Very Computer

I've got a problem.  I want to get at thread-specific data in a signal handler.

A couple points:

1) pthread_getspecific() is not on the list of async-safe functions for susv2 or
for posix

2) Xavier Leroy, original author of linuxthreads, has written code that uses
pthread_getspecific() in a signal handler, and has stated "I can't think of any
reasonable implementation of pthread_getspecific() that would not be
async-signal safe, though."

3) I can find no documentation stating that pthread_getspecific() is async-safe
on linux.

So, is it safe or not?  Can anyone give or point to a definitive answer?

Chris

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Chris Friesen                    | MailStop: 043/33/F10
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Quote:> So, is it safe or not?  

Quote:> Can anyone give or point to a definitive answer?

However, with i686 compilations of glibc, which use %gs rather than
%esp to access the thread descriptor, I think you'll be "safe".

This is also quite likely to work on other UNICes, but may not work
on some ;-(

Cheers,
--
In order to understand recursion you must first understand recursion.