sigjmp.c 1.3 KB

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  1. /* Copyright (C) 1992, 1994, 1997 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, write to the Free
  13. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  14. 02111-1307 USA. */
  15. #include <stddef.h>
  16. #include <setjmp.h>
  17. #include <signal.h>
  18. #include <libc-internal.h>
  19. /* This function is called by the `sigsetjmp' macro
  20. before doing a `__setjmp' on ENV[0].__jmpbuf.
  21. Always return zero. */
  22. attribute_hidden
  23. int __sigjmp_save (sigjmp_buf env, int savemask)
  24. {
  25. env[0].__mask_was_saved = (savemask &&
  26. __sigprocmask (SIG_BLOCK, (sigset_t *) NULL, &env[0].__saved_mask) == 0);
  27. return 0;
  28. }