sched_yield.c 2.5 KB

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  1. /*
  2. * sched_yield.c
  3. *
  4. * Description:
  5. * POSIX thread functions that deal with thread scheduling.
  6. *
  7. * --------------------------------------------------------------------------
  8. *
  9. * Pthreads-win32 - POSIX Threads Library for Win32
  10. * Copyright(C) 1998 John E. Bossom
  11. * Copyright(C) 1999,2005 Pthreads-win32 contributors
  12. *
  13. * Contact Email: [email protected]
  14. *
  15. * The current list of contributors is contained
  16. * in the file CONTRIBUTORS included with the source
  17. * code distribution. The list can also be seen at the
  18. * following World Wide Web location:
  19. * http://sources.redhat.com/pthreads-win32/contributors.html
  20. *
  21. * This library is free software; you can redistribute it and/or
  22. * modify it under the terms of the GNU Lesser General Public
  23. * License as published by the Free Software Foundation; either
  24. * version 2 of the License, or (at your option) any later version.
  25. *
  26. * This library is distributed in the hope that it will be useful,
  27. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  28. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  29. * Lesser General Public License for more details.
  30. *
  31. * You should have received a copy of the GNU Lesser General Public
  32. * License along with this library in the file COPYING.LIB;
  33. * if not, write to the Free Software Foundation, Inc.,
  34. * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  35. */
  36. #include "pthread.h"
  37. #include "implement.h"
  38. #include "sched.h"
  39. int
  40. sched_yield (void)
  41. /*
  42. * ------------------------------------------------------
  43. * DOCPUBLIC
  44. * This function indicates that the calling thread is
  45. * willing to give up some time slices to other threads.
  46. *
  47. * PARAMETERS
  48. * N/A
  49. *
  50. *
  51. * DESCRIPTION
  52. * This function indicates that the calling thread is
  53. * willing to give up some time slices to other threads.
  54. * NOTE: Since this is part of POSIX 1003.1b
  55. * (realtime extensions), it is defined as returning
  56. * -1 if an error occurs and sets errno to the actual
  57. * error.
  58. *
  59. * RESULTS
  60. * 0 successfully created semaphore,
  61. * ENOSYS sched_yield not supported,
  62. *
  63. * ------------------------------------------------------
  64. */
  65. {
  66. Sleep (0);
  67. return 0;
  68. }