1 .\" Copyright (c) 1998 Alex Nash
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25 .\" $FreeBSD: src/share/man/man3/pthread_rwlockattr_setpshared.3,v 1.15 2007/10/22 10:08:01 ru Exp $
26 .\" $DragonFly: src/lib/libc_r/man/pthread_rwlockattr_setpshared.3,v 1.3 2006/02/17 19:35:07 swildner Exp $
29 .Dt PTHREAD_RWLOCKATTR_SETPSHARED 3
32 .Nm pthread_rwlockattr_setpshared
33 .Nd set the process shared attribute
39 .Fn pthread_rwlockattr_setpshared "pthread_rwlockattr_t *attr" "int pshared"
42 .Fn pthread_rwlockattr_setpshared
43 function sets the process shared attribute of
45 to the value referenced by
49 argument may be one of two values:
50 .Bl -tag -width ".Dv PTHREAD_PROCESS_PRIVATE"
51 .It Dv PTHREAD_PROCESS_SHARED
52 Any thread of any process that has access to the memory where the
53 read/write lock resides can manipulate the lock.
54 .It Dv PTHREAD_PROCESS_PRIVATE
55 Only threads created within the same process as the thread that
56 initialized the read/write lock can manipulate the lock.
62 .Fn pthread_rwlockattr_setpshared
63 function will return zero.
64 Otherwise an error number will be returned
65 to indicate the error.
68 .Fn pthread_rwlockattr_setpshared
69 function will fail if:
72 The value specified by
79 .Xr pthread_rwlockattr_getpshared 3 ,
80 .Xr pthread_rwlockattr_init 3 ,
81 .Xr pthread_rwlock_init 3
84 .Fn pthread_rwlockattr_setpshared
85 function is expected to conform to
89 .Fn pthread_rwlockattr_setpshared
90 function first appeared in
94 .Dv PTHREAD_PROCESS_SHARED
95 attribute is not supported.