#include <pthread_np.h> int
pthread_switch_add_np (pthread_switch_routine_t routine); int
pthread_switch_delete_np (pthread_switch_routine_t routine);
DESCRIPTION
An application is allowed to monitor the thread context switches inside
the threading library.
An application can install a routine that gets called every time a thread
(explicitly created by an application with the
pthread_create3
function) gets the context switched.
The routine is passed the thread IDs of the threads that are
being switched in and out.
Installation and removal of these hooks may be done using the
pthread_switch_add_np ();
and
pthread_switch_delete_np ();
functions respectively.
RETURN VALUES
If successful,
these functions return 0.
Otherwise, an error number is returned to indicate the error.
ERRORS
The
pthread_switch_add_np ();
may fail if:
Bq Er EINVAL
NULL
pointer was passed in the
Fa routine
argument.
The
pthread_switch_delete_np ();
may fail if:
Bq Er EINVAL
The
Fa routine
argument is different from the argument previously passed to the
pthread_switch_add_np ();
function.
