PTHREAD_RWLOCKATTR_SETPSHAOpenBSD   Programmer'sPTHREAD_RWLOCKATTR_SETPSHARED(3)

NAME    [Toc]    [Back]

     pthread_rwlockattr_setpshared - set the process  shared  attribute

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.  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    [Toc]    [Back]

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

ERRORS    [Toc]    [Back]

     pthread_rwlockattr_setpshared() will fail if:

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

SEE ALSO    [Toc]    [Back]

     pthread_rwlock_init(3), pthread_rwlockattr_init(3)

STANDARDS    [Toc]    [Back]

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

HISTORY    [Toc]    [Back]

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

BUGS    [Toc]    [Back]

     The PTHREAD_PROCESS_SHARED attribute is not supported.

OpenBSD      3.6                          August      4,     1998