newlib-cygwin/winsup/cygwin/sigproc.h

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/* sigproc.h
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Copyright 1997, 1998, 2000, 2001, 2002 Red Hat, Inc.
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This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifndef _SIGPROC_H
#define _SIGPROC_H
#include <signal.h>
#define EXIT_SIGNAL 0x010000
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#define EXIT_REPARENTING 0x020000
#define EXIT_NOCLOSEALL 0x040000
enum procstuff
{
PROC_ADDCHILD = 1, // add a new subprocess to list
PROC_CHILDTERMINATED = 2, // a child died
PROC_CLEARWAIT = 3, // clear all waits - signal arrived
PROC_WAIT = 4, // setup for wait() for subproc
PROC_NOTHING = 5 // nothing, really
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};
typedef struct struct_waitq
{
int pid;
int options;
int status;
HANDLE ev;
void *rusage; /* pointer to potential rusage */
struct struct_waitq *next;
HANDLE thread_ev;
} waitq;
struct sigthread
{
DWORD id;
DWORD frame;
CRITICAL_SECTION lock;
LONG winapi_lock;
BOOL exception;
bool get_winapi_lock (int test = 0);
void release_winapi_lock ();
void init (const char *s);
};
class sigframe
{
private:
sigthread *st;
inline bool unregister ()
{
if (!st)
return 0;
EnterCriticalSection (&st->lock);
st->frame = 0;
st->exception = 0;
st->release_winapi_lock ();
LeaveCriticalSection (&st->lock);
st = NULL;
return 1;
}
public:
inline void set (sigthread &t, DWORD ebp, bool is_exception = 0)
{
DWORD oframe = t.frame;
st = &t;
t.frame = ebp;
t.exception = is_exception;
if (!oframe)
t.get_winapi_lock ();
}
inline void init (sigthread &t, DWORD ebp = (DWORD) __builtin_frame_address (0))
{
if (!t.frame && t.id == GetCurrentThreadId ())
set (t, ebp);
else
st = NULL;
}
sigframe (): st (NULL) {}
sigframe (sigthread &t, DWORD ebp = (DWORD) __builtin_frame_address (0)) {init (t, ebp);}
~sigframe ()
{
unregister ();
}
int call_signal_handler ();
};
extern sigthread mainthread;
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extern HANDLE signal_arrived;
extern HANDLE sigCONT;
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BOOL __stdcall my_parent_is_alive ();
extern "C" int __stdcall sig_dispatch_pending ();
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extern "C" void __stdcall set_process_mask (sigset_t newmask);
extern "C" void __stdcall reset_signal_arrived ();
int __stdcall sig_handle (int) __attribute__ ((regparm (1)));
void __stdcall sig_clear (int) __attribute__ ((regparm (1)));
void __stdcall sig_set_pending (int) __attribute__ ((regparm (1)));
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int __stdcall handle_sigsuspend (sigset_t);
int __stdcall proc_subproc (DWORD, DWORD) __attribute__ ((regparm (2)));
* include/cygwin/version.h: Bump DLL minor version number to 5 due to all of the changes below. Redefine process structure to avoid a fixed size table. Redefine pinfo/_pinfo classes. Use these throughout. * dcrt0.cc (dll_crt0_1): Accomodate set_myself argument change. (__api_fatal): Accomodate _pinfo::record_death argument change. * exceptions.cc (really_exit): Ditto. (sig_handle_tty_stop): Use pinfo constructor to access process info. (events_init): Don't create pinfo_mutex since it is no longer required. * external.cc (fillout_pinfo): Use winpids class to iterate over all system pids. (cygwin_internal): lock_pinfo_for_update and unlock_pinfo are now noops. * fhandler_termios.cc (fhandler_termios::set_ctty): Use pinfo constructor to access process info. * fork.cc (fork): Reorganize to initialize child info after the child has started since that is when we know the child's winpid, which is necessary to allocate the pinfo shared memory. * mmap.cc (recreate_mmaps_after_fork): Change arg type to _pinfo. * pinfo.cc: Rename pinfo methods to _pinfo throughout. Eliminate pinfo_list stuff. (set_myself): Accept a pid argument now. Call pinfo initializer to initialize myself. Detect when this is an "execed" process and create an "indirect" pid block. (pinfo_init): Accomodate set_myself arg change. (procinfo): Remove. (pinfo::lock_pinfo): Remove. (pinfo::unlock_pinfo): Remove. (pinfo::init): New method. Allocates shared memory space for process pinfo structure. (pinfo::record_death): Don't call locking functions. (cygwin_winpid_to_pid): Simplify by using new pinfo constructor. (EnumProcessesW95): New function for iterating over processes on Windows 95. (winpids::winpids): New constructor for winpids class. Sets up a list of process ids. (enum_init): Initialize w95/wnt pid enumerators. * shared.cc (shared-info::initialize): Remove pid initialization. * shared.h: Move pinfo stuff into pinfo.h. (class shared_info): Remove pinfo_list element. * signal.cc (kill_worker): Use pinfo constructor to access process info. (kill_pgrp): Ditto. Use winpids methods to access list of processes. * sigproc.cc: Throughout, modify to use _pinfo where appropriate. (proc_exists (pid_t)): New function. Determines if a process exists based on the pid. (proc_exists (_pinfo *p): Use new proc_exists function above. (proc_subproc): Copy pinfo stuff around rather than _pinfo pointers. Try to be careful about releasing shared memory when we don't need it anymore. Remove pinfo locks. (remove_zombies): Remove pinfo memory when zombie is going away. * sigproc.h: Reflect _pinfo/pinfo changes in sigproc.cc. * spawn.cc (spawn_guts): Eliminate pinfo *child argument. Reorganize to only initialize child pinfo after process has been started and we know the windows pid. (_spawnve): Reflect spawn_guts changes. * syscalls.cc (setpgid): Use pinfo constructor to access process info. (getpgid): Ditto. (internal_getlogin): Use _pinfo. * winsup.h: Eliminate pinfo_mutex. Eliminate spawn_guts declaration since it is static now. Reflect set_myself argument change. * include/sys/cygwin.h: Add some PID_* enums to accomodate new pinfo stuff. * include/cygwin/version.h: Update minor version for cygdrive changes below.
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class _pinfo;
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void __stdcall proc_terminate ();
void __stdcall sigproc_init ();
void __stdcall subproc_init ();
void __stdcall sigproc_terminate ();
BOOL __stdcall proc_exists (_pinfo *) __attribute__ ((regparm(1)));
BOOL __stdcall pid_exists (pid_t) __attribute__ ((regparm(1)));
int __stdcall sig_send (_pinfo *, int, DWORD ebp = (DWORD) __builtin_frame_address (0),
bool exception = 0) __attribute__ ((regparm(3)));
void __stdcall signal_fixup_after_fork ();
void __stdcall signal_fixup_after_exec ();
void __stdcall wait_for_sigthread ();
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extern char myself_nowait_dummy[];
extern char myself_nowait_nonmain_dummy[];
#define WAIT_SIG_PRIORITY THREAD_PRIORITY_TIME_CRITICAL
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* include/cygwin/version.h: Bump DLL minor version number to 5 due to all of the changes below. Redefine process structure to avoid a fixed size table. Redefine pinfo/_pinfo classes. Use these throughout. * dcrt0.cc (dll_crt0_1): Accomodate set_myself argument change. (__api_fatal): Accomodate _pinfo::record_death argument change. * exceptions.cc (really_exit): Ditto. (sig_handle_tty_stop): Use pinfo constructor to access process info. (events_init): Don't create pinfo_mutex since it is no longer required. * external.cc (fillout_pinfo): Use winpids class to iterate over all system pids. (cygwin_internal): lock_pinfo_for_update and unlock_pinfo are now noops. * fhandler_termios.cc (fhandler_termios::set_ctty): Use pinfo constructor to access process info. * fork.cc (fork): Reorganize to initialize child info after the child has started since that is when we know the child's winpid, which is necessary to allocate the pinfo shared memory. * mmap.cc (recreate_mmaps_after_fork): Change arg type to _pinfo. * pinfo.cc: Rename pinfo methods to _pinfo throughout. Eliminate pinfo_list stuff. (set_myself): Accept a pid argument now. Call pinfo initializer to initialize myself. Detect when this is an "execed" process and create an "indirect" pid block. (pinfo_init): Accomodate set_myself arg change. (procinfo): Remove. (pinfo::lock_pinfo): Remove. (pinfo::unlock_pinfo): Remove. (pinfo::init): New method. Allocates shared memory space for process pinfo structure. (pinfo::record_death): Don't call locking functions. (cygwin_winpid_to_pid): Simplify by using new pinfo constructor. (EnumProcessesW95): New function for iterating over processes on Windows 95. (winpids::winpids): New constructor for winpids class. Sets up a list of process ids. (enum_init): Initialize w95/wnt pid enumerators. * shared.cc (shared-info::initialize): Remove pid initialization. * shared.h: Move pinfo stuff into pinfo.h. (class shared_info): Remove pinfo_list element. * signal.cc (kill_worker): Use pinfo constructor to access process info. (kill_pgrp): Ditto. Use winpids methods to access list of processes. * sigproc.cc: Throughout, modify to use _pinfo where appropriate. (proc_exists (pid_t)): New function. Determines if a process exists based on the pid. (proc_exists (_pinfo *p): Use new proc_exists function above. (proc_subproc): Copy pinfo stuff around rather than _pinfo pointers. Try to be careful about releasing shared memory when we don't need it anymore. Remove pinfo locks. (remove_zombies): Remove pinfo memory when zombie is going away. * sigproc.h: Reflect _pinfo/pinfo changes in sigproc.cc. * spawn.cc (spawn_guts): Eliminate pinfo *child argument. Reorganize to only initialize child pinfo after process has been started and we know the windows pid. (_spawnve): Reflect spawn_guts changes. * syscalls.cc (setpgid): Use pinfo constructor to access process info. (getpgid): Ditto. (internal_getlogin): Use _pinfo. * winsup.h: Eliminate pinfo_mutex. Eliminate spawn_guts declaration since it is static now. Reflect set_myself argument change. * include/sys/cygwin.h: Add some PID_* enums to accomodate new pinfo stuff. * include/cygwin/version.h: Update minor version for cygdrive changes below.
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#define myself_nowait ((_pinfo *)myself_nowait_dummy)
#define myself_nowait_nonmain ((_pinfo *)myself_nowait_nonmain_dummy)
#endif /*_SIGPROC_H*/