linux-kernel - Re: Multithreading and signals on linux

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Message-id: <44F4EDAB.3000903@shaw.ca>
Date:	Tue, 29 Aug 2006 19:45:15 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	Shrikrishna Khare <shri.khare@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Multithreading and signals on linux

Shrikrishna Khare wrote:
> Hi,
> 
>     Am using pthread_kill to send SIGUSR1 from thread t1 to thread t2.
> However, I am unable to have "different" signal handlers for threads t1
> and t2 for same signal SIGUSR1.
>     I have ensured that I set the signal handler for t1 and t2
> separately in different functions. Could anyone please tell me if I am
> missing on something?

The signal will be handled in the thread specified, however signal 
handlers are global to the process. You cannot have different signal 
handlers for different threads in the same process. This is the way 
POSIX pthreads are specified to work.

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@...pamshaw.ca
Home Page: http://www.roberthancock.com/

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