| | 1 | .\" Copyright (c) 1998 Alex Nash |
| | 2 | .\" All rights reserved. |
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| | 11 | .\" documentation and/or other materials provided with the distribution. |
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| | 13 | .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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| | 27 | .Dd August 4, 1998 |
| | 28 | .Dt PTHREAD_RWLOCK_UNLOCK 3 |
| | 29 | .Os |
| | 30 | .Sh NAME |
| | 31 | .Nm pthread_rwlock_unlock |
| | 32 | .Nd release a read/write lock |
| | 33 | .Sh SYNOPSIS |
| | 34 | .In pthread.h |
| | 35 | .Ft int |
| | 36 | .Fn pthread_rwlock_unlock "pthread_rwlock_t *lock" |
| | 37 | .Sh DESCRIPTION |
| | 38 | The |
| | 39 | .Fn pthread_rwlock_unlock |
| | 40 | function is used to release the read/write lock previously obtained by |
| | 41 | .Fn pthread_rwlock_rdlock , |
| | 42 | .Fn pthread_rwlock_wrlock , |
| | 43 | .Fn pthread_rwlock_tryrdlock , |
| | 44 | or |
| | 45 | .Fn pthread_rwlock_trywrlock . |
| | 46 | .Sh RETURN VALUES |
| | 47 | If successful, the |
| | 48 | .Fn pthread_rwlock_unlock |
| | 49 | function will return zero. |
| | 50 | Otherwise an error number will be returned |
| | 51 | to indicate the error. |
| | 52 | .Pp |
| | 53 | The results are undefined if |
| | 54 | .Fa lock |
| | 55 | is not held by the calling thread. |
| | 56 | .Sh ERRORS |
| | 57 | The |
| | 58 | .Fn pthread_rwlock_unlock |
| | 59 | function may fail if: |
| | 60 | .Bl -tag -width Er |
| | 61 | .It Bq Er EINVAL |
| | 62 | The value specified by |
| | 63 | .Fa lock |
| | 64 | is invalid. |
| | 65 | .It Bq Er EPERM |
| | 66 | The current thread does not own the read/write lock. |
| | 67 | .El |
| | 68 | .Sh SEE ALSO |
| | 69 | .Xr pthread_rwlock_rdlock 3 , |
| | 70 | .Xr pthread_rwlock_wrlock 3 |
| | 71 | .Sh STANDARDS |
| | 72 | The |
| | 73 | .Fn pthread_rwlock_unlock |
| | 74 | function is expected to conform to |
| | 75 | .St -susv2 . |
| | 76 | .Sh HISTORY |
| | 77 | The |
| | 78 | .Fn pthread_rwlock_unlock |
| | 79 | function first appeared in |
| | 80 | .Fx 3.0 . |
projects / apple / libpthread.git / blame_incremental