tst-sem1.c 2.0 KB

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  1. /* Copyright (C) 2002 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 <semaphore.h>
  18. #include <stdio.h>
  19. #include <unistd.h>
  20. static int
  21. do_test (void)
  22. {
  23. sem_t s;
  24. if (sem_init (&s, 0, 1) == -1)
  25. {
  26. puts ("init failed");
  27. return 1;
  28. }
  29. if (TEMP_FAILURE_RETRY (sem_wait (&s)) == -1)
  30. {
  31. puts ("1st wait failed");
  32. return 1;
  33. }
  34. if (sem_post (&s) == -1)
  35. {
  36. puts ("1st post failed");
  37. return 1;
  38. }
  39. if (TEMP_FAILURE_RETRY (sem_trywait (&s)) == -1)
  40. {
  41. puts ("1st trywait failed");
  42. return 1;
  43. }
  44. errno = 0;
  45. if (TEMP_FAILURE_RETRY (sem_trywait (&s)) != -1)
  46. {
  47. puts ("2nd trywait succeeded");
  48. return 1;
  49. }
  50. else if (errno != EAGAIN)
  51. {
  52. puts ("2nd trywait did not set errno to EAGAIN");
  53. return 1;
  54. }
  55. if (sem_post (&s) == -1)
  56. {
  57. puts ("2nd post failed");
  58. return 1;
  59. }
  60. if (TEMP_FAILURE_RETRY (sem_wait (&s)) == -1)
  61. {
  62. puts ("2nd wait failed");
  63. return 1;
  64. }
  65. if (sem_destroy (&s) == -1)
  66. {
  67. puts ("destroy failed");
  68. return 1;
  69. }
  70. return 0;
  71. }
  72. #define TEST_FUNCTION do_test ()
  73. #include "../test-skeleton.c"