lkml.org 
[lkml]   [2008]   [Jun]   [22]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateSun, 22 Jun 2008 08:33:51 +0200
From"Bart Van Assche" <>
SubjectRe: Any lightweight way for one thread to force another thread to suspend execution?
On Sun, Jun 22, 2008 at 3:55 AM, Eric Smith <eric@brouhaha.com> wrote:
> Andi wrote:
>> Any such mechanism will need a syscall, and it's unlikely that
>> any syscall will get much cheaper than a kill(SIGSTOP)
>
> But is there a way for the process sending the SIGSTOP to wait until it
> has taken effect?  I need a method to *synchronously* stop another
> thread.  That's why I thought I probably needed something more
> elaborate than SIGSTOP, though I'd like to minimize the number of
> system calls required.

Are you aware that SIGSTOP suspends all the threads in a process
instead of a single thread ? (Note: this is how the NPTL behaves. With
LinuxThreads it was possible to suspend a single thread via SIGSTOP,
but this was a violation of the POSIX standards.)

Bart.


\
 
 \ /
  Last update: 2008-06-22 08:37    [from the cache]
©2003-2008