| 1 | /* Definitions for POSIX 1003.1b-1993 (aka POSIX.4) scheduling interface. |
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| 2 | Copyright (C) 1996,1997,1999,2001-2004,2007 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, write to the Free |
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| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 18 | 02111-1307 USA. */ |
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| 19 | |
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| 20 | #ifndef _SCHED_H |
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| 21 | #define _SCHED_H 1 |
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| 22 | |
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| 23 | #include <features.h> |
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| 24 | |
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| 25 | #define __need_size_t |
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| 26 | #include <stddef.h> |
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| 27 | |
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| 28 | /* Get type definitions. */ |
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| 29 | #include <bits/types.h> |
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| 30 | |
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| 31 | #define __need_timespec |
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| 32 | #include <time.h> |
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| 33 | |
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| 34 | /* Get system specific constant and data structure definitions. */ |
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| 35 | #include <bits/sched.h> |
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| 36 | /* Define the real names for the elements of `struct sched_param'. */ |
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| 37 | #define sched_priority __sched_priority |
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| 38 | |
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| 39 | |
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| 40 | __BEGIN_DECLS |
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| 41 | |
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| 42 | /* Set scheduling parameters for a process. */ |
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| 43 | extern int sched_setparam (__pid_t __pid, __const struct sched_param *__param) |
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| 44 | __THROW; |
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| 45 | |
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| 46 | /* Retrieve scheduling parameters for a particular process. */ |
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| 47 | extern int sched_getparam (__pid_t __pid, struct sched_param *__param) __THROW; |
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| 48 | |
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| 49 | /* Set scheduling algorithm and/or parameters for a process. */ |
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| 50 | extern int sched_setscheduler (__pid_t __pid, int __policy, |
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| 51 | __const struct sched_param *__param) __THROW; |
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| 52 | |
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| 53 | /* Retrieve scheduling algorithm for a particular purpose. */ |
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| 54 | extern int sched_getscheduler (__pid_t __pid) __THROW; |
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| 55 | |
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| 56 | /* Yield the processor. */ |
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| 57 | extern int sched_yield (void) __THROW; |
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| 58 | |
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| 59 | /* Get maximum priority value for a scheduler. */ |
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| 60 | extern int sched_get_priority_max (int __algorithm) __THROW; |
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| 61 | |
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| 62 | /* Get minimum priority value for a scheduler. */ |
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| 63 | extern int sched_get_priority_min (int __algorithm) __THROW; |
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| 64 | |
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| 65 | /* Get the SCHED_RR interval for the named process. */ |
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| 66 | extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW; |
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| 67 | |
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| 68 | |
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| 69 | #ifdef __USE_GNU |
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| 70 | /* Access macros for `cpu_set'. */ |
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| 71 | # define CPU_SETSIZE __CPU_SETSIZE |
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| 72 | # define CPU_SET(cpu, cpusetp) __CPU_SET (cpu, cpusetp) |
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| 73 | # define CPU_CLR(cpu, cpusetp) __CPU_CLR (cpu, cpusetp) |
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| 74 | # define CPU_ISSET(cpu, cpusetp) __CPU_ISSET (cpu, cpusetp) |
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| 75 | # define CPU_ZERO(cpusetp) __CPU_ZERO (cpusetp) |
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| 76 | # define CPU_COUNT(cpusetp) __CPU_COUNT (cpusetp) |
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| 77 | |
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| 78 | |
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| 79 | /* Set the CPU affinity for a task */ |
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| 80 | extern int sched_setaffinity (__pid_t __pid, size_t __cpusetsize, |
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| 81 | __const cpu_set_t *__cpuset) __THROW; |
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| 82 | |
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| 83 | /* Get the CPU affinity for a task */ |
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| 84 | extern int sched_getaffinity (__pid_t __pid, size_t __cpusetsize, |
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| 85 | cpu_set_t *__cpuset) __THROW; |
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| 86 | #endif |
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| 87 | |
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| 88 | __END_DECLS |
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| 89 | |
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| 90 | #endif /* sched.h */ |
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