Re: Signals and threads

Re: Signals and threads

[Robert Hancock]

shibu-kundara wrote:
>     Hi
> 
> I have a problem using sigaction function in pthread library.
> I have 2 thread each one registering
> 
> in threadA
>  act1.sa_handler=func1;
>  if(sigaction(SIGUSR1,&act1,NULL)) printf("\nSigaction failed! in th1
> !!\n");
> 
> in threadB
>  act1.sa_handler=func2;
>  if(sigaction(SIGUSR1,&act2,NULL)) printf("\nSigaction failed! in th2
> !!\n");
> 
> but when i send signal SIGUSR1 to threadA , threadA  receives the
> signal
> but the handler func2 is getting called,
> 
> 
> Please let me know is there any way to solve this problem?
> thanks in advance
> thomas
> 

Signal handlers are global to the process. You can't create different 
handlers for the same signal in multiple threads.

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Robert Hancock      Saskatoon, SK, Canada
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