Back to index

glibc  2.9
sigjmp.c
Go to the documentation of this file.
00001 /* Copyright (C) 1992, 1994, 1997 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 /* This function is called by the `sigsetjmp' macro
00024    before doing a `__setjmp' on ENV[0].__jmpbuf.
00025    Always return zero.  */
00026 
00027 int
00028 __sigjmp_save (sigjmp_buf env, int savemask)
00029 {
00030   env[0].__mask_was_saved = (savemask &&
00031                           __sigprocmask (SIG_BLOCK, (sigset_t *) NULL,
00032                                        &env[0].__saved_mask) == 0);
00033 
00034   return 0;
00035 }