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PTHREAD_RWLOCKATTR_SETPSHARED(3)
			  OpenBSD Programmer's Manual
					      PTHREAD_RWLOCKATTR_SETPSHARED(3)

NAME
     pthread_rwlockattr_setpshared - set the process shared attribute

SYNOPSIS
     #include <pthread.h>

     int
     pthread_rwlockattr_setpshared(pthread_rwlockattr_t *attr, int pshared);

DESCRIPTION
     The pthread_rwlockattr_setpshared() function sets the process shared
     attribute of attr to the value referenced by pshared.  pshared may be one
     of two values:

	 PTHREAD_PROCESS_SHARED	   Any thread of any process that has access
				   to the memory where the read/write lock
				   resides can manipulate the lock.

	 PTHREAD_PROCESS_PRIVATE   Only threads created within the same
				   process as the thread that initialized the
				   read/write lock can manipulate the lock.
				   This is the default value.

RETURN VALUES
     If successful, the pthread_rwlockattr_setpshared() function will return
     zero.  Otherwise an error number will be returned to indicate the error.

ERRORS
     pthread_rwlockattr_setpshared() will fail if:

     [EINVAL]	   The value specified by attr or pshared is invalid.

SEE ALSO
     pthread_rwlock_init(3), pthread_rwlockattr_init(3)

STANDARDS
     The pthread_rwlockattr_setpshared() function is expected to conform to
     Version 2 of the Single UNIX Specification.

HISTORY
     The pthread_rwlockattr_setpshared() function first appeared in
     FreeBSD 3.0 and OpenBSD 2.5.

BUGS
     The PTHREAD_PROCESS_SHARED attribute is not supported.

OpenBSD 4.9			 May 31, 2007			   OpenBSD 4.9

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