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 <syscalls.h> 14 15 16 int 17 sched_yield(void) 18 { 19 _kern_thread_yield(); 20 return 0; 21 } 22 23 24 int 25 sched_get_priority_min(int policy) 26 { 27 switch (policy) { 28 case SCHED_FIFO: 29 case SCHED_RR: 30 case SCHED_SPORADIC: 31 case SCHED_OTHER: 32 return B_LOW_PRIORITY; 33 34 default: 35 errno = EINVAL; 36 return -1; 37 } 38 } 39 40 41 int 42 sched_get_priority_max(int policy) 43 { 44 switch (policy) { 45 case SCHED_FIFO: 46 case SCHED_RR: 47 case SCHED_SPORADIC: 48 case SCHED_OTHER: 49 return B_URGENT_DISPLAY_PRIORITY; 50 51 default: 52 errno = EINVAL; 53 return -1; 54 } 55 } 56