1 /* Definitions of constants and data structure for POSIX 1003.1b-1993 2 scheduling interface. 3 Copyright (C) 1996-1999,2001-2003,2005,2006,2007,2008,2009,2011,2012 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, see 19 <http://www.gnu.org/licenses/>. */ 20 21 #ifndef __need_schedparam 22 23 #ifndef _SCHED_H 24 # error "Never include <bits/sched.h> directly; use <sched.h> instead." 25 #endif 26 27 28 /* Scheduling algorithms. */ 29 #define SCHED_OTHER 0 30 #define SCHED_FIFO 1 31 #define SCHED_RR 2 32 #ifdef __USE_GNU 33 # define SCHED_BATCH 3 34 # define SCHED_IDLE 5 35 36 # define SCHED_RESET_ON_FORK 0x40000000 37 #endif 38 39 #ifdef __USE_GNU 40 /* Cloning flags. */ 41 # define CSIGNAL 0x000000ff /* Signal mask to be sent at exit. */ 42 # define CLONE_VM 0x00000100 /* Set if VM shared between processes. */ 43 # define CLONE_FS 0x00000200 /* Set if fs info shared between processes. */ 44 # define CLONE_FILES 0x00000400 /* Set if open files shared between processes. */ 45 # define CLONE_SIGHAND 0x00000800 /* Set if signal handlers shared. */ 46 # define CLONE_PTRACE 0x00002000 /* Set if tracing continues on the child. */ 47 # define CLONE_VFORK 0x00004000 /* Set if the parent wants the child to 48 wake it up on mm_release. */ 49 # define CLONE_PARENT 0x00008000 /* Set if we want to have the same 50 parent as the cloner. */ 51 # define CLONE_THREAD 0x00010000 /* Set to add to same thread group. */ 52 # define CLONE_NEWNS 0x00020000 /* Set to create new namespace. */ 53 # define CLONE_SYSVSEM 0x00040000 /* Set to shared SVID SEM_UNDO semantics. */ 54 # define CLONE_SETTLS 0x00080000 /* Set TLS info. */ 55 # define CLONE_PARENT_SETTID 0x00100000 /* Store TID in userlevel buffer 56 before MM copy. */ 57 # define CLONE_CHILD_CLEARTID 0x00200000 /* Register exit futex and memory 58 location to clear. */ 59 # define CLONE_DETACHED 0x00400000 /* Create clone detached. */ 60 # define CLONE_UNTRACED 0x00800000 /* Set if the tracing process can't 61 force CLONE_PTRACE on this clone. */ 62 # define CLONE_CHILD_SETTID 0x01000000 /* Store TID in userlevel buffer in 63 the child. */ 64 # define CLONE_NEWUTS 0x04000000 /* New utsname group. */ 65 # define CLONE_NEWIPC 0x08000000 /* New ipcs. */ 66 # define CLONE_NEWUSER 0x10000000 /* New user namespace. */ 67 # define CLONE_NEWPID 0x20000000 /* New pid namespace. */ 68 # define CLONE_NEWNET 0x40000000 /* New network namespace. */ 69 # define CLONE_IO 0x80000000 /* Clone I/O context. */ 70 #endif 71 72 /* The official definition. */ 73 struct sched_param 74 { 75 int __sched_priority; 76 }; 77 78 __BEGIN_DECLS 79 80 #ifdef __USE_GNU 81 /* Clone current process. */ 82 extern int clone (int (*__fn) (void *__arg), void *__child_stack, 83 int __flags, void *__arg, ...) __THROW; 84 85 /* Unshare the specified resources. */ 86 extern int unshare (int __flags) __THROW; 87 88 /* Get index of currently used CPU. */ 89 extern int sched_getcpu (void) __THROW; 90 91 /* Switch process to namespace of type NSTYPE indicated by FD. */ 92 extern int setns (int __fd, int __nstype) __THROW; 93 #endif 94 95 96 __END_DECLS 97 98 #endif /* need schedparam */ 99 100 #if !defined __defined_schedparam \ 101 && (defined __need_schedparam || defined _SCHED_H) 102 # define __defined_schedparam 1 103 /* Data structure to describe a process' schedulability. */ 104 struct __sched_param 105 { 106 int __sched_priority; 107 }; 108 # undef __need_schedparam 109 #endif 110 111 112 #if defined _SCHED_H && !defined __cpu_set_t_defined 113 # define __cpu_set_t_defined 114 /* Size definition for CPU sets. */ 115 # define __CPU_SETSIZE 1024 116 # define __NCPUBITS (8 * sizeof (__cpu_mask)) 117 118 /* Type for array elements in 'cpu_set_t'. */ 119 typedef unsigned long int __cpu_mask; 120 121 /* Basic access functions. */ 122 # define __CPUELT(cpu) ((cpu) / __NCPUBITS) 123 # define __CPUMASK(cpu) ((__cpu_mask) 1 << ((cpu) % __NCPUBITS)) 124 125 /* Data structure to describe CPU mask. */ 126 typedef struct 127 { 128 __cpu_mask __bits[__CPU_SETSIZE / __NCPUBITS]; 129 } cpu_set_t; 130 131 /* Access functions for CPU masks. */ 132 # if __GNUC_PREREQ (2, 91) 133 # define __CPU_ZERO_S(setsize, cpusetp) \ 134 do __builtin_memset (cpusetp, '\0', setsize); while (0) 135 # else 136 # define __CPU_ZERO_S(setsize, cpusetp) \ 137 do { \ 138 size_t __i; \ 139 size_t __imax = (setsize) / sizeof (__cpu_mask); \ 140 __cpu_mask *__bits = (cpusetp)->__bits; \ 141 for (__i = 0; __i < __imax; ++__i) \ 142 __bits[__i] = 0; \ 143 } while (0) 144 # endif 145 # define __CPU_SET_S(cpu, setsize, cpusetp) \ 146 (__extension__ \ 147 ({ size_t __cpu = (cpu); \ 148 __cpu < 8 * (setsize) \ 149 ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \ 150 |= __CPUMASK (__cpu)) \ 151 : 0; })) 152 # define __CPU_CLR_S(cpu, setsize, cpusetp) \ 153 (__extension__ \ 154 ({ size_t __cpu = (cpu); \ 155 __cpu < 8 * (setsize) \ 156 ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \ 157 &= ~__CPUMASK (__cpu)) \ 158 : 0; })) 159 # define __CPU_ISSET_S(cpu, setsize, cpusetp) \ 160 (__extension__ \ 161 ({ size_t __cpu = (cpu); \ 162 __cpu < 8 * (setsize) \ 163 ? ((((const __cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \ 164 & __CPUMASK (__cpu))) != 0 \ 165 : 0; })) 166 167 # define __CPU_COUNT_S(setsize, cpusetp) \ 168 __sched_cpucount (setsize, cpusetp) 169 170 # if __GNUC_PREREQ (2, 91) 171 # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ 172 (__builtin_memcmp (cpusetp1, cpusetp2, setsize) == 0) 173 # else 174 # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ 175 (__extension__ \ 176 ({ const __cpu_mask *__arr1 = (cpusetp1)->__bits; \ 177 const __cpu_mask *__arr2 = (cpusetp2)->__bits; \ 178 size_t __imax = (setsize) / sizeof (__cpu_mask); \ 179 size_t __i; \ 180 for (__i = 0; __i < __imax; ++__i) \ 181 if (__arr1[__i] != __arr2[__i]) \ 182 break; \ 183 __i == __imax; })) 184 # endif 185 186 # define __CPU_OP_S(setsize, destset, srcset1, srcset2, op) \ 187 (__extension__ \ 188 ({ cpu_set_t *__dest = (destset); \ 189 const __cpu_mask *__arr1 = (srcset1)->__bits; \ 190 const __cpu_mask *__arr2 = (srcset2)->__bits; \ 191 size_t __imax = (setsize) / sizeof (__cpu_mask); \ 192 size_t __i; \ 193 for (__i = 0; __i < __imax; ++__i) \ 194 ((__cpu_mask *) __dest->__bits)[__i] = __arr1[__i] op __arr2[__i]; \ 195 __dest; })) 196 197 # define __CPU_ALLOC_SIZE(count) \ 198 ((((count) + __NCPUBITS - 1) / __NCPUBITS) * sizeof (__cpu_mask)) 199 # define __CPU_ALLOC(count) __sched_cpualloc (count) 200 # define __CPU_FREE(cpuset) __sched_cpufree (cpuset) 201 202 __BEGIN_DECLS 203 204 extern int __sched_cpucount (size_t __setsize, const cpu_set_t *__setp) 205 __THROW; 206 extern cpu_set_t *__sched_cpualloc (size_t __count) __THROW __wur; 207 extern void __sched_cpufree (cpu_set_t *__set) __THROW; 208 209 __END_DECLS 210 211 #endif 212