.\" the source, must acknowledge the copyright and authors of this work.
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-.TH SEM_POST 3 2012-05-13 "Linux" "Linux Programmer's Manual"
+.TH SEM_POST 3 2014-02-26 "Linux" "Linux Programmer's Manual"
.SH NAME
sem_post \- unlock a semaphore
.SH SYNOPSIS
.B EOVERFLOW
.\" Added in POSIX.1-2008 TC1 (Austin Interpretation 213)
The maximum allowable value for a semaphore would be exceeded.
+.SH ATTRIBUTES
+.SS Multithreading (see pthreads(7))
+The
+.BR sem_post ()
+function is thread-safe.
.SH CONFORMING TO
POSIX.1-2001.
.SH NOTES