1 .\" Copyright (c) 1998 Alex Nash
2 .\" All rights reserved.
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25 .\" $FreeBSD: src/lib/libc_r/man/pthread_rwlockattr_setpshared.3,v 1.3.2.4 2001/12/17 10:08:26 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
48 may be one of two values:
49 .Bl -tag -width PTHREAD_PROCESS_PRIVATE
50 .It Dv PTHREAD_PROCESS_SHARED
51 Any thread of any process that has access to the memory where the
52 read/write lock resides can manipulate the lock.
53 .It Dv PTHREAD_PROCESS_PRIVATE
54 Only threads created within the same process as the thread that
55 initialized the read/write lock can manipulate the lock. This is
60 .Fn pthread_rwlockattr_setpshared
61 function will return zero. Otherwise an error number will be returned
62 to indicate the error.
64 .Fn pthread_rwlockattr_setpshared
68 The value specified by
75 .Xr pthread_rwlockattr_init 3 ,
76 .Xr pthread_rwlockattr_setpshared 3 ,
77 .Xr pthread_rwlock_init 3
80 .Fn pthread_rwlockattr_setpshared
81 function is expected to conform to
85 .Fn pthread_rwlockattr_setpshared
86 function first appeared in
90 .Dv PTHREAD_PROCESS_SHARED
91 attribute is not supported.