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newlib-cygwin
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* signal.cc (sigpending): Move. 

* sigproc.cc (sigpending): To here.
(getlocal_sigtodo): Return process-local signal array.
(sigpending): Accommodate new process-local signal array.
(sig_send): Ditto.
(sig_set_pending): Ditto.
(wait_sig): Ditto.
This commit is contained in:
Christopher Faylor 2003-08-19 05:47:44 +00:00
parent 05cb7b17cb
commit 06bb489932
3 changed files with 107 additions and 66 deletions
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10
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,13 @@
2003-08-19 Christopher Faylor <cgf@redhat.com>
* signal.cc (sigpending): Move.
* sigproc.cc (sigpending): To here.
(getlocal_sigtodo): Return process-local signal array.
(sigpending): Accommodate new process-local signal array.
(sig_send): Ditto.
(sig_set_pending): Ditto.
(wait_sig): Ditto.
2003-08-19 Christopher Faylor <cgf@redhat.com>
Throughout, eliminate argument to sig_dispatch_pending.

11
winsup/cygwin/signal.cc
View File

@ -407,17 +407,6 @@ sigfillset (sigset_t *set)
return 0;
}
extern "C" int
sigpending (sigset_t *set)
{
unsigned bit;
*set = 0;
for (int sig = 1; sig < NSIG; sig++)
if (*myself->getsigtodo (sig) && myself->getsigmask () & (bit = SIGTOMASK (sig)))
*set |= bit;
return 0;
}
extern "C" int
sigsuspend (const sigset_t *set)
{

152
winsup/cygwin/sigproc.cc
View File

@ -48,6 +48,12 @@ details. */
#define NZOMBIES 256
LONG local_sigtodo[TOTSIGS];
inline LONG* getlocal_sigtodo (int sig)
{
return local_sigtodo + __SIGOFFSET + sig;
}
/*
* Global variables
*/
@ -508,9 +514,22 @@ void __stdcall
sig_clear (int sig)
{
(void) InterlockedExchange (myself->getsigtodo (sig), 0L);
(void) InterlockedExchange (getlocal_sigtodo (sig), 0L);
return;
}
extern "C" int
sigpending (sigset_t *set)
{
unsigned bit;
*set = 0;
for (int sig = 1; sig < NSIG; sig++)
if ((*getlocal_sigtodo (sig) || *myself->getsigtodo (sig))
&& (myself->getsigmask () & (bit = SIGTOMASK (sig))))
*set |= bit;
return 0;
}
/* Force the wait_sig thread to wake up and scan the sigtodo array.
*/
extern "C" int __stdcall
@ -659,6 +678,7 @@ 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;
if (its_me)
{
if (!wait_for_completion)
@ -674,8 +694,11 @@ sig_send (_pinfo *p, int sig, DWORD ebp, bool exception)
thiscomplete = sigcomplete_main;
thisframe.set (mainthread, ebp, exception);
}
todo = getlocal_sigtodo (sig);
}
else if (!(thiscatch = getsem (p, "sigcatch", 0, 0)))
else if (thiscatch = getsem (p, "sigcatch", 0, 0))
todo = p->getsigtodo (sig);
else
goto out; // Couldn't get the semaphore. getsem issued
// an error, if appropriate.
@ -688,7 +711,7 @@ sig_send (_pinfo *p, int sig, DWORD ebp, bool exception)
/* Increment the sigtodo array to signify which signal to assert.
*/
(void) InterlockedIncrement (p->getsigtodo (sig));
(void) InterlockedIncrement (todo);
/* Notify the process that a signal has arrived.
*/
@ -740,6 +763,7 @@ sig_send (_pinfo *p, int sig, DWORD ebp, bool exception)
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.
@ -747,6 +771,7 @@ sig_send (_pinfo *p, int sig, DWORD ebp, bool exception)
if (rc != WAIT_OBJECT_0 &&
WaitForSingleObject (thiscomplete, 0) == WAIT_OBJECT_0)
rc = WAIT_OBJECT_0;
#endif
}
#if 0
@ -775,7 +800,7 @@ out:
void __stdcall
sig_set_pending (int sig)
{
(void) InterlockedIncrement (myself->getsigtodo (sig));
(void) InterlockedIncrement (getlocal_sigtodo (sig));
return;
}
@ -1028,6 +1053,7 @@ talktome ()
static DWORD WINAPI
wait_sig (VOID *self)
{
LONG *todos[] = {getlocal_sigtodo (0), myself->getsigtodo (0)};
/* Initialization */
(void) SetThreadPriority (GetCurrentThread (), WAIT_SIG_PRIORITY);
@ -1111,69 +1137,85 @@ wait_sig (VOID *self)
}
rc -= WAIT_OBJECT_0;
sigproc_printf ("awake");
sigproc_printf ("awake, rc %d", rc);
LONG **start_todo, **end_todo;
switch (rc)
{
case 0:
start_todo = todos;
end_todo = todos;
break;
case 1:
start_todo = todos + 1;
end_todo = todos + 1;
default:
start_todo = todos;
end_todo = todos + 1;
}
/* A sigcatch semaphore has been signaled. Scan the sigtodo
* array looking for any unprocessed signals.
*/
pending_signals = -1;
bool saw_pending_signals = false;
bool saw_sigchld = false;
for (int sig = -__SIGOFFSET; sig < NSIG; sig++)
{
LONG x = InterlockedDecrement (myself->getsigtodo (sig));
if (x < 0)
InterlockedIncrement (myself->getsigtodo (sig));
else if (x >= 0)
{
if (x > 0)
pending_signals = 1;
for (LONG **todo = start_todo; todo <= end_todo; todo++)
for (int sig = -__SIGOFFSET; sig < NSIG; sig++)
{
LONG x = InterlockedDecrement (*todo + sig);
if (x < 0)
InterlockedIncrement (*todo + sig);
else if (x >= 0)
{
if (x > 0)
pending_signals = 1;
if (sig == SIGCHLD)
saw_sigchld = true;
if (sig == SIGCHLD)
saw_sigchld = true;
if (sig > 0 && sig != SIGKILL && sig != SIGSTOP &&
(sigismember (&myself->getsigmask (), sig) ||
main_vfork->pid ||
(sig != SIGCONT && ISSTATE (myself, PID_STOPPED))))
{
sigproc_printf ("signal %d blocked", sig);
InterlockedIncrement (myself->getsigtodo (sig));
}
else
{
/* Found a signal to process */
sigproc_printf ("processing signal %d", sig);
switch (sig)
{
case __SIGFLUSH:
/* just forcing the loop */
break;
if (sig > 0 && sig != SIGKILL && sig != SIGSTOP &&
(sigismember (&myself->getsigmask (), sig) ||
main_vfork->pid ||
(sig != SIGCONT && ISSTATE (myself, PID_STOPPED))))
{
sigproc_printf ("signal %d blocked", sig);
InterlockedIncrement (*todo + sig);
}
else
{
/* Found a signal to process */
sigproc_printf ("processing signal %d", sig);
switch (sig)
{
case __SIGFLUSH:
/* just forcing the loop */
break;
/* Internal signal to turn on stracing. */
case __SIGSTRACE:
strace.hello ();
break;
/* Internal signal to turn on stracing. */
case __SIGSTRACE:
strace.hello ();
break;
case __SIGCOMMUNE:
talktome ();
break;
case __SIGCOMMUNE:
talktome ();
break;
/* A normal UNIX signal */
default:
sigproc_printf ("Got signal %d", sig);
if (!sig_handle (sig))
{
sigproc_printf ("couldn't send signal %d", sig);
low_priority_sleep (SLEEP_0_STAY_LOW); /* Hopefully, other process will be waking up soon. */
saw_pending_signals = true;
ReleaseSemaphore (sigcatch_nosync, 1, NULL);
InterlockedIncrement (myself->getsigtodo (sig));
}
break;
}
}
}
}
/* A normal UNIX signal */
default:
sigproc_printf ("Got signal %d", sig);
if (!sig_handle (sig))
{
sigproc_printf ("couldn't send signal %d", sig);
low_priority_sleep (SLEEP_0_STAY_LOW); /* Hopefully, other process will be waking up soon. */
saw_pending_signals = true;
ReleaseSemaphore (sigcatch_nosync, 1, NULL);
InterlockedIncrement (*todo + sig);
}
break;
}
}
}
}
if (saw_pending_signals)
pending_signals = 1;