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Fix final round of gcc warnings relating to unused parameters.

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* debug.cc (iscygthread): New function.
* debug.h: Declare it.
* exceptions.cc (set_process_mask): Flush pending signals.
(handle_sigsuspend): No need to flush pending signals.
(call_handler): Refine previous tests of muto ownership.  Only clear wait()'s
when we have definitely responded to a signal.
* fhandler_console.cc (fhandler_console::read): Don't set EINTR if executing in
a "cygwin" thread.
* sigproc.cc (proc_subproc): Use second argument to control whether CLEARWAIT
actually sets "signalled" flag.
* sync.h (muto): Add 'unstable' method.
This commit is contained in:
Christopher Faylor
2000-02-24 06:45:32 +00:00
parent fb87c246a7
commit 9aa07a8f60
9 changed files with 65 additions and 26 deletions
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30
winsup/cygwin/exceptions.cc
View File

@ -598,7 +598,6 @@ handle_sigsuspend (sigset_t tempmask)
// interested in through.
sigproc_printf ("old mask %x, new mask %x", oldmask, tempmask);
sig_dispatch_pending (0);
WaitForSingleObject (signal_arrived, INFINITE);
set_sig_errno (EINTR); // Per POSIX
@ -705,6 +704,7 @@ set_sig_errno (int e)
{
set_errno (e);
sigsave.saved_errno = e;
debug_printf ("errno %d", e);
}
static int
@ -738,21 +738,21 @@ call_handler (int sig, struct sigaction& siga, void *handler)
for (;;)
{
res = SuspendThread (hth);
/* FIXME: Make multi-thread aware */
if (sync_proc_subproc->owner () != maintid && mask_sync->owner () != maintid)
break;
if (res)
goto set_pending;
/* FIXME: Make multi-thread aware */
if (!sync_proc_subproc->unstable () && sync_proc_subproc->owner () != maintid &&
!mask_sync->unstable () && mask_sync->owner () != maintid)
break;
ResumeThread (hth);
Sleep (0);
}
sigproc_printf ("suspend said %d, %E", res);
/* Clear any waiting threads prior to dispatching to handler function */
proc_subproc(PROC_CLEARWAIT, 0);
if (sigsave.cx)
{
cx = sigsave.cx;
@ -782,8 +782,15 @@ call_handler (int sig, struct sigaction& siga, void *handler)
}
(void) ResumeThread (hth);
if (interrupted)
(void) SetEvent (signal_arrived); // For an EINTR case
{
/* Clear any waiting threads prior to dispatching to handler function */
proc_subproc(PROC_CLEARWAIT, 1);
/* Apparently we have to set signal_arrived after resuming the thread or it
is possible that the event will be ignored. */
(void) SetEvent (signal_arrived); // For an EINTR case
}
sigproc_printf ("armed signal_arrived %p, res %d", signal_arrived, res);
out:
@ -840,11 +847,16 @@ ctrl_c_handler (DWORD type)
extern "C" void __stdcall
set_process_mask (sigset_t newmask)
{
extern DWORD sigtid;
mask_sync->acquire (INFINITE);
sigset_t oldmask = myself->getsigmask ();
newmask &= ~SIG_NONMASKABLE;
sigproc_printf ("old mask = %x, new mask = %x", myself->getsigmask (), newmask);
myself->setsigmask (newmask); // Set a new mask
mask_sync->release ();
if (oldmask != newmask && GetCurrentThreadId () != sigtid)
sig_dispatch_pending ();
return;
}
@ -1076,7 +1088,7 @@ _sigreturn:
addl $4,%%esp
call _set_process_mask@4
popl %%eax # saved errno
testl %%eax,%%eax # lt 0
testl %%eax,%%eax # Is it < 0
jl 1f # yup. ignore it
movl %1,%%ebx
movl %%eax,(%%ebx)