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sched.h
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/* Definitions for POSIX 1003.1b-1993 (aka POSIX.4) scheduling interface. Copyright (C) 1996-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _SCHED_H #define _SCHED_H 1 #include <features.h> /* Get type definitions. */ #include <bits/types.h> #define __need_size_t #define __need_NULL #include <stddef.h> #include <bits/types/time_t.h> #include <bits/types/struct_timespec.h> #ifndef __USE_XOPEN2K # include <time.h> #endif #ifndef __pid_t_defined typedef __pid_t pid_t; # define __pid_t_defined #endif /* Get system specific constant and data structure definitions. */ #include <bits/sched.h> #include <bits/cpu-set.h> /* Backward compatibility. */ #define sched_priority sched_priority #define __sched_priority sched_priority __BEGIN_DECLS /* Set scheduling parameters for a process. */ extern int sched_setparam (__pid_t __pid, const struct sched_param *__param) __THROW; /* Retrieve scheduling parameters for a particular process. */ extern int sched_getparam (__pid_t __pid, struct sched_param *__param) __THROW; /* Set scheduling algorithm and/or parameters for a process. */ extern int sched_setscheduler (__pid_t __pid, int __policy, const struct sched_param *__param) __THROW; /* Retrieve scheduling algorithm for a particular purpose. */ extern int sched_getscheduler (__pid_t __pid) __THROW; /* Yield the processor. */ extern int sched_yield (void) __THROW; /* Get maximum priority value for a scheduler. */ extern int sched_get_priority_max (int __algorithm) __THROW; /* Get minimum priority value for a scheduler. */ extern int sched_get_priority_min (int __algorithm) __THROW; /* Get the SCHED_RR interval for the named process. */ extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW; #ifdef __USE_GNU /* Access macros for `cpu_set'. */ # define CPU_SETSIZE __CPU_SETSIZE # define CPU_SET(cpu, cpusetp) __CPU_SET_S (cpu, sizeof (cpu_set_t), cpusetp) # define CPU_CLR(cpu, cpusetp) __CPU_CLR_S (cpu, sizeof (cpu_set_t), cpusetp) # define CPU_ISSET(cpu, cpusetp) __CPU_ISSET_S (cpu, sizeof (cpu_set_t), \ cpusetp) # define CPU_ZERO(cpusetp) __CPU_ZERO_S (sizeof (cpu_set_t), cpusetp) # define CPU_COUNT(cpusetp) __CPU_COUNT_S (sizeof (cpu_set_t), cpusetp) # define CPU_SET_S(cpu, setsize, cpusetp) __CPU_SET_S (cpu, setsize, cpusetp) # define CPU_CLR_S(cpu, setsize, cpusetp) __CPU_CLR_S (cpu, setsize, cpusetp) # define CPU_ISSET_S(cpu, setsize, cpusetp) __CPU_ISSET_S (cpu, setsize, \ cpusetp) # define CPU_ZERO_S(setsize, cpusetp) __CPU_ZERO_S (setsize, cpusetp) # define CPU_COUNT_S(setsize, cpusetp) __CPU_COUNT_S (setsize, cpusetp) # define CPU_EQUAL(cpusetp1, cpusetp2) \ __CPU_EQUAL_S (sizeof (cpu_set_t), cpusetp1, cpusetp2) # define CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ __CPU_EQUAL_S (setsize, cpusetp1, cpusetp2) # define CPU_AND(destset, srcset1, srcset2) \ __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, &) # define CPU_OR(destset, srcset1, srcset2) \ __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, |) # define CPU_XOR(destset, srcset1, srcset2) \ __CPU_OP_S (sizeof (cpu_set_t), destset, srcset1, srcset2, ^) # define CPU_AND_S(setsize, destset, srcset1, srcset2) \ __CPU_OP_S (setsize, destset, srcset1, srcset2, &) # define CPU_OR_S(setsize, destset, srcset1, srcset2) \ __CPU_OP_S (setsize, destset, srcset1, srcset2, |) # define CPU_XOR_S(setsize, destset, srcset1, srcset2) \ __CPU_OP_S (setsize, destset, srcset1, srcset2, ^) # define CPU_ALLOC_SIZE(count) __CPU_ALLOC_SIZE (count) # define CPU_ALLOC(count) __CPU_ALLOC (count) # define CPU_FREE(cpuset) __CPU_FREE (cpuset) /* Set the CPU affinity for a task */ extern int sched_setaffinity (__pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset) __THROW; /* Get the CPU affinity for a task */ extern int sched_getaffinity (__pid_t __pid, size_t __cpusetsize, cpu_set_t *__cpuset) __THROW; #endif __END_DECLS #endif /* sched.h */