/* Definitions of constants and data structure for POSIX 1003.1b-1993 scheduling interface. Copyright (C) 1996-1999,2001-2003,2005,2006,2007,2008,2009,2011,2012 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)) /* 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; extern cpu_set_t *__sched_cpualloc (size_t __count) __THROW __wur; extern void __sched_cpufree (cpu_set_t *__set) __THROW; __END_DECLS #endif