src/system/libroot/posix/scheduler.cpp

   1 /*
   2  * Copyright 2009, Michael Franz
   3  * Copyright 2008, Andreas Färber, andreas.faerber@web.de
   4  * Distributed under the terms of the MIT license.
   5  */
   6
   7
   8 #include <errno.h>
   9 #include <sched.h>
  10
  11 #include <OS.h>
  12
  13 #include <errno_private.h>
  14 #include <syscalls.h>
  15
  16
  17 int
  18 sched_yield(void)
  19 {
  20         _kern_thread_yield();
  21         return 0;
  22 }
  23
  24
  25 int
  26 sched_get_priority_min(int policy)
  27 {
  28         switch (policy) {
  29                 case SCHED_RR:
  30                         return B_FIRST_REAL_TIME_PRIORITY;
  31
  32                 case SCHED_OTHER:
  33                         return B_LOW_PRIORITY;
  34
  35                 default:
  36                         __set_errno(EINVAL);
  37                         return -1;
  38         }
  39 }
  40
  41
  42 int
  43 sched_get_priority_max(int policy)
  44 {
  45         switch (policy) {
  46                 case SCHED_RR:
  47                         return B_REAL_TIME_PRIORITY;
  48
  49                 case SCHED_OTHER:
  50                         return B_URGENT_DISPLAY_PRIORITY;
  51
  52                 default:
  53                         __set_errno(EINVAL);
  54                         return -1;
  55         }
  56 }