| | 1 | .\" Copyright (c) 1998 Alex Nash |
| | 2 | .\" All rights reserved. |
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| | 27 | .Dd March 22, 1999 |
| | 28 | .Dt PTHREAD_RWLOCKATTR_GETPSHARED 3 |
| | 29 | .Os |
| | 30 | .Sh NAME |
| | 31 | .Nm pthread_rwlockattr_getpshared |
| | 32 | .Nd get the process shared attribute |
| | 33 | .Sh SYNOPSIS |
| | 34 | .In pthread.h |
| | 35 | .Ft int |
| | 36 | .Fn pthread_rwlockattr_getpshared "const pthread_rwlockattr_t *attr" "int *pshared" |
| | 37 | .Sh DESCRIPTION |
| | 38 | The |
| | 39 | .Fn pthread_rwlockattr_getpshared |
| | 40 | function is used to get the process shared setting of a read/write |
| | 41 | lock attribute object. |
| | 42 | The setting is returned via |
| | 43 | .Fa pshared , |
| | 44 | and may be one of two values: |
| | 45 | .Bl -tag -width PTHREAD_PROCESS_PRIVATE |
| | 46 | .It Dv PTHREAD_PROCESS_SHARED |
| | 47 | Any thread of any process that has access to the memory where the |
| | 48 | read/write lock resides can manipulate the lock. |
| | 49 | .It Dv PTHREAD_PROCESS_PRIVATE |
| | 50 | Only threads created within the same process as the thread that |
| | 51 | initialized the read/write lock can manipulate the lock. |
| | 52 | This is |
| | 53 | the default value. |
| | 54 | .El |
| | 55 | .Sh RETURN VALUES |
| | 56 | If successful, the |
| | 57 | .Fn pthread_rwlockattr_getpshared |
| | 58 | function will return zero. |
| | 59 | Otherwise an error number will be returned |
| | 60 | to indicate the error. |
| | 61 | .Sh ERRORS |
| | 62 | The |
| | 63 | .Fn pthread_rwlockattr_getpshared |
| | 64 | function may fail if: |
| | 65 | .Bl -tag -width Er |
| | 66 | .It Bq Er EINVAL |
| | 67 | The value specified by |
| | 68 | .Fa attr |
| | 69 | is invalid. |
| | 70 | .El |
| | 71 | .Sh SEE ALSO |
| | 72 | .Xr pthread_rwlock_init 3 , |
| | 73 | .Xr pthread_rwlockattr_init 3 , |
| | 74 | .Xr pthread_rwlockattr_setpshared 3 |
| | 75 | .Sh STANDARDS |
| | 76 | The |
| | 77 | .Fn pthread_rwlockattr_getpshared |
| | 78 | function is expected to conform to |
| | 79 | .St -susv2 . |
| | 80 | .Sh HISTORY |
| | 81 | The |
| | 82 | .Fn pthread_rwlockattr_getpshared |
| | 83 | function first appeared in |
| | 84 | .Fx 3.0 . |
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