1 .\" Copyright (c) 1998 Alex Nash
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28 .Dt PTHREAD_RWLOCKATTR_SETPSHARED 3
31 .Nm pthread_rwlockattr_setpshared
32 .Nd set the process shared attribute
34 .Fd #include <pthread.h>
36 .Fn pthread_rwlockattr_setpshared "pthread_rwlockattr_t *attr" "int *pshared"
39 .Fn pthread_rwlockattr_setpshared
40 function sets the process shared attribute of
42 to the value referenced by
45 may be one of two values:
46 .Bl -hang -offset flag -width 123456789012345678901234
47 .It Ar PTHREAD_PROCESS_SHARED
48 Any thread of any process that has access to the memory where the
49 read/write lock resides can manipulate the lock.
50 .It Ar PTHREAD_PROCESS_PRIVATE
51 Only threads created within the same process as the thread that
52 initialized the read/write lock can manipulate the lock. This is
57 .Fn pthread_rwlockattr_setpshared
58 function will return zero. Otherwise an error number will be returned
59 to indicate the error.
61 .Xr pthread_rwlock_init 3 ,
62 .Xr pthread_rwlockattr_init 3 ,
63 .Xr pthread_rwlockattr_setpshared 3
66 .Fn pthread_rwlockattr_setpshared
67 function is expected to conform to
70 .Fn pthread_rwlockattr_setpshared
74 The value specified by
82 .Fn pthread_rwlockattr_setpshared
83 function first appeared in
86 The PTHREAD_PROCESS_SHARED attribute is not supported.