pthread_rwlockattr_getpshared
- get the process shared attribute
LIBRARY
Lb libpthread
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 returned via
Fa 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
If successful, the
pthread_rwlockattr_getpshared ();
function will return zero.
Otherwise an error number will be returned
to indicate the error.
ERRORS
The
pthread_rwlockattr_getpshared ();
function may fail if:
