1  /* Copyright (C) 1992-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       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     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <stddef.h>
      19  #include <setjmpP.h>
      20  #include <signal.h>
      21  
      22  /* This function is called by the `sigsetjmp' macro
      23     before doing a `__setjmp' on ENV[0].__jmpbuf.
      24     Always return zero.  */
      25  
      26  int
      27  __sigjmp_save (sigjmp_buf env, int savemask)
      28  {
      29    env[0].__mask_was_saved = (savemask
      30  			     && __sigprocmask (SIG_BLOCK, (sigset_t *) NULL,
      31  					       (sigset_t *) &env[0].__saved_mask) == 0);
      32  
      33    return 0;
      34  }