putc.c 1.2 KB

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  1. /* Copyright (C) 1991-2019 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, see
  13. <http://www.gnu.org/licenses/>. */
  14. #include "libioP.h"
  15. #include "stdio.h"
  16. #undef _IO_putc
  17. int
  18. _IO_putc (int c, FILE *fp)
  19. {
  20. int result;
  21. CHECK_FILE (fp, EOF);
  22. if (!_IO_need_lock (fp))
  23. return _IO_putc_unlocked (c, fp);
  24. _IO_acquire_lock (fp);
  25. result = _IO_putc_unlocked (c, fp);
  26. _IO_release_lock (fp);
  27. return result;
  28. }
  29. libc_hidden_def (_IO_putc)
  30. #undef putc
  31. weak_alias (_IO_putc, putc)
  32. #ifndef _IO_MTSAFE_IO
  33. #undef putc_unlocked
  34. weak_alias (_IO_putc, putc_unlocked)
  35. #endif