[Bug c++/21240] Deadlock (pthread) in signal handler

[szehau at gmail dot com]

------- Additional Comments From szehau at gmail dot com  2005-04-28 02:06 
-------
(In reply to comment #1)
> Do you have a testcase?
> On second thought pthreads and mutex lockes and signals are out of the scope
of a compiler, If this is 
> a bug, this is a glibc bug but I really doubt it.

In this case, I need to know whether there is a fucntion that I can use to check
whether a mutex is currently locked.

For example:



void alarmHdl (int sig) {

        // Check whether a mutext is lock here

        bool locked = someFunctionToCheckMutexIsLocked ();

        if (!locked) {
                // other tasks here that might call malloc or free
        }

}


int main () {

        signal (SIGALRM, alarmHdl);

        alarm (5);

        // a big loop

        for (;;) {
                // tasks here might call malloc or free
        }

        return 0;
}

Thanks

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21240