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

NAME    [Toc]    [Back]

     pthread_rwlockattr_getpshared -- get the process shared attribute

LIBRARY    [Toc]    [Back]

     Reentrant C Library (libc_r, -lc_r)

SYNOPSIS    [Toc]    [Back]

     #include <pthread.h>

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

DESCRIPTION    [Toc]    [Back]

     The pthread_rwlockattr_getpshared() function is used to get the process
     shared setting of a read/write lock attribute object.  The setting is
     returned 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 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_getpshared() function will return
     zero.  Otherwise an error number will be returned to indicate the error.

SEE ALSO    [Toc]    [Back]

     pthread_rwlockattr_init(3), pthread_rwlockattr_setpshared(3),
     pthread_rwlock_init(3)

STANDARDS    [Toc]    [Back]

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

ERRORS    [Toc]    [Back]

     The pthread_rwlockattr_getpshared() function may fail if:

     [EINVAL]		The value specified by attr is invalid.

HISTORY    [Toc]    [Back]

     The pthread_rwlockattr_getpshared() function first appeared in
     FreeBSD 3.0.


FreeBSD 5.2.1			March 22, 1999			 FreeBSD 5.2.1