
|
|
s->write_selected = true;
|
|
s->write_ready = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_serial::select_except (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->h = NULL;
|
|
s->peek = peek_serial;
|
|
s->except_selected = false; // Can't do this
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_base::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->h = get_handle_cyg ();
|
|
s->read_selected = true;
|
|
s->read_ready = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_base::select_write (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->h = get_output_handle_cyg ();
|
|
s->write_selected = true;
|
|
s->write_ready = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_base::select_except (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->h = NULL;
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
static int
|
|
peek_socket (select_record *me, bool)
|
|
{
|
|
fhandler_socket_wsock *fh = (fhandler_socket_wsock *) me->fh;
|
|
long events;
|
|
/* Don't play with the settings again, unless having taken a deep look into
|
|
Richard W. Stevens Network Programming book. Thank you. */
|
|
long evt_mask = (me->read_selected ? (FD_READ | FD_ACCEPT | FD_CLOSE) : 0)
|
|
| (me->write_selected ? (FD_WRITE | FD_CONNECT | FD_CLOSE) : 0)
|
|
| (me->except_selected ? FD_OOB : 0);
|
|
int ret = fh->evaluate_events (evt_mask, events, false);
|
|
if (me->read_selected)
|
|
me->read_ready |= ret || !!(events & (FD_READ | FD_ACCEPT | FD_CLOSE));
|
|
if (me->write_selected)
|
|
me->write_ready |= ret || !!(events & (FD_WRITE | FD_CONNECT | FD_CLOSE));
|
|
if (me->except_selected)
|
|
me->except_ready |= !!(events & FD_OOB);
|
|
|
|
select_printf ("read_ready: %d, write_ready: %d, except_ready: %d",
|
|
me->read_ready, me->write_ready, me->except_ready);
|
|
return me->read_ready || me->write_ready || me->except_ready;
|
|
}
|
|
|
|
static int start_thread_socket (select_record *, select_stuff *);
|
|
|
|
static DWORD WINAPI
|
|
thread_socket (void *arg)
|
|
{
|
|
select_socket_info *si = (select_socket_info *) arg;
|
|
DWORD timeout = (si->num_w4 <= MAXIMUM_WAIT_OBJECTS)
|
|
? INFINITE
|
|
: (64 / (roundup2 (si->num_w4, MAXIMUM_WAIT_OBJECTS)
|
|
/ MAXIMUM_WAIT_OBJECTS));
|
|
bool event = false;
|
|
|
|
select_printf ("stuff_start %p, timeout %u", si->start, timeout);
|
|
while (!event)
|
|
{
|
|
for (select_record *s = si->start; (s = s->next); )
|
|
if (s->startup == start_thread_socket)
|
|
if (peek_socket (s, false))
|
|
event = true;
|
|
if (!event)
|
|
for (int i = 0; i < si->num_w4; i += MAXIMUM_WAIT_OBJECTS)
|
|
switch (WaitForMultipleObjects (MIN (si->num_w4 - i,
|
|
MAXIMUM_WAIT_OBJECTS),
|
|
si->w4 + i, FALSE, timeout))
|
|
{
|
|
case WAIT_FAILED:
|
|
goto out;
|
|
case WAIT_TIMEOUT:
|
|
continue;
|
|
case WAIT_OBJECT_0:
|
|
if (!i) /* Socket event set. */
|
|
goto out;
|
|
/*FALLTHRU*/
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
out:
|
|
select_printf ("leaving thread_socket");
|
|
return 0;
|
|
}
|
|
|
|
static inline bool init_tls_select_info () __attribute__ ((always_inline));
|
|
static inline bool
|
|
init_tls_select_info ()
|
|
{
|
|
if (!_my_tls.locals.select.sockevt)
|
|
{
|
|
_my_tls.locals.select.sockevt = CreateEvent (&sec_none_nih, TRUE, FALSE,
|
|
NULL);
|
|
if (!_my_tls.locals.select.sockevt)
|
|
return false;
|
|
}
|
|
if (!_my_tls.locals.select.ser_num)
|
|
{
|
|
_my_tls.locals.select.ser_num
|
|
= (LONG *) malloc (MAXIMUM_WAIT_OBJECTS * sizeof (LONG));
|
|
if (!_my_tls.locals.select.ser_num)
|
|
return false;
|
|
_my_tls.locals.select.w4
|
|
= (HANDLE *) malloc (MAXIMUM_WAIT_OBJECTS * sizeof (HANDLE));
|
|
if (!_my_tls.locals.select.w4)
|
|
{
|
|
free (_my_tls.locals.select.ser_num);
|
|
_my_tls.locals.select.ser_num = NULL;
|
|
return false;
|
|
}
|
|
_my_tls.locals.select.max_w4 = MAXIMUM_WAIT_OBJECTS;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static int
|
|
start_thread_socket (select_record *me, select_stuff *stuff)
|
|
{
|
|
select_socket_info *si;
|
|
|
|
if ((si = (select_socket_info *) stuff->device_specific_socket))
|
|
{
|
|
me->h = *si->thread;
|
|
return 1;
|
|
}
|
|
|
|
si = new select_socket_info;
|
|
|
|
if (!init_tls_select_info ())
|
|
{
|
|
delete si;
|
|
return 0;
|
|
}
|
|
|
|
si->ser_num = _my_tls.locals.select.ser_num;
|
|
si->w4 = _my_tls.locals.select.w4;
|
|
|
|
si->w4[0] = _my_tls.locals.select.sockevt;
|
|
si->num_w4 = 1;
|
|
|
|
select_record *s = &stuff->start;
|
|
while ((s = s->next))
|
|
if (s->startup == start_thread_socket)
|
|
{
|
|
/* No event/socket should show up multiple times. Every socket
|
|
is uniquely identified by its serial number in the global
|
|
wsock_events record. */
|
|
const LONG ser_num = ((fhandler_socket_wsock *) s->fh)->serial_number ();
|
|
for (int i = 1; i < si->num_w4; ++i)
|
|
if (si->ser_num[i] == ser_num)
|
|
goto continue_outer_loop;
|
|
if (si->num_w4 >= _my_tls.locals.select.max_w4)
|
|
{
|
|
LONG *nser = (LONG *) realloc (si->ser_num,
|
|
(_my_tls.locals.select.max_w4
|
|
+ MAXIMUM_WAIT_OBJECTS)
|
|
* sizeof (LONG));
|
|
if (!nser)
|
|
{
|
|
delete si;
|
|
return 0;
|
|
}
|
|
_my_tls.locals.select.ser_num = si->ser_num = nser;
|
|
HANDLE *nw4 = (HANDLE *) realloc (si->w4,
|
|
(_my_tls.locals.select.max_w4
|
|
+ MAXIMUM_WAIT_OBJECTS)
|
|
* sizeof (HANDLE));
|
|
if (!nw4)
|
|
{
|
|
delete si;
|
|
return 0;
|
|
}
|
|
_my_tls.locals.select.w4 = si->w4 = nw4;
|
|
_my_tls.locals.select.max_w4 += MAXIMUM_WAIT_OBJECTS;
|
|
}
|
|
si->ser_num[si->num_w4] = ser_num;
|
|
si->w4[si->num_w4++] = ((fhandler_socket_wsock *) s->fh)->wsock_event ();
|
|
continue_outer_loop:
|
|
;
|
|
}
|
|
stuff->device_specific_socket = si;
|
|
si->start = &stuff->start;
|
|
select_printf ("stuff_start %p", &stuff->start);
|
|
si->thread = new cygthread (thread_socket, si, "socksel");
|
|
me->h = *si->thread;
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
socket_cleanup (select_record *, select_stuff *stuff)
|
|
{
|
|
select_socket_info *si = (select_socket_info *) stuff->device_specific_socket;
|
|
select_printf ("si %p si->thread %p", si, si ? si->thread : NULL);
|
|
if (!si)
|
|
return;
|
|
if (si->thread)
|
|
{
|
|
SetEvent (si->w4[0]);
|
|
/* Wait for thread to go away */
|
|
si->thread->detach ();
|
|
ResetEvent (si->w4[0]);
|
|
}
|
|
delete si;
|
|
stuff->device_specific_socket = NULL;
|
|
select_printf ("returning");
|
|
}
|
|
|
|
select_record *
|
|
fhandler_socket_wsock::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = start_thread_socket;
|
|
s->verify = verify_true;
|
|
s->cleanup = socket_cleanup;
|
|
}
|
|
s->peek = peek_socket;
|
|
s->read_ready = saw_shutdown_read ();
|
|
s->read_selected = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_socket_wsock::select_write (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = start_thread_socket;
|
|
s->verify = verify_true;
|
|
s->cleanup = socket_cleanup;
|
|
}
|
|
s->peek = peek_socket;
|
|
s->write_ready = saw_shutdown_write () || connect_state () == unconnected;
|
|
s->write_selected = true;
|
|
if (connect_state () != unconnected)
|
|
{
|
|
s->except_ready = saw_shutdown_write () || saw_shutdown_read ();
|
|
s->except_on_write = true;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_socket_wsock::select_except (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = start_thread_socket;
|
|
s->verify = verify_true;
|
|
s->cleanup = socket_cleanup;
|
|
}
|
|
s->peek = peek_socket;
|
|
/* FIXME: Is this right? Should these be used as criteria for except? */
|
|
s->except_ready = saw_shutdown_write () || saw_shutdown_read ();
|
|
s->except_selected = true;
|
|
return s;
|
|
}
|
|
|
|
#ifdef __WITH_AF_UNIX
|
|
|
|
select_record *
|
|
fhandler_socket_unix::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->h = get_handle_cyg ();
|
|
s->read_selected = true;
|
|
s->read_ready = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_socket_unix::select_write (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->h = get_handle ();
|
|
s->write_selected = true;
|
|
s->write_ready = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_socket_unix::select_except (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->h = NULL;
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
#endif /* __WITH_AF_UNIX */
|
|
|
|
static int
|
|
peek_windows (select_record *me, bool)
|
|
{
|
|
MSG m;
|
|
HANDLE h;
|
|
set_handle_or_return_if_not_open (h, me);
|
|
/* We need the hWnd value, not the io_handle. */
|
|
h = ((fhandler_windows *) me->fh)->get_hwnd ();
|
|
|
|
if (me->read_selected && me->read_ready)
|
|
return 1;
|
|
|
|
if (PeekMessageW (&m, (HWND) h, 0, 0, PM_NOREMOVE))
|
|
{
|
|
me->read_ready = true;
|
|
select_printf ("window %d(%p) ready", me->fd, h);
|
|
return 1;
|
|
}
|
|
|
|
select_printf ("window %d(%p) not ready", me->fd, h);
|
|
return me->write_ready;
|
|
}
|
|
|
|
static int
|
|
verify_windows (select_record *me, fd_set *rfds, fd_set *wfds,
|
|
fd_set *efds)
|
|
{
|
|
return peek_windows (me, true);
|
|
}
|
|
|
|
select_record *
|
|
fhandler_windows::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
}
|
|
s->verify = verify_windows;
|
|
s->peek = peek_windows;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
s->windows_handle = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_windows::select_write (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->peek = peek_windows;
|
|
s->write_selected = true;
|
|
s->write_ready = true;
|
|
s->windows_handle = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_windows::select_except (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->peek = peek_windows;
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
s->windows_handle = true;
|
|
return s;
|
|
}
|
|
|
|
static int
|
|
peek_signalfd (select_record *me, bool)
|
|
{
|
|
if (((fhandler_signalfd *) me->fh)->poll () == 0)
|
|
{
|
|
select_printf ("signalfd %d ready", me->fd);
|
|
me->read_ready = true;
|
|
return 1;
|
|
}
|
|
select_printf ("signalfd %d not ready", me->fd);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
verify_signalfd (select_record *me, fd_set *rfds, fd_set *wfds, fd_set *efds)
|
|
{
|
|
return peek_signalfd (me, true);
|
|
}
|
|
|
|
extern HANDLE my_pendingsigs_evt;
|
|
|
|
select_record *
|
|
fhandler_signalfd::select_read (select_stuff *stuff)
|
|
{
|
|
select_record *s = stuff->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_signalfd;
|
|
}
|
|
s->peek = peek_signalfd;
|
|
s->h = my_pendingsigs_evt; /* wait_sig sets this if signal are pending */
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_signalfd::select_write (select_stuff *stuff)
|
|
{
|
|
select_record *s = stuff->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = no_verify;
|
|
}
|
|
s->peek = NULL;
|
|
s->write_selected = false;
|
|
s->write_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_signalfd::select_except (select_stuff *stuff)
|
|
{
|
|
select_record *s = stuff->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = no_verify;
|
|
}
|
|
s->peek = NULL;
|
|
s->except_selected = false;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
static int
|
|
peek_timerfd (select_record *me, bool)
|
|
{
|
|
if (WaitForSingleObject (me->h, 0) == WAIT_OBJECT_0)
|
|
{
|
|
select_printf ("timerfd %d ready", me->fd);
|
|
me->read_ready = true;
|
|
return 1;
|
|
}
|
|
select_printf ("timerfd %d not ready", me->fd);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
verify_timerfd (select_record *me, fd_set *rfds, fd_set *wfds,
|
|
fd_set *efds)
|
|
{
|
|
return peek_timerfd (me, true);
|
|
}
|
|
|
|
select_record *
|
|
fhandler_timerfd::select_read (select_stuff *stuff)
|
|
{
|
|
select_record *s = stuff->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_timerfd;
|
|
}
|
|
s->h = get_timerfd_handle ();
|
|
s->peek = peek_timerfd;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_timerfd::select_write (select_stuff *stuff)
|
|
{
|
|
select_record *s = stuff->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = no_verify;
|
|
}
|
|
s->peek = NULL;
|
|
s->write_selected = false;
|
|
s->write_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_timerfd::select_except (select_stuff *stuff)
|
|
{
|
|
select_record *s = stuff->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = no_verify;
|
|
}
|
|
s->peek = NULL;
|
|
s->except_selected = false;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|