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authorrpj <rpj>1999-03-16 03:36:06 +0000
committerrpj <rpj>1999-03-16 03:36:06 +0000
commitc5573bf7ed426f069c951a15d726305c293d50b3 (patch)
tree638b44a280497285ce8e82cc1414fa4d02622a80 /fork.c
parentf8af93c39f8deebc46aee1b25be9d5c40035d0d8 (diff)
Tue Mar 16 1999 Ross Johnson <rpj@ixobrychus.canberra.edu.au>
* all: Add GNU LGPL and Copyright and Warranty.
Diffstat (limited to 'fork.c')
-rw-r--r--fork.c150
1 files changed, 18 insertions, 132 deletions
diff --git a/fork.c b/fork.c
index 61da545..9d74813 100644
--- a/fork.c
+++ b/fork.c
@@ -3,141 +3,27 @@
*
* Description:
* Implementation of fork() for POSIX threads.
+ *
+ * Pthreads-win32 - POSIX Threads Library for Win32
+ * Copyright (C) 1998
+ *
+ * This library 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 library 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.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA
*/
#include "pthread.h"
#include "implement.h"
-#if 0 /* Pre Bossom */
-
-int
-pthread_atfork(void (*prepare)(void),
- void (*parent)(void),
- void (*child)(void))
-{
- /* Push handlers (unless NULL) onto their respective stacks.
-
- Local implementation semantics:
- If we get an ENOMEM at any time in here then ALL handlers
- (including those from previous pthread_atfork() calls) will be
- popped off each of the three atfork stacks before we return. */
-
- int ret = 0;
-
- if (prepare != NULL)
- {
- /* Push prepare. */
- if (_pthread_handler_push(_PTHREAD_FORKPREPARE_STACK,
- _PTHREAD_HANDLER_POP_FIFO,
- (void (*)(void *)) prepare,
- NULL) == ENOMEM)
- {
- ret = ENOMEM;
- }
- }
-
- if (parent != NULL &&
- ret != ENOMEM)
- {
- /* Push parent. */
- if (_pthread_handler_push(_PTHREAD_FORKPARENT_STACK,
- _PTHREAD_HANDLER_POP_LIFO,
- (void (*)(void *)) parent,
- NULL) == ENOMEM)
- {
- ret = ENOMEM;
- }
- }
-
- if (child != NULL &&
- ret != ENOMEM)
- {
- /* Push child. */
- if (_pthread_handler_push(_PTHREAD_FORKCHILD_STACK,
- _PTHREAD_HANDLER_POP_LIFO,
- (void (*)(void *)) child,
- NULL) == ENOMEM)
- {
- ret = ENOMEM;
- }
- }
-
- if (ret == ENOMEM)
- {
- /* Pop all handlers without executing them before we return
- the error. */
- _pthread_handler_pop_all(_PTHREAD_FORKPREPARE_STACK,
- _PTHREAD_HANDLER_NOEXECUTE);
-
- _pthread_handler_pop_all(_PTHREAD_FORKPARENT_STACK,
- _PTHREAD_HANDLER_NOEXECUTE);
-
- _pthread_handler_pop_all(_PTHREAD_FORKCHILD_STACK,
- _PTHREAD_HANDLER_NOEXECUTE);
- }
-
- return ret;
-}
-
-/* It looks like the GNU linker is capable of selecting this version of
- fork() over a version provided in more primitive libraries further down
- the linker command line. */
-
-#if HAVE_PID_T && HAVE_FORK
-
-pid_t
-fork()
-{
- pid_t pid;
-
- /* Pop prepare handlers here. */
- _pthread_handler_pop_all(_PTHREAD_FORKPREPARE_STACK,
- _PTHREAD_HANDLER_EXECUTE);
-
- /* Now call the real fork(). */
-
- if ((pid = _fork()) > 0)
- {
- /* PARENT */
- /* Clear the child handler stack. */
- _pthread_handler_pop_all(_PTHREAD_FORKCHILD_STACK,
- _PTHREAD_HANDLER_NOEXECUTE);
-
- /* Pop parent handlers and execute them. */
- _pthread_handler_pop_all(_PTHREAD_FORKPARENT_STACK,
- _PTHREAD_HANDLER_EXECUTE);
-
- /* At this point all three atfork stacks are empty. */
- return pid;
- }
- else
- {
- /* CHILD */
- /* Clear the parent handler stack. */
- _pthread_handler_pop_all(_PTHREAD_FORKPARENT_STACK,
- _PTHREAD_HANDLER_NOEXECUTE);
-
- /* Pop child handlers and execute them. */
- _pthread_handler_pop_all(_PTHREAD_FORKCHILD_STACK,
- _PTHREAD_HANDLER_EXECUTE);
-
- /* At this point all three atfork stacks are empty. */
-
- /* Terminate all threads except pthread_self() using
- pthread_cancel(). */
- _pthread_cancel_all_not_self();
-
- /* Wait for them to finish before we continue. */
- _pthread_join_all_not_self();
-
- return 0;
- }
-
- /* Not reached. */
- return 0;
-}
-
-#endif /* HAVE_PID_T && HAVE_FORK */
-
-#endif /* Pre Bossom */