pt-raise.c 1.7 KB

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  1. /* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
  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. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #include <errno.h>
  17. #include <signal.h>
  18. #include <sysdep.h>
  19. #include <tls.h>
  20. #include <bits/kernel-features.h>
  21. int
  22. raise (
  23. int sig)
  24. {
  25. #if __ASSUME_TGKILL || defined __NR_tgkill
  26. /* raise is an async-safe function. It could be called while the
  27. fork function temporarily invalidated the PID field. Adjust for
  28. that. */
  29. pid_t pid = THREAD_GETMEM (THREAD_SELF, pid);
  30. if (__builtin_expect (pid < 0, 0))
  31. pid = -pid;
  32. #endif
  33. #if __ASSUME_TGKILL
  34. return INLINE_SYSCALL (tgkill, 3, pid, THREAD_GETMEM (THREAD_SELF, tid),
  35. sig);
  36. #else
  37. # ifdef __NR_tgkill
  38. int res = INLINE_SYSCALL (tgkill, 3, pid, THREAD_GETMEM (THREAD_SELF, tid),
  39. sig);
  40. if (res != -1 || errno != ENOSYS)
  41. return res;
  42. # endif
  43. return INLINE_SYSCALL (tkill, 2, THREAD_GETMEM (THREAD_SELF, tid), sig);
  44. #endif
  45. }