PTHREAD_SWITCH_ADD_NP(3) FreeBSD Library Functions Manual
NAME
pthread_switch_add_np, pthread_switch_delete_np - thread context switches
debugging primitives
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS
#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_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.
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:
[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()
function.
SEE ALSO
pthread_create(3), pthread_np(3)
AUTHORS
This manual page was written by Alexey Zelkin <
[email protected]>.
FreeBSD 14.1-RELEASE-p8 October 12, 2021 FreeBSD 14.1-RELEASE-p8