pthread_rwlockattr_setpshared
- set the process shared attribute
LIBRARY
Lb libpthread
SYNOPSIS
#include <pthread.h> int
pthread_rwlockattr_setpshared (pthread_rwlockattr_t *attr int pshared);
DESCRIPTION
The
pthread_rwlockattr_setpshared ();
function sets the process shared attribute of
Fa attr
to the value referenced by
Fa pshared .
The
Fa pshared
argument 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_setpshared ();
function will return zero.
Otherwise an error number will be returned
to indicate the error.
ERRORS
The
pthread_rwlockattr_setpshared ();
function will fail if:
Bq Er EINVAL
The value specified by
Fa attr
or
Fa pshared
is invalid.
