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pthread_rwlockattr_setpshared(3)

NAME

     pthread_rwlockattr_setpshared -- set the process shared attribute

LIBRARY

     Reentrant C Library (libc_r, -lc_r)
     POSIX Threads Library (libpthread, -lpthread)
     1:1 Threading Library (libthr, -lthr)

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.  The pshared argu-
     ment 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.

SEE ALSO

     pthread_rwlockattr_getpshared(3), pthread_rwlockattr_init(3),
     pthread_rwlock_init(3)

STANDARDS

     The pthread_rwlockattr_setpshared() function is expected to conform to
     Version 2 of the Single UNIX Specification (``SUSv2'').

ERRORS

     The pthread_rwlockattr_setpshared() function will fail if:

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

HISTORY

     The pthread_rwlockattr_setpshared() function first appeared in
     FreeBSD 3.0.

BUGS

     The PTHREAD_PROCESS_SHARED attribute is not supported.

FreeBSD 5.4			August 4, 1998			   FreeBSD 5.4

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