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. 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_timespec 29#include <time.h> 30 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 35 36 37__BEGIN_DECLS 38 39/* Set scheduling parameters for a process. */ 40extern int sched_setparam (__pid_t __pid, __const struct sched_param *__param) 41 __THROW; 42 43/* Retrieve scheduling parameters for a particular process. */ 44extern int sched_getparam (__pid_t __pid, struct sched_param *__param) __THROW; 45 46/* Set scheduling algorithm and/or parameters for a process. */ 47extern int sched_setscheduler (__pid_t __pid, int __policy, 48 __const struct sched_param *__param) __THROW; 49 50/* Retrieve scheduling algorithm for a particular purpose. */ 51extern int sched_getscheduler (__pid_t __pid) __THROW; 52 53/* Yield the processor. */ 54extern int sched_yield (void) __THROW; 55 56/* Get maximum priority value for a scheduler. */ 57extern int sched_get_priority_max (int __algorithm) __THROW; 58 59/* Get minimum priority value for a scheduler. */ 60extern int sched_get_priority_min (int __algorithm) __THROW; 61 62/* Get the SCHED_RR interval for the named process. */ 63extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW; 64 65 66#if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__ 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) 73 74 75/* Set the CPU affinity for a task */ 76extern int sched_setaffinity (__pid_t __pid, size_t __cpusetsize, 77 __const cpu_set_t *__cpuset) __THROW; 78 79/* Get the CPU affinity for a task */ 80extern int sched_getaffinity (__pid_t __pid, size_t __cpusetsize, 81 cpu_set_t *__cpuset) __THROW; 82 83extern int __clone (int (*__fn) (void *__arg), void *__child_stack, 84 int __flags, void *__arg, ...); 85extern int __clone2 (int (*__fn) (void *__arg), void *__child_stack_base, 86 size_t __child_stack_size, int __flags, void *__arg, ...); 87 88#endif 89 90__END_DECLS 91 92#endif /* sched.h */ 93