pthread_switch_add_np, pthread_switch_delete_np - thread context switches debugging primitives
Library Synopsis Description Return Values Errors See Also Authors
.In pthread_np.h int pthread_switch_add_np "pthread_switch_routine_t routine" int pthread_switch_delete_np "pthread_switch_routine_t routine"
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_create(3) 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.
If successful, these functions return 0. Otherwise, an error number is returned to indicate the error.
The pthread_switch_add_np may fail if:
The pthread_switch_delete_np may fail if: