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* cygtls.h (_cygtls::create_signal_arrived): New function. 

(_cygtls::set_signal_arrived): Lock creation of signal_arrived.
* cygwait.cc (cancelable_wait): Ignore signal_arrived event if _my_tls 'sig'
element does not exist.
* exceptions.cc (_cygtls::interrupt_setup): Create signal_arrived if recipient
thread has not created it.
This commit is contained in:
Christopher Faylor 2012-08-15 18:50:44 +00:00
parent 588b40e260
commit 879f3ad5ee
4 changed files with 36 additions and 7 deletions
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9
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,12 @@
2012-08-15 Christopher Faylor <me.cygwin2012@cgf.cx>
* cygtls.h (_cygtls::create_signal_arrived): New function.
(_cygtls::set_signal_arrived): Lock creation of signal_arrived.
* cygwait.cc (cancelable_wait): Ignore signal_arrived event if _my_tls
'sig' element does not exist.
* exceptions.cc (_cygtls::interrupt_setup): Create signal_arrived if
recipient thread has not created it.
2012-08-15 Christopher Faylor <me.cygwin2012@cgf.cx>
* gendef: Tighten up whitespace detection.

10
winsup/cygwin/cygtls.h
View File

@ -235,6 +235,10 @@ public:
void lock () __attribute__ ((regparm (1)));
void unlock () __attribute__ ((regparm (1)));
bool locked () __attribute__ ((regparm (1)));
void create_signal_arrived ()
{
signal_arrived = CreateEvent (&sec_none_nih, false, false, NULL);
}
void set_signal_arrived (bool setit, HANDLE& h)
{
if (!setit)
@ -242,7 +246,11 @@ public:
else
{
if (!signal_arrived)
signal_arrived = CreateEvent (&sec_none_nih, false, false, NULL);
{
lock ();
create_signal_arrived ();
unlock ();
}
h = signal_arrived;
signal_waiting = true;
}

16
winsup/cygwin/cygwait.cc
View File

@ -79,10 +79,18 @@ cancelable_wait (HANDLE object, PLARGE_INTEGER timeout, unsigned mask)
res = WAIT_TIMEOUT;
else if (res != sig_n)
/* all set */;
else if (is_cw_sig_eintr)
res = WAIT_SIGNALED; /* caller will deal with signals */
else if (_my_tls.call_signal_handler ())
continue;
else
{
_my_tls.lock ();
int sig = _my_tls.sig;
_my_tls.unlock ();
if (!sig)
continue;
if (is_cw_sig_eintr)
res = WAIT_SIGNALED; /* caller will deal with signals */
else if (_my_tls.call_signal_handler ())
continue;
}
break;
}

8
winsup/cygwin/exceptions.cc
View File

@ -796,8 +796,12 @@ _cygtls::interrupt_setup (int sig, void *handler, struct sigaction& siga)
this->sig = sig; // Should always be last thing set to avoid a race
if (incyg && signal_arrived)
SetEvent (signal_arrived);
if (incyg)
{
if (!signal_arrived)
create_signal_arrived ();
SetEvent (signal_arrived);
}
proc_subproc (PROC_CLEARWAIT, 1);
sigproc_printf ("armed signal_arrived %p, signal %d", signal_arrived, sig);