PTHREAD_ATFORK(3) FreeBSD Library Functions Manual PTHREAD_ATFORK(3)
NAME
pthread_atfork - register fork handlers
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS
#include <pthread.h>
int
pthread_atfork(void (*prepare)(void), void (*parent)(void),
void (*child)(void));
DESCRIPTION
The pthread_atfork() function declares fork handlers to be called before
and after fork(2), in the context of the thread that called fork(2).
The handlers registered with pthread_atfork() are called at the moments
in time described below:
prepare Before fork(2) processing commences in the parent process. If
more than one prepare handler is registered they will be called
in the opposite order they were registered.
parent After fork(2) completes in the parent process. If more than one
parent handler is registered they will be called in the same
order they were registered.
child After fork(2) processing completes in the child process. If
more than one child handler is registered they will be called in
the same order they were registered.
If no handling is desired at one or more of these three points, a null
pointer may be passed as the corresponding fork handler.
RETURN VALUES
If successful, the pthread_atfork() function will return zero. Otherwise
an error number will be returned to indicate the error.
ERRORS
The pthread_atfork() function will fail if:
[ENOMEM] Insufficient table space exists to record the fork
handler addresses.
SEE ALSO
fork(2), pthread(3)
STANDARDS
The pthread_atfork() function is expected to conform to IEEE Std 1003.1
("POSIX.1").
AUTHORS
This manpage was written by Alex Vasylenko <
[email protected]>.
FreeBSD 14.1-RELEASE-p8 June 21, 2004 FreeBSD 14.1-RELEASE-p8