1 /* Definitions of constants and data structure for POSIX 1003.1b-1993 2 scheduling interface. 3 Copyright (C) 1996-1999,2001-2003,2005,2006,2007 4 Free Software Foundation, Inc. 5 This file is part of the GNU C Library. 6 7 The GNU C Library is free software; you can redistribute it and/or 8 modify it under the terms of the GNU Lesser General Public 9 License as published by the Free Software Foundation; either 10 version 2.1 of the License, or (at your option) any later version. 11 12 The GNU C Library is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 Lesser General Public License for more details. 16 17 You should have received a copy of the GNU Lesser General Public 18 License along with the GNU C Library; if not, write to the Free 19 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 20 02111-1307 USA. */ 21 22 #ifndef __need_schedparam 23 24 #ifndef _SCHED_H 25 # error "Never include <bits/sched.h> directly; use <sched.h> instead." 26 #endif 27 28 29 /* Scheduling algorithms. */ 30 #define SCHED_OTHER 0 31 #define SCHED_FIFO 1 32 #define SCHED_RR 2 33 #ifdef __USE_GNU 34 # define SCHED_BATCH 3 35 #endif 36 37 #ifdef __USE_MISC 38 /* Cloning flags. */ 39 # define CSIGNAL 0x000000ff /* Signal mask to be sent at exit. */ 40 # define CLONE_VM 0x00000100 /* Set if VM shared between processes. */ 41 # define CLONE_FS 0x00000200 /* Set if fs info shared between processes. */ 42 # define CLONE_FILES 0x00000400 /* Set if open files shared between processes. */ 43 # define CLONE_SIGHAND 0x00000800 /* Set if signal handlers shared. */ 44 # define CLONE_PTRACE 0x00002000 /* Set if tracing continues on the child. */ 45 # define CLONE_VFORK 0x00004000 /* Set if the parent wants the child to 46 wake it up on mm_release. */ 47 # define CLONE_PARENT 0x00008000 /* Set if we want to have the same 48 parent as the cloner. */ 49 # define CLONE_THREAD 0x00010000 /* Set to add to same thread group. */ 50 # define CLONE_NEWNS 0x00020000 /* Set to create new namespace. */ 51 # define CLONE_SYSVSEM 0x00040000 /* Set to shared SVID SEM_UNDO semantics. */ 52 # define CLONE_SETTLS 0x00080000 /* Set TLS info. */ 53 # define CLONE_PARENT_SETTID 0x00100000 /* Store TID in userlevel buffer 54 before MM copy. */ 55 # define CLONE_CHILD_CLEARTID 0x00200000 /* Register exit futex and memory 56 location to clear. */ 57 # define CLONE_DETACHED 0x00400000 /* Create clone detached. */ 58 # define CLONE_UNTRACED 0x00800000 /* Set if the tracing process can't 59 force CLONE_PTRACE on this clone. */ 60 # define CLONE_CHILD_SETTID 0x01000000 /* Store TID in userlevel buffer in 61 the child. */ 62 # define CLONE_STOPPED 0x02000000 /* Start in stopped state. */ 63 #endif 64 65 /* The official definition. */ 66 struct sched_param 67 { 68 int __sched_priority; 69 }; 70 71 __BEGIN_DECLS 72 73 #ifdef __USE_MISC 74 /* Clone current process. */ 75 extern int clone (int (*__fn) (void *__arg), void *__child_stack, 76 int __flags, void *__arg, ...) __THROW; 77 78 /* Unshare the specified resources. */ 79 extern int unshare (int __flags) __THROW; 80 81 /* Get index of currently used CPU. */ 82 extern int sched_getcpu (void) __THROW; 83 #endif 84 85 __END_DECLS 86 87 #endif /* need schedparam */ 88 89 #if !defined __defined_schedparam \ 90 && (defined __need_schedparam || defined _SCHED_H) 91 # define __defined_schedparam 1 92 /* Data structure to describe a process' schedulability. */ 93 struct __sched_param 94 { 95 int __sched_priority; 96 }; 97 # undef __need_schedparam 98 #endif 99 100 101 #if defined _SCHED_H && !defined __cpu_set_t_defined 102 # define __cpu_set_t_defined 103 /* Size definition for CPU sets. */ 104 # define __CPU_SETSIZE 1024 105 # define __NCPUBITS (8 * sizeof (__cpu_mask)) 106 107 /* Type for array elements in 'cpu_set_t'. */ 108 typedef unsigned long int __cpu_mask; 109 110 /* Basic access functions. */ 111 # define __CPUELT(cpu) ((cpu) / __NCPUBITS) 112 # define __CPUMASK(cpu) ((__cpu_mask) 1 << ((cpu) % __NCPUBITS)) 113 114 /* Data structure to describe CPU mask. */ 115 typedef struct 116 { 117 __cpu_mask __bits[__CPU_SETSIZE / __NCPUBITS]; 118 } cpu_set_t; 119 120 /* Access functions for CPU masks. */ 121 # if __GNUC_PREREQ (2, 91) 122 # define __CPU_ZERO_S(setsize, cpusetp) \ 123 do __builtin_memset (cpusetp, '\0', setsize); while (0) 124 # else 125 # define __CPU_ZERO_S(setsize, cpusetp) \ 126 do { \ 127 size_t __i; \ 128 size_t __imax = (setsize) / sizeof (__cpu_mask); \ 129 cpu_set_t *__arr = (cpusetp); \ 130 for (__i = 0; __i < __imax; ++__i) \ 131 __arr->__bits[__i] = 0; \ 132 } while (0) 133 # endif 134 # define __CPU_SET_S(cpu, setsize, cpusetp) \ 135 (__extension__ \ 136 ({ size_t __cpu = (cpu); \ 137 __cpu < 8 * (setsize) \ 138 ? ((cpusetp)->__bits[__CPUELT (__cpu)] |= __CPUMASK (__cpu)) : 0; })) 139 # define __CPU_CLR_S(cpu, setsize, cpusetp) \ 140 (__extension__ \ 141 ({ size_t __cpu = (cpu); \ 142 __cpu < 8 * (setsize) \ 143 ? ((cpusetp)->__bits[__CPUELT (__cpu)] &= ~__CPUMASK (__cpu)) : 0; })) 144 # define __CPU_ISSET_S(cpu, setsize, cpusetp) \ 145 (__extension__ \ 146 ({ size_t __cpu = (cpu); \ 147 __cpu < 8 * (setsize) \ 148 ? (((cpusetp)->__bits[__CPUELT (__cpu)] & __CPUMASK (__cpu))) != 0 \ 149 : 0; })) 150 151 # define __CPU_COUNT_S(setsize, cpusetp) \ 152 __sched_cpucount (setsize, cpusetp) 153 154 # if __GNUC_PREREQ (2, 91) 155 # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ 156 (__builtin_memcmp (cpusetp1, cpusetp2, setsize) == 0) 157 # else 158 # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ 159 (__extension__ \ 160 ({ cpu_set_t *__arr1 = (cpusetp1); \ 161 cpu_set_t *__arr2 = (cpusetp2); \ 162 size_t __imax = (setsize) / sizeof (__cpu_mask); \ 163 size_t __i; \ 164 for (__i = 0; __i < __imax; ++__i) \ 165 if (__arr1->__bits[__i] != __arr2->__bits[__i]) \ 166 break; \ 167 __i == __imax; })) 168 # endif 169 170 # define __CPU_OP_S(setsize, destset, srcset1, srcset2, op) \ 171 (__extension__ \ 172 ({ cpu_set_t *__dest = (destset); \ 173 cpu_set_t *__arr1 = (srcset1); \ 174 cpu_set_t *__arr2 = (srcset2); \ 175 size_t __imax = (setsize) / sizeof (__cpu_mask); \ 176 size_t __i; \ 177 for (__i = 0; __i < __imax; ++__i) \ 178 __dest->__bits[__i] = __arr1->__bits[__i] op __arr2->__bits[__i]; \ 179 __dest; })) 180 181 # define __CPU_ALLOC_SIZE(count) \ 182 ((((count) + __NCPUBITS - 1) / __NCPUBITS) * 8) 183 # define __CPU_ALLOC(count) __sched_cpualloc (count) 184 # define __CPU_FREE(cpuset) __sched_cpufree (cpuset) 185 186 __BEGIN_DECLS 187 188 extern int __sched_cpucount (size_t __setsize, const cpu_set_t *__setp) 189 __THROW; 190 extern cpu_set_t *__sched_cpualloc (size_t __count) __THROW __wur; 191 extern void __sched_cpufree (cpu_set_t *__set) __THROW; 192 193 __END_DECLS 194 195 #endif 196
