sched.h
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上传日期:2009-04-28
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文件大小:4k
- /* Definitions of constants and data structure for POSIX 1003.1b-1993
- scheduling interface.
- Copyright (C) 1996-1999,2001,2002,2003 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_MISC
- /* 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_STOPPED 0x02000000 /* Start in stopped state. */
- #endif
- /* The official definition. */
- struct sched_param
- {
- int __sched_priority;
- };
- __BEGIN_DECLS
- /* Clone current process. */
- #ifdef __USE_MISC
- extern int clone (int (*__fn) (void *__arg), void *__child_stack,
- int __flags, void *__arg) __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'. */
- 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. */
- # define __CPU_ZERO(cpusetp)
- do {
- unsigned int __i;
- cpu_set_t *__arr = (cpusetp);
- for (__i = 0; __i < sizeof (cpu_set_t) / sizeof (__cpu_mask); ++__i)
- __arr->__bits[__i] = 0;
- } while (0)
- # define __CPU_SET(cpu, cpusetp)
- ((cpusetp)->__bits[__CPUELT (cpu)] |= __CPUMASK (cpu))
- # define __CPU_CLR(cpu, cpusetp)
- ((cpusetp)->__bits[__CPUELT (cpu)] &= ~__CPUMASK (cpu))
- # define __CPU_ISSET(cpu, cpusetp)
- (((cpusetp)->__bits[__CPUELT (cpu)] & __CPUMASK (cpu)) != 0)
- #endif