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 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_NEWUTS 0x04000000 /* New utsname group. */ 63 # define CLONE_NEWIPC 0x08000000 /* New ipcs. */ 64 # define CLONE_NEWUSER 0x10000000 /* New user namespace. */ 65 # define CLONE_NEWPID 0x20000000 /* New pid namespace. */ 66 # define CLONE_NEWNET 0x40000000 /* New network namespace. */ 67 # define CLONE_IO 0x80000000 /* Clone I/O context. */ 68 #endif 69 70 /* The official definition. */ 71 struct sched_param 72 { 73 int __sched_priority; 74 }; 75 76 __BEGIN_DECLS 77 78 #ifdef __USE_MISC 79 /* Clone current process. */ 80 extern int clone (int (*__fn) (void *__arg), void *__child_stack, 81 int __flags, void *__arg, ...) __THROW; 82 83 /* Unshare the specified resources. */ 84 extern int unshare (int __flags) __THROW; 85 86 /* Get index of currently used CPU. */ 87 extern int sched_getcpu (void) __THROW; 88 #endif 89 90 __END_DECLS 91 92 #endif /* need schedparam */ 93 94 #if !defined __defined_schedparam \ 95 && (defined __need_schedparam || defined _SCHED_H) 96 # define __defined_schedparam 1 97 /* Data structure to describe a process' schedulability. */ 98 struct __sched_param 99 { 100 int __sched_priority; 101 }; 102 # undef __need_schedparam 103 #endif 104 105 106 #if defined _SCHED_H && !defined __cpu_set_t_defined 107 # define __cpu_set_t_defined 108 /* Size definition for CPU sets. */ 109 # define __CPU_SETSIZE 1024 110 # define __NCPUBITS (8 * sizeof (__cpu_mask)) 111 112 /* Type for array elements in 'cpu_set_t'. */ 113 typedef unsigned long int __cpu_mask; 114 115 /* Basic access functions. */ 116 # define __CPUELT(cpu) ((cpu) / __NCPUBITS) 117 # define __CPUMASK(cpu) ((__cpu_mask) 1 << ((cpu) % __NCPUBITS)) 118 119 /* Data structure to describe CPU mask. */ 120 typedef struct 121 { 122 __cpu_mask __bits[__CPU_SETSIZE / __NCPUBITS]; 123 } cpu_set_t; 124 125 /* Access functions for CPU masks. */ 126 # if __GNUC_PREREQ (2, 91) 127 # define __CPU_ZERO_S(setsize, cpusetp) \ 128 do __builtin_memset (cpusetp, '\0', setsize); while (0) 129 # else 130 # define __CPU_ZERO_S(setsize, cpusetp) \ 131 do { \ 132 size_t __i; \ 133 size_t __imax = (setsize) / sizeof (__cpu_mask); \ 134 __cpu_mask *__bits = (cpusetp)->__bits; \ 135 for (__i = 0; __i < __imax; ++__i) \ 136 __bits[__i] = 0; \ 137 } while (0) 138 # endif 139 # define __CPU_SET_S(cpu, setsize, cpusetp) \ 140 (__extension__ \ 141 ({ size_t __cpu = (cpu); \ 142 __cpu < 8 * (setsize) \ 143 ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \ 144 |= __CPUMASK (__cpu)) \ 145 : 0; })) 146 # define __CPU_CLR_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_ISSET_S(cpu, setsize, cpusetp) \ 154 (__extension__ \ 155 ({ size_t __cpu = (cpu); \ 156 __cpu < 8 * (setsize) \ 157 ? ((((__const __cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \ 158 & __CPUMASK (__cpu))) != 0 \ 159 : 0; })) 160 161 # define __CPU_COUNT_S(setsize, cpusetp) \ 162 __sched_cpucount (setsize, cpusetp) 163 164 # if __GNUC_PREREQ (2, 91) 165 # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ 166 (__builtin_memcmp (cpusetp1, cpusetp2, setsize) == 0) 167 # else 168 # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ 169 (__extension__ \ 170 ({ __const __cpu_mask *__arr1 = (cpusetp1)->__bits; \ 171 __const __cpu_mask *__arr2 = (cpusetp2)->__bits; \ 172 size_t __imax = (setsize) / sizeof (__cpu_mask); \ 173 size_t __i; \ 174 for (__i = 0; __i < __imax; ++__i) \ 175 if (__bits[__i] != __bits[__i]) \ 176 break; \ 177 __i == __imax; })) 178 # endif 179 180 # define __CPU_OP_S(setsize, destset, srcset1, srcset2, op) \ 181 (__extension__ \ 182 ({ cpu_set_t *__dest = (destset); \ 183 __const __cpu_mask *__arr1 = (srcset1)->__bits; \ 184 __const __cpu_mask *__arr2 = (srcset2)->__bits; \ 185 size_t __imax = (setsize) / sizeof (__cpu_mask); \ 186 size_t __i; \ 187 for (__i = 0; __i < __imax; ++__i) \ 188 ((__cpu_mask *) __dest->__bits)[__i] = __arr1[__i] op __arr2[__i]; \ 189 __dest; })) 190 191 # define __CPU_ALLOC_SIZE(count) \ 192 ((((count) + __NCPUBITS - 1) / __NCPUBITS) * sizeof (__cpu_mask)) 193 # define __CPU_ALLOC(count) __sched_cpualloc (count) 194 # define __CPU_FREE(cpuset) __sched_cpufree (cpuset) 195 196 __BEGIN_DECLS 197 198 extern int __sched_cpucount (size_t __setsize, const cpu_set_t *__setp) 199 __THROW; 200 extern cpu_set_t *__sched_cpualloc (size_t __count) __THROW __wur; 201 extern void __sched_cpufree (cpu_set_t *__set) __THROW; 202 203 __END_DECLS 204 205 #endif 206
