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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 | /* Definitions of constants and data structure for POSIX 1003.1b-1993 scheduling interface. Copyright (C) 1996-2015 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #ifndef __need_schedparam #ifndef _SCHED_H # error "Never include <bits/sched.h> directly; use <sched.h> instead." #endif /* Scheduling algorithms. */ #define SCHED_OTHER 0 #define SCHED_FIFO 1 #define SCHED_RR 2 #ifdef __USE_GNU # define SCHED_BATCH 3 # define SCHED_IDLE 5 # define SCHED_RESET_ON_FORK 0x40000000 #endif #ifdef __USE_GNU /* Cloning flags. */ # define CSIGNAL 0x000000ff /* Signal mask to be sent at exit. */ # define CLONE_VM 0x00000100 /* Set if VM shared between processes. */ # define CLONE_FS 0x00000200 /* Set if fs info shared between processes. */ # define CLONE_FILES 0x00000400 /* Set if open files shared between processes. */ # define CLONE_SIGHAND 0x00000800 /* Set if signal handlers shared. */ # define CLONE_PTRACE 0x00002000 /* Set if tracing continues on the child. */ # define CLONE_VFORK 0x00004000 /* Set if the parent wants the child to wake it up on mm_release. */ # define CLONE_PARENT 0x00008000 /* Set if we want to have the same parent as the cloner. */ # define CLONE_THREAD 0x00010000 /* Set to add to same thread group. */ # define CLONE_NEWNS 0x00020000 /* Set to create new namespace. */ # define CLONE_SYSVSEM 0x00040000 /* Set to shared SVID SEM_UNDO semantics. */ # define CLONE_SETTLS 0x00080000 /* Set TLS info. */ # define CLONE_PARENT_SETTID 0x00100000 /* Store TID in userlevel buffer before MM copy. */ # define CLONE_CHILD_CLEARTID 0x00200000 /* Register exit futex and memory location to clear. */ # define CLONE_DETACHED 0x00400000 /* Create clone detached. */ # define CLONE_UNTRACED 0x00800000 /* Set if the tracing process can't force CLONE_PTRACE on this clone. */ # define CLONE_CHILD_SETTID 0x01000000 /* Store TID in userlevel buffer in the child. */ # define CLONE_NEWUTS 0x04000000 /* New utsname group. */ # define CLONE_NEWIPC 0x08000000 /* New ipcs. */ # define CLONE_NEWUSER 0x10000000 /* New user namespace. */ # define CLONE_NEWPID 0x20000000 /* New pid namespace. */ # define CLONE_NEWNET 0x40000000 /* New network namespace. */ # define CLONE_IO 0x80000000 /* Clone I/O context. */ #endif /* The official definition. */ struct sched_param { int __sched_priority; }; __BEGIN_DECLS #ifdef __USE_GNU /* Clone current process. */ extern int clone (int (*__fn) (void *__arg), void *__child_stack, int __flags, void *__arg, ...) __THROW; /* Unshare the specified resources. */ extern int unshare (int __flags) __THROW; /* Get index of currently used CPU. */ extern int sched_getcpu (void) __THROW; /* Switch process to namespace of type NSTYPE indicated by FD. */ extern int setns (int __fd, int __nstype) __THROW; #endif __END_DECLS #endif /* need schedparam */ #if !defined __defined_schedparam \ && (defined __need_schedparam || defined _SCHED_H) # define __defined_schedparam 1 /* Data structure to describe a process' schedulability. */ struct __sched_param { int __sched_priority; }; # undef __need_schedparam #endif #if defined _SCHED_H && !defined __cpu_set_t_defined # define __cpu_set_t_defined /* Size definition for CPU sets. */ # define __CPU_SETSIZE 1024 # define __NCPUBITS (8 * sizeof (__cpu_mask)) # include <stdlib.h> /* Type for array elements in 'cpu_set_t'. */ typedef unsigned long int __cpu_mask; /* Basic access functions. */ # define __CPUELT(cpu) ((cpu) / __NCPUBITS) # define __CPUMASK(cpu) ((__cpu_mask) 1 << ((cpu) % __NCPUBITS)) /* Data structure to describe CPU mask. */ typedef struct { __cpu_mask __bits[__CPU_SETSIZE / __NCPUBITS]; } cpu_set_t; /* Access functions for CPU masks. */ # if __GNUC_PREREQ (2, 91) # define __CPU_ZERO_S(setsize, cpusetp) \ do __builtin_memset (cpusetp, '\0', setsize); while (0) # else # define __CPU_ZERO_S(setsize, cpusetp) \ do { \ size_t __i; \ size_t __imax = (setsize) / sizeof (__cpu_mask); \ __cpu_mask *__bits = (cpusetp)->__bits; \ for (__i = 0; __i < __imax; ++__i) \ __bits[__i] = 0; \ } while (0) # endif # define __CPU_SET_S(cpu, setsize, cpusetp) \ (__extension__ \ ({ size_t __cpu = (cpu); \ __cpu / 8 < (setsize) \ ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \ |= __CPUMASK (__cpu)) \ : 0; })) # define __CPU_CLR_S(cpu, setsize, cpusetp) \ (__extension__ \ ({ size_t __cpu = (cpu); \ __cpu / 8 < (setsize) \ ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \ &= ~__CPUMASK (__cpu)) \ : 0; })) # define __CPU_ISSET_S(cpu, setsize, cpusetp) \ (__extension__ \ ({ size_t __cpu = (cpu); \ __cpu / 8 < (setsize) \ ? ((((const __cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \ & __CPUMASK (__cpu))) != 0 \ : 0; })) # define __CPU_COUNT_S(setsize, cpusetp) \ __sched_cpucount (setsize, cpusetp) # if __GNUC_PREREQ (2, 91) # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ (__builtin_memcmp (cpusetp1, cpusetp2, setsize) == 0) # else # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ (__extension__ \ ({ const __cpu_mask *__arr1 = (cpusetp1)->__bits; \ const __cpu_mask *__arr2 = (cpusetp2)->__bits; \ size_t __imax = (setsize) / sizeof (__cpu_mask); \ size_t __i; \ for (__i = 0; __i < __imax; ++__i) \ if (__arr1[__i] != __arr2[__i]) \ break; \ __i == __imax; })) # endif # define __CPU_OP_S(setsize, destset, srcset1, srcset2, op) \ (__extension__ \ ({ cpu_set_t *__dest = (destset); \ const __cpu_mask *__arr1 = (srcset1)->__bits; \ const __cpu_mask *__arr2 = (srcset2)->__bits; \ size_t __imax = (setsize) / sizeof (__cpu_mask); \ size_t __i; \ for (__i = 0; __i < __imax; ++__i) \ ((__cpu_mask *) __dest->__bits)[__i] = __arr1[__i] op __arr2[__i]; \ __dest; })) # define __CPU_ALLOC_SIZE(count) \ ((((count) + __NCPUBITS - 1) / __NCPUBITS) * sizeof (__cpu_mask)) # define __CPU_ALLOC(count) __sched_cpualloc (count) # define __CPU_FREE(cpuset) __sched_cpufree (cpuset) __BEGIN_DECLS extern int __sched_cpucount (size_t __setsize, const cpu_set_t *__setp) __THROW; #if 0 /* in uClibc we use macros */ extern cpu_set_t *__sched_cpualloc (size_t __count) __THROW __wur; extern void __sched_cpufree (cpu_set_t *__set) __THROW; #else # define __sched_cpualloc(cnt) ((cpu_set_t *)malloc(__CPU_ALLOC_SIZE(cnt))) # define __sched_cpufree(__set) free(__set) #endif __END_DECLS #endif |