sched_getprioritymin.c 2.8 KB

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  1. /****************************************************************************
  2. * libs/libc/sched/sched_getprioritymin.c
  3. *
  4. * Copyright (C) 2007, 2009, 2011, 2015 Gregory Nutt. All rights reserved.
  5. * Author: Gregory Nutt <gnutt@nuttx.org>
  6. *
  7. * Redistribution and use in source and binary forms, with or without
  8. * modification, are permitted provided that the following conditions
  9. * are met:
  10. *
  11. * 1. Redistributions of source code must retain the above copyright
  12. * notice, this list of conditions and the following disclaimer.
  13. * 2. Redistributions in binary form must reproduce the above copyright
  14. * notice, this list of conditions and the following disclaimer in
  15. * the documentation and/or other materials provided with the
  16. * distribution.
  17. * 3. Neither the name NuttX nor the names of its contributors may be
  18. * used to endorse or promote products derived from this software
  19. * without specific prior written permission.
  20. *
  21. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24. * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  25. * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26. * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27. * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
  28. * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29. * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  31. * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  32. * POSSIBILITY OF SUCH DAMAGE.
  33. *
  34. ****************************************************************************/
  35. /****************************************************************************
  36. * Included Files
  37. ****************************************************************************/
  38. #include <nuttx/config.h>
  39. #include <assert.h>
  40. #include <nuttx/arch.h>
  41. /****************************************************************************
  42. * Public Functions
  43. ****************************************************************************/
  44. /****************************************************************************
  45. * Name: sched_get_priority_min
  46. *
  47. * Description:
  48. * This function returns the value of the lowest possible
  49. * task priority for a specified scheduling policy.
  50. *
  51. * Input Parameters:
  52. * policy - Scheduling policy requested.
  53. *
  54. * Returned Value:
  55. * The minimum priority value or -1 (ERROR)
  56. * (errno is not set)
  57. *
  58. * Assumptions:
  59. *
  60. ****************************************************************************/
  61. int sched_get_priority_min(int policy)
  62. {
  63. DEBUGASSERT(policy >= SCHED_FIFO && policy <= SCHED_OTHER);
  64. return SCHED_PRIORITY_MIN;
  65. }