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glibc  2.9
longjmp.c
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00001 /* Copyright (C) 1991,92,94,95,97,98,2000,2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <stddef.h>
00020 #include <setjmp.h>
00021 #include <signal.h>
00022 
00023 
00024 /* Set the signal mask to the one specified in ENV, and jump
00025    to the position specified in ENV, causing the setjmp
00026    call there to return VAL, or 1 if VAL is 0.  */
00027 void
00028 __libc_siglongjmp (sigjmp_buf env, int val)
00029 {
00030   /* Perform any cleanups needed by the frames being unwound.  */
00031   _longjmp_unwind (env, val);
00032 
00033   if (env[0].__mask_was_saved)
00034     /* Restore the saved signal mask.  */
00035     (void) __sigprocmask (SIG_SETMASK, &env[0].__saved_mask,
00036                        (sigset_t *) NULL);
00037 
00038   /* Call the machine-dependent function to restore machine state.  */
00039   __longjmp (env[0].__jmpbuf, val ?: 1);
00040 }
00041 
00042 strong_alias (__libc_siglongjmp, __libc_longjmp)
00043 libc_hidden_def (__libc_longjmp)
00044 weak_alias (__libc_siglongjmp, _longjmp)
00045 weak_alias (__libc_siglongjmp, longjmp)
00046 weak_alias (__libc_siglongjmp, siglongjmp)