| | 1 | .\" Copyright (c) 1997 Brian Cully <shmit@kublai.com> |
| | 2 | .\" All rights reserved. |
| | 3 | .\" |
| | 4 | .\" Redistribution and use in source and binary forms, with or without |
| | 5 | .\" modification, are permitted provided that the following conditions |
| | 6 | .\" are met: |
| | 7 | .\" 1. Redistributions of source code must retain the above copyright |
| | 8 | .\" notice, this list of conditions and the following disclaimer. |
| | 9 | .\" 2. Redistributions in binary form must reproduce the above copyright |
| | 10 | .\" notice, this list of conditions and the following disclaimer in the |
| | 11 | .\" documentation and/or other materials provided with the distribution. |
| | 12 | .\" 3. Neither the name of the author nor the names of any co-contributors |
| | 13 | .\" may be used to endorse or promote products derived from this software |
| | 14 | .\" without specific prior written permission. |
| | 15 | .\" |
| | 16 | .\" THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND |
| | 17 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 18 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 19 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 20 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 21 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 22 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 23 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 24 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 25 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 26 | .\" SUCH DAMAGE. |
| | 27 | .\" |
| | 28 | .\" $FreeBSD$ |
| | 29 | .\" |
| | 30 | .Dd July 30, 1998 |
| | 31 | .Dt PTHREAD_MUTEX_UNLOCK 3 |
| | 32 | .Os |
| | 33 | .Sh NAME |
| | 34 | .Nm pthread_mutex_unlock |
| | 35 | .Nd unlock a mutex |
| | 36 | .Sh SYNOPSIS |
| | 37 | .In pthread.h |
| | 38 | .Ft int |
| | 39 | .Fn pthread_mutex_unlock "pthread_mutex_t *mutex" |
| | 40 | .Sh DESCRIPTION |
| | 41 | If the current thread holds the lock on |
| | 42 | .Fa mutex , |
| | 43 | then the |
| | 44 | .Fn pthread_mutex_unlock |
| | 45 | function unlocks |
| | 46 | .Fa mutex . |
| | 47 | .Pp |
| | 48 | Calling |
| | 49 | .Fn pthread_mutex_unlock |
| | 50 | with a |
| | 51 | .Fa mutex |
| | 52 | that the calling thread does not hold will result |
| | 53 | in undefined behavior. |
| | 54 | .Sh RETURN VALUES |
| | 55 | If successful, |
| | 56 | .Fn pthread_mutex_unlock |
| | 57 | will return zero, otherwise an error number will be returned to |
| | 58 | indicate the error. |
| | 59 | .Sh ERRORS |
| | 60 | The |
| | 61 | .Fn pthread_mutex_unlock |
| | 62 | function will fail if: |
| | 63 | .Bl -tag -width Er |
| | 64 | .It Bq Er EINVAL |
| | 65 | The value specified by |
| | 66 | .Fa mutex |
| | 67 | is invalid. |
| | 68 | .It Bq Er EPERM |
| | 69 | The current thread does not hold a lock on |
| | 70 | .Fa mutex . |
| | 71 | .El |
| | 72 | .Sh SEE ALSO |
| | 73 | .Xr pthread_mutex_destroy 3 , |
| | 74 | .Xr pthread_mutex_init 3 , |
| | 75 | .Xr pthread_mutex_lock 3 , |
| | 76 | .Xr pthread_mutex_trylock 3 |
| | 77 | .Sh STANDARDS |
| | 78 | The |
| | 79 | .Fn pthread_mutex_unlock |
| | 80 | function conforms to |
| | 81 | .St -p1003.1-96 . |
projects / apple / libpthread.git / blame_incremental