pthread_rwlockattr_getpshared()

Get the process-shared attribute of a read-write lock attribute object

Synopsis:

#include <pthread.h>

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

Library:

libc

Description:

The pthread_rwlockattr_getpshared() function gets the the process-shared attribute for the read-write lock attribute object specified by attr, storing it in pshared.

To let any thread with access to the read-write lock object's memory operate it, the process-shared attribute must be set to PTHREAD_PROCESS_SHARED, even if those threads are in different processes. Set the process-shared attribute to PTHREAD_PROCESS_PRIVATE to limit access to threads in the current process.

Returns:

EOK

Success.

EINVAL

Invalid read-write lock attribute object attr.

Classification:

Standard Unix

See also:

pthread_rwlockattr_destroy(), pthread_rwlockattr_init(), pthread_rwlockattr_setpshared()