1 | /* Definitions for POSIX 1003.1b-1993 (aka POSIX.4) scheduling interface. |
2 | Copyright (C) 1996,1997,1999,2001-2004,2007,2010,2012 |
3 | Free Software Foundation, Inc. |
4 | This file is part of the GNU C Library. |
5 | |
6 | The GNU C Library is free software; you can redistribute it and/or |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either |
9 | version 2.1 of the License, or (at your option) any later version. |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | Lesser General Public License for more details. |
15 | |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ |
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_time_t |
32 | #define __need_timespec |
33 | #include <time.h> |
34 | |
35 | #ifndef __pid_t_defined |
36 | typedef __pid_t pid_t; |
37 | # define __pid_t_defined |
38 | #endif |
39 | |
40 | |
41 | /* Get system specific constant and data structure definitions. */ |
42 | #include <bits/sched.h> |
43 | /* Define the real names for the elements of `struct sched_param'. */ |
44 | #define sched_priority __sched_priority |
45 | |
46 | |
47 | __BEGIN_DECLS |
48 | |
49 | /* Set scheduling parameters for a process. */ |
50 | extern int sched_setparam (__pid_t __pid, const struct sched_param *__param) |
51 | __THROW; |
52 | |
53 | /* Retrieve scheduling parameters for a particular process. */ |
54 | extern int sched_getparam (__pid_t __pid, struct sched_param *__param) __THROW; |
55 | |
56 | /* Set scheduling algorithm and/or parameters for a process. */ |
57 | extern int sched_setscheduler (__pid_t __pid, int __policy, |
58 | const struct sched_param *__param) __THROW; |
59 | |
60 | /* Retrieve scheduling algorithm for a particular purpose. */ |
61 | extern int sched_getscheduler (__pid_t __pid) __THROW; |
62 | |
63 | /* Yield the processor. */ |
64 | extern int sched_yield (void) __THROW; |
65 | |
66 | /* Get maximum priority value for a scheduler. */ |
67 | extern int sched_get_priority_max (int __algorithm) __THROW; |
68 | |
69 | /* Get minimum priority value for a scheduler. */ |
70 | extern int sched_get_priority_min (int __algorithm) __THROW; |
71 | |
72 | /* Get the SCHED_RR interval for the named process. */ |
73 | extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW; |
74 | |
75 | |
76 | #ifdef __USE_GNU |
77 | /* Access macros for `cpu_set'. */ |
78 | # define CPU_SETSIZE __CPU_SETSIZE |
79 | # define CPU_SET(cpu, cpusetp) __CPU_SET_S (cpu, sizeof (cpu_set_t), cpusetp) |
80 | # define CPU_CLR(cpu, cpusetp) __CPU_CLR_S (cpu, sizeof (cpu_set_t), cpusetp) |
81 | # define CPU_ISSET(cpu, cpusetp) __CPU_ISSET_S (cpu, sizeof (cpu_set_t), \ |
82 | cpusetp) |
83 | # define CPU_ZERO(cpusetp) __CPU_ZERO_S (sizeof (cpu_set_t), cpusetp) |
84 | # define CPU_COUNT(cpusetp) __CPU_COUNT_S (sizeof (cpu_set_t), cpusetp) |
85 | |
86 | # define CPU_SET_S(cpu, setsize, cpusetp) __CPU_SET_S (cpu, setsize, cpusetp) |
87 | # define CPU_CLR_S(cpu, setsize, cpusetp) __CPU_CLR_S (cpu, setsize, cpusetp) |
88 | # define CPU_ISSET_S(cpu, setsize, cpusetp) __CPU_ISSET_S (cpu, setsize, \ |
89 | cpusetp) |
90 | # define CPU_ZERO_S(setsize, cpusetp) __CPU_ZERO_S (setsize, cpusetp) |
91 | # define CPU_COUNT_S(setsize, cpusetp) __CPU_COUNT_S (setsize, cpusetp) |
92 | |
93 | # define CPU_EQUAL(cpusetp1, cpusetp2) \ |
94 | __CPU_EQUAL_S (sizeof (cpu_set_t), cpusetp1, cpusetp2) |
95 | # define CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ |
96 | __CPU_EQUAL_S (setsize, cpusetp1, cpusetp2) |
97 | |
98 | # define CPU_AND(destset, srcset1, srcset2) \ |
99 | __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, &) |
100 | # define CPU_OR(destset, srcset1, srcset2) \ |
101 | __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, |) |
102 | # define CPU_XOR(destset, srcset1, srcset2) \ |
103 | __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, ^) |
104 | # define CPU_AND_S(setsize, destset, srcset1, srcset2) \ |
105 | __CPU_OP_S (setsize, destset, srcset1, srcset2, &) |
106 | # define CPU_OR_S(setsize, destset, srcset1, srcset2) \ |
107 | __CPU_OP_S (setsize, destset, srcset1, srcset2, |) |
108 | # define CPU_XOR_S(setsize, destset, srcset1, srcset2) \ |
109 | __CPU_OP_S (setsize, destset, srcset1, srcset2, ^) |
110 | |
111 | # define CPU_ALLOC_SIZE(count) __CPU_ALLOC_SIZE (count) |
112 | # define CPU_ALLOC(count) __CPU_ALLOC (count) |
113 | # define CPU_FREE(cpuset) __CPU_FREE (cpuset) |
114 | |
115 | |
116 | /* Set the CPU affinity for a task */ |
117 | extern int sched_setaffinity (__pid_t __pid, size_t __cpusetsize, |
118 | const cpu_set_t *__cpuset) __THROW; |
119 | |
120 | /* Get the CPU affinity for a task */ |
121 | extern int sched_getaffinity (__pid_t __pid, size_t __cpusetsize, |
122 | cpu_set_t *__cpuset) __THROW; |
123 | #endif |
124 | |
125 | __END_DECLS |
126 | |
127 | #endif /* sched.h */ |
128 | |