1 /* Definitions of constants and data structure for POSIX 1003.1b-1993 2 scheduling interface. 3 Copyright (C) 1996-1999,2001-2003,2005,2006,2007,2008,2009,2011 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 # define SCHED_IDLE 5 36 37 # define SCHED_RESET_ON_FORK 0x40000000 38 #endif 39 40 #ifdef __USE_GNU 41 /* Cloning flags. */ 42 # define CSIGNAL 0x000000ff /* Signal mask to be sent at exit. */ 43 # define CLONE_VM 0x00000100 /* Set if VM shared between processes. */ 44 # define CLONE_FS 0x00000200 /* Set if fs info shared between processes. */ 45 # define CLONE_FILES 0x00000400 /* Set if open files shared between processes. */ 46 # define CLONE_SIGHAND 0x00000800 /* Set if signal handlers shared. */ 47 # define CLONE_PTRACE 0x00002000 /* Set if tracing continues on the child. */ 48 # define CLONE_VFORK 0x00004000 /* Set if the parent wants the child to 49 wake it up on mm_release. */ 50 # define CLONE_PARENT 0x00008000 /* Set if we want to have the same 51 parent as the cloner. */ 52 # define CLONE_THREAD 0x00010000 /* Set to add to same thread group. */ 53 # define CLONE_NEWNS 0x00020000 /* Set to create new namespace. */ 54 # define CLONE_SYSVSEM 0x00040000 /* Set to shared SVID SEM_UNDO semantics. */ 55 # define CLONE_SETTLS 0x00080000 /* Set TLS info. */ 56 # define CLONE_PARENT_SETTID 0x00100000 /* Store TID in userlevel buffer 57 before MM copy. */ 58 # define CLONE_CHILD_CLEARTID 0x00200000 /* Register exit futex and memory 59 location to clear. */ 60 # define CLONE_DETACHED 0x00400000 /* Create clone detached. */ 61 # define CLONE_UNTRACED 0x00800000 /* Set if the tracing process can't 62 force CLONE_PTRACE on this clone. */ 63 # define CLONE_CHILD_SETTID 0x01000000 /* Store TID in userlevel buffer in 64 the child. */ 65 # define CLONE_NEWUTS 0x04000000 /* New utsname group. */ 66 # define CLONE_NEWIPC 0x08000000 /* New ipcs. */ 67 # define CLONE_NEWUSER 0x10000000 /* New user namespace. */ 68 # define CLONE_NEWPID 0x20000000 /* New pid namespace. */ 69 # define CLONE_NEWNET 0x40000000 /* New network namespace. */ 70 # define CLONE_IO 0x80000000 /* Clone I/O context. */ 71 #endif 72 73 /* The official definition. */ 74 struct sched_param 75 { 76 int __sched_priority; 77 }; 78 79 __BEGIN_DECLS 80 81 #ifdef __USE_GNU 82 /* Clone current process. */ 83 extern int clone (int (*__fn) (void *__arg), void *__child_stack, 84 int __flags, void *__arg, ...) __THROW; 85 86 /* Unshare the specified resources. */ 87 extern int unshare (int __flags) __THROW; 88 89 /* Get index of currently used CPU. */ 90 extern int sched_getcpu (void) __THROW; 91 92 /* Switch process to namespace of type NSTYPE indicated by FD. */ 93 extern int setns (int __fd, int __nstype) __THROW; 94 #endif 95 96 97 __END_DECLS 98 99 #endif /* need schedparam */ 100 101 #if !defined __defined_schedparam \ 102 && (defined __need_schedparam || defined _SCHED_H) 103 # define __defined_schedparam 1 104 /* Data structure to describe a process' schedulability. */ 105 struct __sched_param 106 { 107 int __sched_priority; 108 }; 109 # undef __need_schedparam 110 #endif 111 112 113 #if defined _SCHED_H && !defined __cpu_set_t_defined 114 # define __cpu_set_t_defined 115 /* Size definition for CPU sets. */ 116 # define __CPU_SETSIZE 1024 117 # define __NCPUBITS (8 * sizeof (__cpu_mask)) 118 119 /* Type for array elements in 'cpu_set_t'. */ 120 typedef unsigned long int __cpu_mask; 121 122 /* Basic access functions. */ 123 # define __CPUELT(cpu) ((cpu) / __NCPUBITS) 124 # define __CPUMASK(cpu) ((__cpu_mask) 1 << ((cpu) % __NCPUBITS)) 125 126 /* Data structure to describe CPU mask. */ 127 typedef struct 128 { 129 __cpu_mask __bits[__CPU_SETSIZE / __NCPUBITS]; 130 } cpu_set_t; 131 132 /* Access functions for CPU masks. */ 133 # if __GNUC_PREREQ (2, 91) 134 # define __CPU_ZERO_S(setsize, cpusetp) \ 135 do __builtin_memset (cpusetp, '\0', setsize); while (0) 136 # else 137 # define __CPU_ZERO_S(setsize, cpusetp) \ 138 do { \ 139 size_t __i; \ 140 size_t __imax = (setsize) / sizeof (__cpu_mask); \ 141 __cpu_mask *__bits = (cpusetp)->__bits; \ 142 for (__i = 0; __i < __imax; ++__i) \ 143 __bits[__i] = 0; \ 144 } while (0) 145 # endif 146 # define __CPU_SET_S(cpu, setsize, cpusetp) \ 147 (__extension__ \ 148 ({ size_t __cpu = (cpu); \ 149 __cpu < 8 * (setsize) \ 150 ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \ 151 |= __CPUMASK (__cpu)) \ 152 : 0; })) 153 # define __CPU_CLR_S(cpu, setsize, cpusetp) \ 154 (__extension__ \ 155 ({ size_t __cpu = (cpu); \ 156 __cpu < 8 * (setsize) \ 157 ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \ 158 &= ~__CPUMASK (__cpu)) \ 159 : 0; })) 160 # define __CPU_ISSET_S(cpu, setsize, cpusetp) \ 161 (__extension__ \ 162 ({ size_t __cpu = (cpu); \ 163 __cpu < 8 * (setsize) \ 164 ? ((((__const __cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \ 165 & __CPUMASK (__cpu))) != 0 \ 166 : 0; })) 167 168 # define __CPU_COUNT_S(setsize, cpusetp) \ 169 __sched_cpucount (setsize, cpusetp) 170 171 # if __GNUC_PREREQ (2, 91) 172 # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ 173 (__builtin_memcmp (cpusetp1, cpusetp2, setsize) == 0) 174 # else 175 # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ 176 (__extension__ \ 177 ({ __const __cpu_mask *__arr1 = (cpusetp1)->__bits; \ 178 __const __cpu_mask *__arr2 = (cpusetp2)->__bits; \ 179 size_t __imax = (setsize) / sizeof (__cpu_mask); \ 180 size_t __i; \ 181 for (__i = 0; __i < __imax; ++__i) \ 182 if (__arr1[__i] != __arr2[__i]) \ 183 break; \ 184 __i == __imax; })) 185 # endif 186 187 # define __CPU_OP_S(setsize, destset, srcset1, srcset2, op) \ 188 (__extension__ \ 189 ({ cpu_set_t *__dest = (destset); \ 190 __const __cpu_mask *__arr1 = (srcset1)->__bits; \ 191 __const __cpu_mask *__arr2 = (srcset2)->__bits; \ 192 size_t __imax = (setsize) / sizeof (__cpu_mask); \ 193 size_t __i; \ 194 for (__i = 0; __i < __imax; ++__i) \ 195 ((__cpu_mask *) __dest->__bits)[__i] = __arr1[__i] op __arr2[__i]; \ 196 __dest; })) 197 198 # define __CPU_ALLOC_SIZE(count) \ 199 ((((count) + __NCPUBITS - 1) / __NCPUBITS) * sizeof (__cpu_mask)) 200 # define __CPU_ALLOC(count) __sched_cpualloc (count) 201 # define __CPU_FREE(cpuset) __sched_cpufree (cpuset) 202 203 __BEGIN_DECLS 204 205 extern int __sched_cpucount (size_t __setsize, const cpu_set_t *__setp) 206 __THROW; 207 extern cpu_set_t *__sched_cpualloc (size_t __count) __THROW __wur; 208 extern void __sched_cpufree (cpu_set_t *__set) __THROW; 209 210 __END_DECLS 211 212 #endif 213
