1 | /* Definitions for POSIX 1003.1b-1993 (aka POSIX.4) scheduling interface. |
2 | Copyright (C) 1996-2018 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, see |
17 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | #ifndef _SCHED_H |
20 | #define _SCHED_H 1 |
21 | |
22 | #include <features.h> |
23 | |
24 | /* Get type definitions. */ |
25 | #include <bits/types.h> |
26 | |
27 | #define __need_size_t |
28 | #define __need_NULL |
29 | #include <stddef.h> |
30 | |
31 | #include <bits/types/time_t.h> |
32 | #include <bits/types/struct_timespec.h> |
33 | #ifndef __USE_XOPEN2K |
34 | # include <time.h> |
35 | #endif |
36 | |
37 | #ifndef __pid_t_defined |
38 | typedef __pid_t pid_t; |
39 | # define __pid_t_defined |
40 | #endif |
41 | |
42 | /* Get system specific constant and data structure definitions. */ |
43 | #include <bits/sched.h> |
44 | #include <bits/cpu-set.h> |
45 | |
46 | /* Backward compatibility. */ |
47 | #define sched_priority sched_priority |
48 | #define __sched_priority sched_priority |
49 | |
50 | |
51 | __BEGIN_DECLS |
52 | |
53 | /* Set scheduling parameters for a process. */ |
54 | extern int sched_setparam (__pid_t __pid, const struct sched_param *__param) |
55 | __THROW; |
56 | |
57 | /* Retrieve scheduling parameters for a particular process. */ |
58 | extern int sched_getparam (__pid_t __pid, struct sched_param *__param) __THROW; |
59 | |
60 | /* Set scheduling algorithm and/or parameters for a process. */ |
61 | extern int sched_setscheduler (__pid_t __pid, int __policy, |
62 | const struct sched_param *__param) __THROW; |
63 | |
64 | /* Retrieve scheduling algorithm for a particular purpose. */ |
65 | extern int sched_getscheduler (__pid_t __pid) __THROW; |
66 | |
67 | /* Yield the processor. */ |
68 | extern int sched_yield (void) __THROW; |
69 | |
70 | /* Get maximum priority value for a scheduler. */ |
71 | extern int sched_get_priority_max (int __algorithm) __THROW; |
72 | |
73 | /* Get minimum priority value for a scheduler. */ |
74 | extern int sched_get_priority_min (int __algorithm) __THROW; |
75 | |
76 | /* Get the SCHED_RR interval for the named process. */ |
77 | extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW; |
78 | |
79 | |
80 | #ifdef __USE_GNU |
81 | /* Access macros for `cpu_set'. */ |
82 | # define CPU_SETSIZE __CPU_SETSIZE |
83 | # define CPU_SET(cpu, cpusetp) __CPU_SET_S (cpu, sizeof (cpu_set_t), cpusetp) |
84 | # define CPU_CLR(cpu, cpusetp) __CPU_CLR_S (cpu, sizeof (cpu_set_t), cpusetp) |
85 | # define CPU_ISSET(cpu, cpusetp) __CPU_ISSET_S (cpu, sizeof (cpu_set_t), \ |
86 | cpusetp) |
87 | # define CPU_ZERO(cpusetp) __CPU_ZERO_S (sizeof (cpu_set_t), cpusetp) |
88 | # define CPU_COUNT(cpusetp) __CPU_COUNT_S (sizeof (cpu_set_t), cpusetp) |
89 | |
90 | # define CPU_SET_S(cpu, setsize, cpusetp) __CPU_SET_S (cpu, setsize, cpusetp) |
91 | # define CPU_CLR_S(cpu, setsize, cpusetp) __CPU_CLR_S (cpu, setsize, cpusetp) |
92 | # define CPU_ISSET_S(cpu, setsize, cpusetp) __CPU_ISSET_S (cpu, setsize, \ |
93 | cpusetp) |
94 | # define CPU_ZERO_S(setsize, cpusetp) __CPU_ZERO_S (setsize, cpusetp) |
95 | # define CPU_COUNT_S(setsize, cpusetp) __CPU_COUNT_S (setsize, cpusetp) |
96 | |
97 | # define CPU_EQUAL(cpusetp1, cpusetp2) \ |
98 | __CPU_EQUAL_S (sizeof (cpu_set_t), cpusetp1, cpusetp2) |
99 | # define CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ |
100 | __CPU_EQUAL_S (setsize, cpusetp1, cpusetp2) |
101 | |
102 | # define CPU_AND(destset, srcset1, srcset2) \ |
103 | __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, &) |
104 | # define CPU_OR(destset, srcset1, srcset2) \ |
105 | __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, |) |
106 | # define CPU_XOR(destset, srcset1, srcset2) \ |
107 | __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, ^) |
108 | # define CPU_AND_S(setsize, destset, srcset1, srcset2) \ |
109 | __CPU_OP_S (setsize, destset, srcset1, srcset2, &) |
110 | # define CPU_OR_S(setsize, destset, srcset1, srcset2) \ |
111 | __CPU_OP_S (setsize, destset, srcset1, srcset2, |) |
112 | # define CPU_XOR_S(setsize, destset, srcset1, srcset2) \ |
113 | __CPU_OP_S (setsize, destset, srcset1, srcset2, ^) |
114 | |
115 | # define CPU_ALLOC_SIZE(count) __CPU_ALLOC_SIZE (count) |
116 | # define CPU_ALLOC(count) __CPU_ALLOC (count) |
117 | # define CPU_FREE(cpuset) __CPU_FREE (cpuset) |
118 | |
119 | |
120 | /* Set the CPU affinity for a task */ |
121 | extern int sched_setaffinity (__pid_t __pid, size_t __cpusetsize, |
122 | const cpu_set_t *__cpuset) __THROW; |
123 | |
124 | /* Get the CPU affinity for a task */ |
125 | extern int sched_getaffinity (__pid_t __pid, size_t __cpusetsize, |
126 | cpu_set_t *__cpuset) __THROW; |
127 | #endif |
128 | |
129 | __END_DECLS |
130 | |
131 | #endif /* sched.h */ |
132 | |