[PATCH] Fix nanosleep

Christopher Faylor cgf@redhat.com
Tue May 6 14:26:00 GMT 2003


On Tue, May 06, 2003 at 04:02:23PM +0200, Thomas Pfaff wrote:
>Christopher Faylor wrote:
>>I don't know what you're investigating but the basic problem with threads
>>and signals is that you can't send a signal to a thread.  I never 
>>implemented
>>that part of signal delivery.
>
>Indeed you are right:
>
>pthread_kill does not work as expected, instead of sending a signal to 
>the specified thread all threads are woken up and the signal handler is 
>not called in the context of that particular thread but in the context 
>of the main thread. Since all threads are waiting for the same global 
>signal_arrived and not for thread specific one it is clear that this 
>does not work.
>
>And i would like to know why every thread has its own sigaction 
>structure. AFAIK signals are global in the process and not thread 
>specific, and only the delivery to a thread can be blocked via 
>pthread_sigmask.

I assume it is just pure meanness as usual.

cgf



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