PTHREAD_RWLOCKATTR_GETPSHAOpenBSD Programmer'sPTHREAD_RWLOCKATTR_GETPSHARED(3)

NAME
     pthread_rwlockattr_getpshared - get the process shared attribute

SYNOPSIS
     #include <pthread.h>

     int
     pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *attr,
             int *pshared);

DESCRIPTION
     The pthread_rwlockattr_getpshared() function is used to get the process
     shared setting of a read/write lock attribute object.  The setting is re-
     turned via pshared, and 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 re-
                                   sides can manipulate the lock.

         PTHREAD_PROCESS_PRIVATE   Only threads created within the same pro-
                                   cess 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_getpshared() function will return
     zero.  Otherwise an error number will be returned to indicate the error.

ERRORS
     pthread_rwlockattr_getpshared() may fail if:

     [EINVAL]      The value specified by attr is invalid.

SEE ALSO
     pthread_rwlock_init(3), pthread_rwlockattr_init(3),
     pthread_rwlockattr_setpshared(3)

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

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

OpenBSD 4.1                     March 22, 1999                               1
