pthread_spin_trylock.S 1.1 KB

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  1. /* Copyright (C) 2003 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 <pthread-errnos.h>
  16. .globl pthread_spin_trylock
  17. .type pthread_spin_trylock,@function
  18. .align 5
  19. pthread_spin_trylock:
  20. tas.b @r4
  21. bf/s 1f
  22. mov #EBUSY, r0
  23. mov #0, r0
  24. 1:
  25. rts
  26. nop
  27. .size pthread_spin_trylock,.-pthread_spin_trylock