From 99a8fab5a63b69fe283ba8819240f5b5d4e023d0 Mon Sep 17 00:00:00 2001 From: Christopher Faylor Date: Fri, 29 Aug 2003 02:59:06 +0000 Subject: * sigproc.h: Make some functions regparm. * sigproc.cc (checkstate): Make regparm. (getevent): Change parameters in declaration, rename from getsem, make regparm. (sig_send): Recognize that nosync is now an event. Remove some old cruft from previous interrupt anywhere signal handler. (getevent): Change parameters in definition, rename from getsem. Allocate event rather than semaphore. (wait_sig): Treat sigcatch_nosync as an event. --- winsup/cygwin/sigproc.cc | 61 +++++++++++++++++++++--------------------------- winsup/cygwin/sigproc.h | 8 +++---- 2 files changed, 31 insertions(+), 38 deletions(-) (limited to 'winsup/cygwin') diff --git a/winsup/cygwin/sigproc.cc b/winsup/cygwin/sigproc.cc index 60c26072d..fd4f295cc 100644 --- a/winsup/cygwin/sigproc.cc +++ b/winsup/cygwin/sigproc.cc @@ -127,9 +127,9 @@ static bool NO_COPY pending_signals = false; // true if signals pending /* Functions */ -static int __stdcall checkstate (waitq *); +static int __stdcall checkstate (waitq *) __attribute__ ((regparm (1))); static __inline__ BOOL get_proc_lock (DWORD, DWORD); -static HANDLE __stdcall getsem (_pinfo *, const char *, int, int); +static HANDLE __stdcall getevent (_pinfo *, const char *) __attribute__ ((regparm (2))); static void __stdcall remove_zombie (int); static DWORD WINAPI wait_sig (VOID *arg); static int __stdcall stopped_or_terminated (waitq *, _pinfo *); @@ -679,18 +679,21 @@ sig_send (_pinfo *p, int sig, DWORD ebp, bool exception) sigproc_printf ("pid %d, signal %d, its_me %d", p->pid, sig, its_me); LONG *todo; + bool issem; if (its_me) { if (!wait_for_completion) { thiscatch = sigcatch_nosync; todo = myself->getsigtodo (sig); + issem = false; } else if (tid != mainthread.id) { thiscatch = sigcatch_nonmain; thiscomplete = sigcomplete_nonmain; todo = getlocal_sigtodo (sig); + issem = true; } else { @@ -698,12 +701,16 @@ sig_send (_pinfo *p, int sig, DWORD ebp, bool exception) thiscomplete = sigcomplete_main; thisframe.set (mainthread, ebp, exception); todo = getlocal_sigtodo (sig); + issem = true; } } - else if ((thiscatch = getsem (p, "sigcatch", 0, 0))) - todo = p->getsigtodo (sig); + else if ((thiscatch = getevent (p, "sigcatch"))) + { + todo = p->getsigtodo (sig); + issem = false; + } else - goto out; // Couldn't get the semaphore. getsem issued + goto out; // Couldn't get the semaphore. getevent issued // an error, if appropriate. #if WHEN_MULTI_THREAD_SIGNALS_WORK @@ -719,15 +726,7 @@ sig_send (_pinfo *p, int sig, DWORD ebp, bool exception) /* Notify the process that a signal has arrived. */ - SetLastError (0); - -#if 0 - int prio; - prio = GetThreadPriority (GetCurrentThread ()); - (void) SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_TIME_CRITICAL); -#endif - - if (!ReleaseSemaphore (thiscatch, 1, NULL) && (int) GetLastError () > 0) + if (issem ? !ReleaseSemaphore (thiscatch, 1, NULL) : !SetEvent (thiscatch)) { /* Couldn't signal the semaphore. This probably means that the * process is exiting. @@ -764,24 +763,9 @@ sig_send (_pinfo *p, int sig, DWORD ebp, bool exception) else { sigproc_printf ("Waiting for thiscomplete %p", thiscomplete); - - SetLastError (0); rc = WaitForSingleObject (thiscomplete, WSSC); -#if 0 // STILL NEEDED? - /* Check for strangeness due to this thread being redirected by the - signal handler. Sometimes a WAIT_TIMEOUT will occur when the - thread hasn't really timed out. So, check again. - FIXME: This isn't foolproof. */ - if (rc != WAIT_OBJECT_0 && - WaitForSingleObject (thiscomplete, 0) == WAIT_OBJECT_0) - rc = WAIT_OBJECT_0; -#endif } -#if 0 - SetThreadPriority (GetCurrentThread (), prio); -#endif - if (rc == WAIT_OBJECT_0) rc = 0; // Successful exit else @@ -892,7 +876,7 @@ out: /* Get or create a process specific semaphore used in message passing. */ static HANDLE __stdcall -getsem (_pinfo *p, const char *str, int init, int max) +getevent (_pinfo *p, const char *str) { HANDLE h; char sem_name[MAX_PATH]; @@ -912,14 +896,18 @@ getsem (_pinfo *p, const char *str, int init, int max) low_priority_sleep (1); } - SetLastError (0); if (p == NULL) { char sa_buf[1024]; DWORD winpid = GetCurrentProcessId (); +#if 0 h = CreateSemaphore (sec_user_nih (sa_buf), init, max, str = shared_name (sem_name, str, winpid)); +#else + h = CreateEvent (sec_user_nih (sa_buf), FALSE, FALSE, + str = shared_name (sem_name, str, winpid)); +#endif p = myself; if (!h) { @@ -929,8 +917,13 @@ getsem (_pinfo *p, const char *str, int init, int max) } else { +#if 0 h = OpenSemaphore (SEMAPHORE_ALL_ACCESS, FALSE, shared_name (sem_name, str, p->dwProcessId)); +#else + h = OpenEvent (EVENT_ALL_ACCESS, FALSE, + shared_name (sem_name, str, p->dwProcessId)); +#endif if (!h) { @@ -1075,7 +1068,7 @@ wait_sig (VOID *self) * sigcomplete_nonmain - semaphore signaled for non-main thread on signal * completion */ - sigcatch_nosync = getsem (NULL, "sigcatch", 0, MAXLONG); + sigcatch_nosync = getevent (NULL, "sigcatch"); sigcatch_nonmain = CreateSemaphore (&sec_none_nih, 0, MAXLONG, NULL); sigcatch_main = CreateSemaphore (&sec_none_nih, 0, MAXLONG, NULL); sigcomplete_nonmain = CreateSemaphore (&sec_none_nih, 0, MAXLONG, NULL); @@ -1198,7 +1191,7 @@ wait_sig (VOID *self) if (rc == RC_MAIN) { flush = true; - ReleaseSemaphore (sigcatch_nosync, 1, NULL); + SetEvent (sigcatch_nosync); goto out1; } break; @@ -1257,7 +1250,7 @@ wait_sig (VOID *self) out1: if (saw_failed_interrupt) { - ReleaseSemaphore (sigcatch_nosync, 1, NULL); + SetEvent (sigcatch_nosync); low_priority_sleep (0); /* Hopefully, other thread will be waking up soon. */ } sigproc_printf ("looping"); diff --git a/winsup/cygwin/sigproc.h b/winsup/cygwin/sigproc.h index d3061bc50..5cedaeae3 100644 --- a/winsup/cygwin/sigproc.h +++ b/winsup/cygwin/sigproc.h @@ -101,12 +101,12 @@ BOOL __stdcall my_parent_is_alive (); extern "C" int __stdcall sig_dispatch_pending (); extern "C" void __stdcall set_process_mask (sigset_t newmask); extern "C" void __stdcall reset_signal_arrived (); -int __stdcall sig_handle (int); -void __stdcall sig_clear (int); -void __stdcall sig_set_pending (int); +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))); int __stdcall handle_sigsuspend (sigset_t); -int __stdcall proc_subproc (DWORD, DWORD); +int __stdcall proc_subproc (DWORD, DWORD) __attribute__ ((regparm (2))); class _pinfo; void __stdcall proc_terminate (); -- cgit v1.2.3