| | 1 | .\" Copyright (c) 1997 Brian Cully <shmit@kublai.com> |
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| | 30 | .Dd July 30, 1998 |
| | 31 | .Dt PTHREAD_MUTEX_TRYLOCK 3 |
| | 32 | .Os |
| | 33 | .Sh NAME |
| | 34 | .Nm pthread_mutex_trylock |
| | 35 | .Nd attempt to lock a mutex without blocking |
| | 36 | .Sh SYNOPSIS |
| | 37 | .In pthread.h |
| | 38 | .Ft int |
| | 39 | .Fn pthread_mutex_trylock "pthread_mutex_t *mutex" |
| | 40 | .Sh DESCRIPTION |
| | 41 | The |
| | 42 | .Fn pthread_mutex_trylock |
| | 43 | function locks |
| | 44 | .Fa mutex . |
| | 45 | If the mutex is already locked, |
| | 46 | .Fn pthread_mutex_trylock |
| | 47 | will not block waiting for the mutex, but will return an error condition. |
| | 48 | .Sh RETURN VALUES |
| | 49 | If successful, |
| | 50 | .Fn pthread_mutex_trylock |
| | 51 | will return zero, otherwise an error number will be returned to |
| | 52 | indicate the error. |
| | 53 | .Sh ERRORS |
| | 54 | The |
| | 55 | .Fn pthread_mutex_trylock |
| | 56 | function will fail if: |
| | 57 | .Bl -tag -width Er |
| | 58 | .It Bq Er EINVAL |
| | 59 | The value specified by |
| | 60 | .Fa mutex |
| | 61 | is invalid. |
| | 62 | .It Bq Er EBUSY |
| | 63 | .Fa Mutex |
| | 64 | is already locked. |
| | 65 | .El |
| | 66 | .Sh SEE ALSO |
| | 67 | .Xr pthread_mutex_destroy 3 , |
| | 68 | .Xr pthread_mutex_init 3 , |
| | 69 | .Xr pthread_mutex_lock 3 , |
| | 70 | .Xr pthread_mutex_unlock 3 |
| | 71 | .Sh STANDARDS |
| | 72 | The |
| | 73 | .Fn pthread_mutex_trylock |
| | 74 | function conforms to |
| | 75 | .St -p1003.1-96 . |
projects / apple / libpthread.git / blame_incremental