94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
/* Linuxthreads - a simple clone()-based implementation of Posix */
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/* threads for Linux. */
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/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */
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/* */
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/* This program is free software; you can redistribute it and/or */
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/* modify it under the terms of the GNU Library General Public License */
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/* as published by the Free Software Foundation; either version 2 */
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/* of the License, or (at your option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, */
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/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
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/* GNU Library General Public License for more details. */
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/* The "atfork" stuff */
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#include <errno.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "pthread.h"
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#include "internals.h"
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#include <bits/libc-lock.h>
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#include "fork.h"
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extern int __libc_fork (void);
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pid_t __pthread_fork (struct fork_block *b)
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{
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pid_t pid;
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list_t *runp;
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__libc_lock_lock (b->lock);
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/* Run all the registered preparation handlers. In reverse order. */
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list_for_each_prev (runp, &b->prepare_list)
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{
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struct fork_handler *curp;
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curp = list_entry (runp, struct fork_handler, list);
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curp->handler ();
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}
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__pthread_once_fork_prepare();
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__flockfilelist();
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pid = ARCH_FORK ();
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if (pid == 0) {
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__pthread_reset_main_thread();
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__fresetlockfiles();
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__pthread_once_fork_child();
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/* Run the handlers registered for the child. */
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list_for_each (runp, &b->child_list)
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{
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struct fork_handler *curp;
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curp = list_entry (runp, struct fork_handler, list);
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curp->handler ();
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}
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__libc_lock_init (b->lock);
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} else {
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__funlockfilelist();
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__pthread_once_fork_parent();
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/* Run the handlers registered for the parent. */
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list_for_each (runp, &b->parent_list)
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{
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struct fork_handler *curp;
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curp = list_entry (runp, struct fork_handler, list);
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curp->handler ();
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}
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__libc_lock_unlock (b->lock);
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}
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return pid;
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}
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#ifdef SHARED
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pid_t __fork (void)
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{
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return __libc_fork ();
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}
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weak_alias (__fork, fork);
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pid_t __vfork(void)
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{
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return __libc_fork ();
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}
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weak_alias (__vfork, vfork);
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#endif
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