| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Definitions for POSIX 1003.1b-1993 (aka POSIX.4) scheduling interface. |
| 2 | Copyright (C) 1996,1997,1999,2001-2004,2007 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, write to the Free |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 18 | 02111-1307 USA. */ |
| 19 | |
| 20 | #ifndef _SCHED_H |
| 21 | #define _SCHED_H 1 |
| 22 | |
| 23 | #include <features.h> |
| 24 | |
| 25 | /* Get type definitions. */ |
| 26 | #include <bits/types.h> |
| 27 | |
| 28 | #define __need_size_t |
| 29 | #include <stddef.h> |
| 30 | |
| 31 | #define __need_timespec |
| 32 | #include <time.h> |
| 33 | |
| 34 | /* Get system specific constant and data structure definitions. */ |
| 35 | #include <bits/sched.h> |
| 36 | /* Define the real names for the elements of `struct sched_param'. */ |
| 37 | #define sched_priority __sched_priority |
| 38 | |
| 39 | |
| 40 | __BEGIN_DECLS |
| 41 | |
| 42 | /* Set scheduling parameters for a process. */ |
| 43 | extern int sched_setparam (__pid_t __pid, __const struct sched_param *__param) |
| 44 | __THROW; |
| 45 | |
| 46 | /* Retrieve scheduling parameters for a particular process. */ |
| 47 | extern int sched_getparam (__pid_t __pid, struct sched_param *__param) __THROW; |
| 48 | |
| 49 | /* Set scheduling algorithm and/or parameters for a process. */ |
| 50 | extern int sched_setscheduler (__pid_t __pid, int __policy, |
| 51 | __const struct sched_param *__param) __THROW; |
| 52 | |
| 53 | /* Retrieve scheduling algorithm for a particular purpose. */ |
| 54 | extern int sched_getscheduler (__pid_t __pid) __THROW; |
| 55 | |
| 56 | /* Yield the processor. */ |
| 57 | extern int sched_yield (void) __THROW; |
| 58 | |
| 59 | /* Get maximum priority value for a scheduler. */ |
| 60 | extern int sched_get_priority_max (int __algorithm) __THROW; |
| 61 | |
| 62 | /* Get minimum priority value for a scheduler. */ |
| 63 | extern int sched_get_priority_min (int __algorithm) __THROW; |
| 64 | |
| 65 | /* Get the SCHED_RR interval for the named process. */ |
| 66 | extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW; |
| 67 | |
| 68 | |
| 69 | #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__ |
| 70 | /* Access macros for `cpu_set'. */ |
| 71 | # define CPU_SETSIZE __CPU_SETSIZE |
| 72 | # define CPU_SET(cpu, cpusetp) __CPU_SET_S (cpu, sizeof (cpu_set_t), cpusetp) |
| 73 | # define CPU_CLR(cpu, cpusetp) __CPU_CLR_S (cpu, sizeof (cpu_set_t), cpusetp) |
| 74 | # define CPU_ISSET(cpu, cpusetp) __CPU_ISSET_S (cpu, sizeof (cpu_set_t), \ |
| 75 | cpusetp) |
| 76 | # define CPU_ZERO(cpusetp) __CPU_ZERO_S (sizeof (cpu_set_t), cpusetp) |
| 77 | # define CPU_COUNT(cpusetp) __CPU_COUNT_S (sizeof (cpu_set_t), cpusetp) |
| 78 | |
| 79 | # define CPU_SET_S(cpu, setsize, cpusetp) __CPU_SET_S (cpu, setsize, cpusetp) |
| 80 | # define CPU_CLR_S(cpu, setsize, cpusetp) __CPU_CLR_S (cpu, setsize, cpusetp) |
| 81 | # define CPU_ISSET_S(cpu, setsize, cpusetp) __CPU_ISSET_S (cpu, setsize, \ |
| 82 | cpusetp) |
| 83 | # define CPU_ZERO_S(setsize, cpusetp) __CPU_ZERO_S (setsize, cpusetp) |
| 84 | # define CPU_COUNT_S(setsize, cpusetp) __CPU_COUNT_S (setsize, cpusetp) |
| 85 | |
| 86 | # define CPU_EQUAL(cpusetp1, cpusetp2) \ |
| 87 | __CPU_EQUAL_S (sizeof (cpu_set_t), cpusetp1, cpusetp2) |
| 88 | # define CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ |
| 89 | __CPU_EQUAL_S (setsize, cpusetp1, cpusetp2) |
| 90 | |
| 91 | # define CPU_AND(destset, srcset1, srcset2) \ |
| 92 | __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, &) |
| 93 | # define CPU_OR(destset, srcset1, srcset2) \ |
| 94 | __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, |) |
| 95 | # define CPU_XOR(destset, srcset1, srcset2) \ |
| 96 | __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, ^) |
| 97 | # define CPU_AND_S(setsize, destset, srcset1, srcset2) \ |
| 98 | __CPU_OP_S (setsize, destset, srcset1, srcset2, &) |
| 99 | # define CPU_OR_S(setsize, destset, srcset1, srcset2) \ |
| 100 | __CPU_OP_S (setsize, destset, srcset1, srcset2, |) |
| 101 | # define CPU_XOR_S(setsize, destset, srcset1, srcset2) \ |
| 102 | __CPU_OP_S (setsize, destset, srcset1, srcset2, ^) |
| 103 | |
| 104 | # define CPU_ALLOC_SIZE(count) __CPU_ALLOC_SIZE (count) |
| 105 | # define CPU_ALLOC(count) __CPU_ALLOC (count) |
| 106 | # define CPU_FREE(cpuset) __CPU_FREE (cpuset) |
| 107 | |
| 108 | |
| 109 | /* Set the CPU affinity for a task */ |
| 110 | extern int sched_setaffinity (__pid_t __pid, size_t __cpusetsize, |
| 111 | __const cpu_set_t *__cpuset) __THROW; |
| 112 | |
| 113 | /* Get the CPU affinity for a task */ |
| 114 | extern int sched_getaffinity (__pid_t __pid, size_t __cpusetsize, |
| 115 | cpu_set_t *__cpuset) __THROW; |
| 116 | #endif |
| 117 | |
| 118 | __END_DECLS |
| 119 | |
| 120 | #endif /* sched.h */ |