PTHREAD_SWITCH_ADD_NP(3) BSD Library Functions Manual PTHREAD_SWITCH_ADD_NP(3)NAME
pthread_switch_add_np, pthread_switch_delete_np — thread context switches
POSIX Threads Library (libpthread, -lpthread)
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 respec‐
If successful, these functions return 0. Otherwise, an error number is
returned to indicate the error.
The pthread_switch_add_np() may fail if:
[EINVAL] NULL pointer was passed in the routine argument.
The pthread_switch_delete_np() may fail if:
[EINVAL] The routine argument is different from the argument
previously passed to the pthread_switch_add_np() func‐
This manual page was written by Alexey Zelkin ⟨phantom@FreeBSD.org⟩.
BSD February 13, 2003 BSD