PTHREAD_RWLOCKATTR_... FreeBSD Library Functions Manual PTHREAD_RWLOCKATTR_...

NAME    [Toc]    [Back]

     pthread_rwlockattr_setpshared -- set the process shared attribute

LIBRARY    [Toc]    [Back]

     Reentrant C Library (libc_r, -lc_r)

SYNOPSIS    [Toc]    [Back]

     #include <pthread.h>

     int
     pthread_rwlockattr_setpshared(pthread_rwlockattr_t *attr, int pshared);

DESCRIPTION    [Toc]    [Back]

     The pthread_rwlockattr_setpshared() function sets the process shared
     attribute of attr to the value referenced by pshared.  The pshared argument
 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    [Toc]    [Back]

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

SEE ALSO    [Toc]    [Back]

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

STANDARDS    [Toc]    [Back]

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

ERRORS    [Toc]    [Back]

     The pthread_rwlockattr_setpshared() function will fail if:

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

HISTORY    [Toc]    [Back]

     The pthread_rwlockattr_setpshared() function first appeared in
     FreeBSD 3.0.

BUGS    [Toc]    [Back]

     The PTHREAD_PROCESS_SHARED attribute is not supported.


FreeBSD 5.2.1			August 4, 1998			 FreeBSD 5.2.1