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author | jasone <jasone@FreeBSD.org> | 2000-02-16 19:31:53 +0000 |
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committer | jasone <jasone@FreeBSD.org> | 2000-02-16 19:31:53 +0000 |
commit | 940003aae4b377da53e62c8838831e666a2ed6ba (patch) | |
tree | 1351093952e1b2b320b3cbacd06d92cc9d46f07c /lib/libc/gen/sem_post.3 | |
parent | 48146806a14e6fb2abfc5602a9d9e6d787f44076 (diff) | |
download | FreeBSD-src-940003aae4b377da53e62c8838831e666a2ed6ba.zip FreeBSD-src-940003aae4b377da53e62c8838831e666a2ed6ba.tar.gz |
Add man pages for the sem_*() functions.
Approved by: jkh
Diffstat (limited to 'lib/libc/gen/sem_post.3')
-rw-r--r-- | lib/libc/gen/sem_post.3 | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/lib/libc/gen/sem_post.3 b/lib/libc/gen/sem_post.3 new file mode 100644 index 0000000..c578e6d --- /dev/null +++ b/lib/libc/gen/sem_post.3 @@ -0,0 +1,71 @@ +.\" Copyright (C) 2000 Jason Evans <jasone@canonware.com>. +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice(s), this list of conditions and the following disclaimer as +.\" the first lines of this file unmodified other than the possible +.\" addition of one or more copyright notices. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice(s), this list of conditions and the following disclaimer in +.\" the documentation and/or other materials provided with the +.\" distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY +.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE +.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR +.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, +.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE +.\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, +.\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +.\" +.\" $FreeBSD$ +.Dd February 15, 2000 +.Dt SEM_POST 3 +.Os +.Sh NAME +.Nm sem_post +.Nd increment (unlock) a semaphore +.Sh SYNOPSIS +.Fd #include <semaphore.h> +.Ft int +.Fn sem_post "sem_t *sem" +.Sh DESCRIPTION +The +.Fn sem_post +function increments (unlocks) the semaphore pointed to by +.Fa sem . +If there are threads blocked on the semaphore when +.Fn sem_post +is called, then the highest priority thread that has been blocked the longest on +the semaphore will be allowed to return from +.Fn sem_wait . +.Sh RETURN VALUES +If successful, +.Fn sem_post +returns 0. Otherwise, -1 is returned and +.Va errno +is set to indicate the type of +error. +.Sh ERRORS +.Fn sem_post +will fail if: +.Bl -tag -width Er +.It Bq Er EINVAL +.Fa sem +points to an invalid semaphore. +.El +.Sh SEE ALSO +.Xr sem_wait 3 , +.Xr sem_trywait 3 +.Sh STANDARDS +.Fn sem_post +conforms to ISO/IEC 9945-1 ANSI/IEEE +.Pq Dq Tn POSIX +Std 1003.1 1996 Edition. |