From 416d2de60b8e567ac7cd6a581afba0f5cdfc932e Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Tue, 31 Dec 2002 08:00:19 +0000
Subject: Update.

2002-12-30  Ulrich Drepper  <drepper@redhat.com>

	* malloc/thread-m.h (thread_atfork): Define using __register_atfork.
---
 linuxthreads/ptfork.c | 99 +++++++++++++++++++--------------------------------
 1 file changed, 37 insertions(+), 62 deletions(-)

(limited to 'linuxthreads/ptfork.c')

diff --git a/linuxthreads/ptfork.c b/linuxthreads/ptfork.c
index 564f8d7c75..195ffcd1b0 100644
--- a/linuxthreads/ptfork.c
+++ b/linuxthreads/ptfork.c
@@ -21,96 +21,71 @@
 #include "pthread.h"
 #include "internals.h"
 #include <bits/libc-lock.h>
+#include "fork.h"
 
-struct handler_list {
-  void (*handler)(void);
-  struct handler_list * next;
-};
+extern int __libc_fork (void);
 
-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 __pthread_fork (struct fork_block *b)
 {
   pid_t pid;
+  list_t *runp;
+
+  __libc_lock_lock (b->lock);
 
-  pthread_mutex_lock(&pthread_atfork_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_call_handlers(pthread_atfork_prepare);
   __pthread_once_fork_prepare();
   __flockfilelist();
 
-  pid = __libc_fork();
+  pid = ARCH_FORK ();
 
   if (pid == 0) {
     __pthread_reset_main_thread();
 
     __fresetlockfiles();
     __pthread_once_fork_child();
-    pthread_call_handlers(pthread_atfork_child);
 
-    pthread_mutex_init(&pthread_atfork_lock, NULL);
+    /* 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();
-    pthread_call_handlers(pthread_atfork_parent);
 
-    pthread_mutex_unlock(&pthread_atfork_lock);
+    /* 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;
 }
 
+pid_t __fork (void)
+{
+  return __libc_fork ();
+}
 weak_alias (__fork, fork);
 
 pid_t __vfork(void)
 {
-  return __fork();
+  return __libc_fork ();
 }
 weak_alias (__vfork, vfork);
-- 
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