thread safe longjmp functions.
authordrepper <drepper>
Mon, 20 Apr 1998 18:12:49 +0000 (18:12 +0000)
committerdrepper <drepper>
Mon, 20 Apr 1998 18:12:49 +0000 (18:12 +0000)
linuxthreads/ptlongjmp.c [new file with mode: 0644]

diff --git a/linuxthreads/ptlongjmp.c b/linuxthreads/ptlongjmp.c
new file mode 100644 (file)
index 0000000..1397dba
--- /dev/null
@@ -0,0 +1,44 @@
+/* Linuxthreads - a simple clone()-based implementation of Posix        */
+/* threads for Linux.                                                   */
+/* Copyright (C) 1998 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.                 */
+
+/* Redefine siglongjmp and longjmp so that they interact correctly
+   with cleanup handlers */
+
+#include <setjmp.h>
+#include "pthread.h"
+#include "internals.h"
+
+static void pthread_cleanup_upto(__jmp_buf target)
+{
+  pthread_descr self = thread_self();
+  struct _pthread_cleanup_buffer * c;
+
+  for (c = self->p_cleanup;
+       c != NULL && _JMPBUF_UNWINDS(target, c);
+       c = c->prev)
+    c->routine(c->arg);
+  self->p_cleanup = c;
+}
+
+void siglongjmp(sigjmp_buf env, int val)
+{
+  pthread_cleanup_upto(env->__jmpbuf);
+  __libc_siglongjmp(env, val);
+}
+
+void longjmp(jmp_buf env, int val)
+{
+  pthread_cleanup_upto(env->__jmpbuf);
+  __libc_longjmp(env, val);
+}