Fix up sched.h for XPG7.
[glibc.git] / posix / sched.h
blob55bc487b3728bfce209d2a88c1a7a8755d23d53c
1 /* Definitions for POSIX 1003.1b-1993 (aka POSIX.4) scheduling interface.
2 Copyright (C) 1996,1997,1999,2001-2004,2007,2010
3 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
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.
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.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
21 #ifndef _SCHED_H
22 #define _SCHED_H 1
24 #include <features.h>
26 /* Get type definitions. */
27 #include <bits/types.h>
29 #define __need_size_t
30 #include <stddef.h>
32 #define __need_time_t
33 #define __need_timespec
34 #include <time.h>
36 #ifndef __pid_t_defined
37 typedef __pid_t pid_t;
38 # define __pid_t_defined
39 #endif
42 /* Get system specific constant and data structure definitions. */
43 #include <bits/sched.h>
44 /* Define the real names for the elements of `struct sched_param'. */
45 #define sched_priority __sched_priority
48 __BEGIN_DECLS
50 /* Set scheduling parameters for a process. */
51 extern int sched_setparam (__pid_t __pid, __const struct sched_param *__param)
52 __THROW;
54 /* Retrieve scheduling parameters for a particular process. */
55 extern int sched_getparam (__pid_t __pid, struct sched_param *__param) __THROW;
57 /* Set scheduling algorithm and/or parameters for a process. */
58 extern int sched_setscheduler (__pid_t __pid, int __policy,
59 __const struct sched_param *__param) __THROW;
61 /* Retrieve scheduling algorithm for a particular purpose. */
62 extern int sched_getscheduler (__pid_t __pid) __THROW;
64 /* Yield the processor. */
65 extern int sched_yield (void) __THROW;
67 /* Get maximum priority value for a scheduler. */
68 extern int sched_get_priority_max (int __algorithm) __THROW;
70 /* Get minimum priority value for a scheduler. */
71 extern int sched_get_priority_min (int __algorithm) __THROW;
73 /* Get the SCHED_RR interval for the named process. */
74 extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW;
77 #ifdef __USE_GNU
78 /* Access macros for `cpu_set'. */
79 # define CPU_SETSIZE __CPU_SETSIZE
80 # define CPU_SET(cpu, cpusetp) __CPU_SET_S (cpu, sizeof (cpu_set_t), cpusetp)
81 # define CPU_CLR(cpu, cpusetp) __CPU_CLR_S (cpu, sizeof (cpu_set_t), cpusetp)
82 # define CPU_ISSET(cpu, cpusetp) __CPU_ISSET_S (cpu, sizeof (cpu_set_t), \
83 cpusetp)
84 # define CPU_ZERO(cpusetp) __CPU_ZERO_S (sizeof (cpu_set_t), cpusetp)
85 # define CPU_COUNT(cpusetp) __CPU_COUNT_S (sizeof (cpu_set_t), cpusetp)
87 # define CPU_SET_S(cpu, setsize, cpusetp) __CPU_SET_S (cpu, setsize, cpusetp)
88 # define CPU_CLR_S(cpu, setsize, cpusetp) __CPU_CLR_S (cpu, setsize, cpusetp)
89 # define CPU_ISSET_S(cpu, setsize, cpusetp) __CPU_ISSET_S (cpu, setsize, \
90 cpusetp)
91 # define CPU_ZERO_S(setsize, cpusetp) __CPU_ZERO_S (setsize, cpusetp)
92 # define CPU_COUNT_S(setsize, cpusetp) __CPU_COUNT_S (setsize, cpusetp)
94 # define CPU_EQUAL(cpusetp1, cpusetp2) \
95 __CPU_EQUAL_S (sizeof (cpu_set_t), cpusetp1, cpusetp2)
96 # define CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \
97 __CPU_EQUAL_S (setsize, cpusetp1, cpusetp2)
99 # define CPU_AND(destset, srcset1, srcset2) \
100 __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, &)
101 # define CPU_OR(destset, srcset1, srcset2) \
102 __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, |)
103 # define CPU_XOR(destset, srcset1, srcset2) \
104 __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, ^)
105 # define CPU_AND_S(setsize, destset, srcset1, srcset2) \
106 __CPU_OP_S (setsize, destset, srcset1, srcset2, &)
107 # define CPU_OR_S(setsize, destset, srcset1, srcset2) \
108 __CPU_OP_S (setsize, destset, srcset1, srcset2, |)
109 # define CPU_XOR_S(setsize, destset, srcset1, srcset2) \
110 __CPU_OP_S (setsize, destset, srcset1, srcset2, ^)
112 # define CPU_ALLOC_SIZE(count) __CPU_ALLOC_SIZE (count)
113 # define CPU_ALLOC(count) __CPU_ALLOC (count)
114 # define CPU_FREE(cpuset) __CPU_FREE (cpuset)
117 /* Set the CPU affinity for a task */
118 extern int sched_setaffinity (__pid_t __pid, size_t __cpusetsize,
119 __const cpu_set_t *__cpuset) __THROW;
121 /* Get the CPU affinity for a task */
122 extern int sched_getaffinity (__pid_t __pid, size_t __cpusetsize,
123 cpu_set_t *__cpuset) __THROW;
124 #endif
126 __END_DECLS
128 #endif /* sched.h */