Update.
[glibc.git] / posix / sched.h
blob7cfdbf1f96813f760c05e3c0eca79755666eea66
1 /* Definitions for POSIX 1003.1b-1993 (aka POSIX.4) scheduling interface.
2 Copyright (C) 1996,1997,1999,2001-2003,2004 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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. */
20 #ifndef _SCHED_H
21 #define _SCHED_H 1
23 #include <features.h>
25 /* Get type definitions. */
26 #include <bits/types.h>
28 #define __need_timespec
29 #include <time.h>
31 /* Get system specific constant and data structure definitions. */
32 #include <bits/sched.h>
33 /* Define the real names for the elements of `struct sched_param'. */
34 #define sched_priority __sched_priority
37 __BEGIN_DECLS
39 /* Set scheduling parameters for a process. */
40 extern int sched_setparam (__pid_t __pid, __const struct sched_param *__param)
41 __THROW;
43 /* Retrieve scheduling parameters for a particular process. */
44 extern int sched_getparam (__pid_t __pid, struct sched_param *__param) __THROW;
46 /* Set scheduling algorithm and/or parameters for a process. */
47 extern int sched_setscheduler (__pid_t __pid, int __policy,
48 __const struct sched_param *__param) __THROW;
50 /* Retrieve scheduling algorithm for a particular purpose. */
51 extern int sched_getscheduler (__pid_t __pid) __THROW;
53 /* Yield the processor. */
54 extern int sched_yield (void) __THROW;
56 /* Get maximum priority value for a scheduler. */
57 extern int sched_get_priority_max (int __algorithm) __THROW;
59 /* Get minimum priority value for a scheduler. */
60 extern int sched_get_priority_min (int __algorithm) __THROW;
62 /* Get the SCHED_RR interval for the named process. */
63 extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW;
66 #ifdef __USE_GNU
67 /* Access macros for `cpu_set'. */
68 #define CPU_SETSIZE __CPU_SETSIZE
69 #define CPU_SET(cpu, cpusetp) __CPU_SET (cpu, cpusetp)
70 #define CPU_CLR(cpu, cpusetp) __CPU_CLR (cpu, cpusetp)
71 #define CPU_ISSET(cpu, cpusetp) __CPU_ISSET (cpu, cpusetp)
72 #define CPU_ZERO(cpusetp) __CPU_ZERO (cpusetp)
75 /* Set the CPU affinity for a task */
76 extern int sched_setaffinity (__pid_t __pid, size_t __cpusetsize,
77 __const cpu_set_t *__cpuset) __THROW;
79 /* Get the CPU affinity for a task */
80 extern int sched_getaffinity (__pid_t __pid, size_t __cpusetsize,
81 cpu_set_t *__cpuset) __THROW;
82 #endif
84 __END_DECLS
86 #endif /* sched.h */