| /* 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 |
| 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #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 |
