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pthreads.7: Describe return value from pthreads functions 

Describe the usual success (0) and failure (non-zero) returns,
and note that POSIX.1-2001 specifies that pthreads functions
can never fail with the error EINTR.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk 2008-10-17 21:27:28 +02:00
parent fa802e7b90
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man7/pthreads.7
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@ -106,6 +106,13 @@ capabilities (see
.IP \- 3
CPU affinity
.RB ( sched_setaffinity (2))
.SS "Pthreads function return values"
Most pthreads functions return 0 on sucess, and an error number of failure.
Note that the pthreads functions do not set
.IR errno .
For each of the pthreads functions that can return an error,
POSIX.1-2001 specifies that the function can never fail with the error
.BR EINTR .
.SS "Thread-safe functions"
A thread-safe function is one that can be safely
(i.e., it will deliver the same results regardless of whether it is)