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* poll.cc (poll): Peek sockets ready for read to see if there's

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actually data.
This commit is contained in:
Corinna Vinschen 2002-08-29 09:41:00 +00:00
parent edb983c141
commit 7382e593a0
2 changed files with 28 additions and 1 deletions
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6
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,9 @@
2002-08-29 Boris Schaeling <boriss@web.de>
Corinna Vinschen <corinna@vinschen.de>
* poll.cc (poll): Peek sockets ready for read to see if there's
actually data.
2002-08-28 Christopher Faylor <cgf@redhat.com>
* cygthread.cc (hthreads): Remove unneeded global.

23
winsup/cygwin/poll.cc
View File

@ -11,6 +11,7 @@
#include "winsup.h"
#include <sys/time.h>
#include <sys/poll.h>
#include <sys/socket.h>
#include <errno.h>
#include <stdlib.h>
#include "security.h"
@ -85,7 +86,27 @@ poll (struct pollfd *fds, unsigned int nfds, int timeout)
else
{
if (FD_ISSET(fds[i].fd, read_fds))
fds[i].revents |= POLLIN;
{
char peek[1];
fhandler_socket *sock =
cygheap->fdtab[fds[i].fd]->is_socket ();
if (!sock)
fds[i].revents |= POLLIN;
else
switch (sock->recvfrom (peek, sizeof(peek), MSG_PEEK,
NULL, NULL))
{
case -1: /* Something weird happened */
fds[i].revents |= POLLERR;
break;
case 0: /* Closed on the read side. */
fds[i].revents |= POLLHUP;
break;
default:
fds[i].revents |= POLLIN;
break;
}
}
if (FD_ISSET(fds[i].fd, write_fds))
fds[i].revents |= POLLOUT;
if (FD_ISSET(fds[i].fd, except_fds))