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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /setjmp/longjmp.c
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initial import
Diffstat (limited to 'setjmp/longjmp.c')
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1 files changed, 40 insertions, 0 deletions
diff --git a/setjmp/longjmp.c b/setjmp/longjmp.c
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+/* Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C 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.
+
+The GNU C 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 the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <stddef.h>
+#include <setjmp.h>
+#include <signal.h>
+
+
+/* Set the signal mask to the one specified in ENV, and jump
+ to the position specified in ENV, causing the setjmp
+ call there to return VAL, or 1 if VAL is 0. */
+void
+longjmp (sigjmp_buf env, int val)
+{
+ if (env[0].__mask_was_saved)
+ /* Restore the saved signal mask. */
+ (void) __sigprocmask (SIG_SETMASK, &env[0].__saved_mask,
+ (sigset_t *) NULL);
+
+ /* Call the machine-dependent function to restore machine state. */
+ __longjmp (env[0].__jmpbuf, val ?: 1);
+}
+
+weak_alias (longjmp, _longjmp)
+weak_alias (longjmp, siglongjmp)