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sourceware.org Git - glibc.git/blob - setjmp/longjmp.c
1 /* Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If
16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
17 Cambridge, MA 02139, USA. */
24 extern void _longjmp_unwind (jmp_buf env
, int val
);
26 /* Set the signal mask to the one specified in ENV, and jump
27 to the position specified in ENV, causing the setjmp
28 call there to return VAL, or 1 if VAL is 0. */
30 longjmp (sigjmp_buf env
, int val
)
32 /* Perform any cleanups needed by the frames being unwound. */
33 _longjmp_unwind (env
, val
);
35 if (env
[0].__mask_was_saved
)
36 /* Restore the saved signal mask. */
37 (void) __sigprocmask (SIG_SETMASK
, &env
[0].__saved_mask
,
40 /* Call the machine-dependent function to restore machine state. */
41 __longjmp (env
[0].__jmpbuf
, val
?: 1);
44 weak_alias (longjmp
, _longjmp
)
45 weak_alias (longjmp
, siglongjmp
)
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