/* Linuxthreads - a simple clone()-based implementation of Posix */ /* threads for Linux. */ /* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ /* */ /* This program is free software; you can redistribute it and/or */ /* modify it under the terms of the GNU Library General Public License */ /* as published by the Free Software Foundation; either version 2 */ /* of the License, or (at your option) any later version. */ /* */ /* This program is distributed in the hope that it will be useful, */ /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ /* GNU Library General Public License for more details. */ /* The "atfork" stuff */ #include <errno.h> #include <stddef.h> #include <stdlib.h> #include <unistd.h> #include "pthread.h" #include "internals.h" #include <bits/libc-lock.h> #include "fork.h" extern int __libc_fork (void); pid_t __pthread_fork (struct fork_block *b) { pid_t pid; list_t *runp; __libc_lock_lock (b->lock); /* Run all the registered preparation handlers. In reverse order. */ list_for_each_prev (runp, &b->prepare_list) { struct fork_handler *curp; curp = list_entry (runp, struct fork_handler, list); curp->handler (); } __pthread_once_fork_prepare(); __flockfilelist(); pid = ARCH_FORK (); if (pid == 0) { __pthread_reset_main_thread(); __fresetlockfiles(); __pthread_once_fork_child(); /* Run the handlers registered for the child. */ list_for_each (runp, &b->child_list) { struct fork_handler *curp; curp = list_entry (runp, struct fork_handler, list); curp->handler (); } __libc_lock_init (b->lock); } else { __funlockfilelist(); __pthread_once_fork_parent(); /* Run the handlers registered for the parent. */ list_for_each (runp, &b->parent_list) { struct fork_handler *curp; curp = list_entry (runp, struct fork_handler, list); curp->handler (); } __libc_lock_unlock (b->lock); } return pid; } /* psm: have no idea why these are here, sjhill? */ #if 0 /*def SHARED*/ pid_t __fork (void) { return __libc_fork (); } weak_alias (__fork, fork) pid_t __vfork(void) { return __libc_fork (); } weak_alias (__vfork, vfork) #endif