diff options
Diffstat (limited to 'libpthread/linuxthreads/ptfork.c')
-rw-r--r-- | libpthread/linuxthreads/ptfork.c | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/libpthread/linuxthreads/ptfork.c b/libpthread/linuxthreads/ptfork.c deleted file mode 100644 index eb544f34b..000000000 --- a/libpthread/linuxthreads/ptfork.c +++ /dev/null @@ -1,126 +0,0 @@ -/* 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. */ - -/* mods for uClibc: removed strong alias and defined funcs properly */ - -/* The "atfork" stuff */ - -#include <errno.h> - -#ifdef __ARCH_HAS_MMU__ - -#include <stddef.h> -#include <stdlib.h> -#include <unistd.h> -#include "pthread.h" -#include "internals.h" - -struct handler_list { - void (*handler)(void); - struct handler_list * next; -}; - -static pthread_mutex_t pthread_atfork_lock = PTHREAD_MUTEX_INITIALIZER; -static struct handler_list * pthread_atfork_prepare = NULL; -static struct handler_list * pthread_atfork_parent = NULL; -static struct handler_list * pthread_atfork_child = NULL; - -static void pthread_insert_list(struct handler_list ** list, - void (*handler)(void), - struct handler_list * newlist, - int at_end) -{ - if (handler == NULL) return; - if (at_end) { - while(*list != NULL) list = &((*list)->next); - } - newlist->handler = handler; - newlist->next = *list; - *list = newlist; -} - -struct handler_list_block { - struct handler_list prepare, parent, child; -}; - -int pthread_atfork(void (*prepare)(void), - void (*parent)(void), - void (*child)(void)) -{ - struct handler_list_block * block = - (struct handler_list_block *) malloc(sizeof(struct handler_list_block)); - if (block == NULL) return ENOMEM; - pthread_mutex_lock(&pthread_atfork_lock); - /* "prepare" handlers are called in LIFO */ - pthread_insert_list(&pthread_atfork_prepare, prepare, &block->prepare, 0); - /* "parent" handlers are called in FIFO */ - pthread_insert_list(&pthread_atfork_parent, parent, &block->parent, 1); - /* "child" handlers are called in FIFO */ - pthread_insert_list(&pthread_atfork_child, child, &block->child, 1); - pthread_mutex_unlock(&pthread_atfork_lock); - return 0; -} -//strong_alias (__pthread_atfork, pthread_atfork) - -static inline void pthread_call_handlers(struct handler_list * list) -{ - for (/*nothing*/; list != NULL; list = list->next) (list->handler)(); -} - -extern int __libc_fork(void); - -pid_t __fork(void) -{ - pid_t pid; - struct handler_list * prepare, * child, * parent; - - pthread_mutex_lock(&pthread_atfork_lock); - prepare = pthread_atfork_prepare; - child = pthread_atfork_child; - parent = pthread_atfork_parent; - pthread_mutex_unlock(&pthread_atfork_lock); - pthread_call_handlers(prepare); - pid = __libc_fork(); - if (pid == 0) { - __pthread_reset_main_thread(); - __fresetlockfiles(); - pthread_call_handlers(child); - } else { - pthread_call_handlers(parent); - } - return pid; -} -weak_alias (__fork, fork); - -pid_t __vfork(void) -{ - return __fork(); -} -weak_alias (__vfork, vfork); - -#else - -/* We can't support pthread_atfork without MMU, since we don't have - fork(), and we can't offer the correct semantics for vfork(). */ -int pthread_atfork(void (*prepare)(void), - void (*parent)(void), - void (*child)(void)) -{ - /* ENOMEM is probably pushing it a little bit. - Take it as `no *virtual* memory' :-) */ - errno = ENOMEM; - return -1; -} - -#endif |