1 /* Definitions of constants and data structure for POSIX 1003.1b-1993
3 Copyright (C) 1996-1999,2001-2003,2005,2006,2007,2008
4 Free Software Foundation, Inc.
5 This file is part of the GNU C Library.
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.
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.
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
22 #ifndef __need_schedparam
25 # error "Never include <bits/sched.h> directly; use <sched.h> instead."
29 /* Scheduling algorithms. */
34 # define SCHED_BATCH 3
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
55 # define CLONE_CHILD_CLEARTID 0x00200000 /* Register exit futex and memory
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
62 # define CLONE_STOPPED 0x02000000 /* Start in stopped state. */
63 # define CLONE_NEWUTS 0x04000000 /* New utsname group. */
64 # define CLONE_NEWIPC 0x08000000 /* New ipcs. */
65 # define CLONE_NEWUSER 0x10000000 /* New user namespace. */
66 # define CLONE_NEWPID 0x20000000 /* New pid namespace. */
67 # define CLONE_NEWNET 0x40000000 /* New network namespace. */
68 # define CLONE_IO 0x80000000 /* Clone I/O context. */
71 /* The official definition. */
80 /* Clone current process. */
81 extern int clone (int (*__fn) (void *__arg), void *__child_stack,
82 int __flags, void *__arg, ...) __THROW;
84 /* Unshare the specified resources. */
85 extern int unshare (int __flags) __THROW;
87 /* Get index of currently used CPU. */
88 extern int sched_getcpu (void) __THROW;
93 #endif /* need schedparam */
95 #if !defined __defined_schedparam \
96 && (defined __need_schedparam || defined _SCHED_H)
97 # define __defined_schedparam 1
98 /* Data structure to describe a process' schedulability. */
101 int __sched_priority;
103 # undef __need_schedparam
107 #if defined _SCHED_H && !defined __cpu_set_t_defined
108 # define __cpu_set_t_defined
109 /* Size definition for CPU sets. */
110 # define __CPU_SETSIZE 1024
111 # define __NCPUBITS (8 * sizeof (__cpu_mask))
113 /* Type for array elements in 'cpu_set_t'. */
114 typedef unsigned long int __cpu_mask;
116 /* Basic access functions. */
117 # define __CPUELT(cpu) ((cpu) / __NCPUBITS)
118 # define __CPUMASK(cpu) ((__cpu_mask) 1 << ((cpu) % __NCPUBITS))
120 /* Data structure to describe CPU mask. */
123 __cpu_mask __bits[__CPU_SETSIZE / __NCPUBITS];
126 /* Access functions for CPU masks. */
127 # define __CPU_ZERO_S(setsize, cpusetp) \
130 size_t __imax = (setsize) / sizeof (__cpu_mask); \
131 __cpu_mask *__bits = (cpusetp)->__bits; \
132 for (__i = 0; __i < __imax; ++__i) \
135 # define __CPU_SET_S(cpu, setsize, cpusetp) \
137 ({ size_t __cpu = (cpu); \
138 __cpu < 8 * (setsize) \
139 ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \
140 |= __CPUMASK (__cpu)) \
142 # define __CPU_CLR_S(cpu, setsize, cpusetp) \
144 ({ size_t __cpu = (cpu); \
145 __cpu < 8 * (setsize) \
146 ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \
147 &= ~__CPUMASK (__cpu)) \
149 # define __CPU_ISSET_S(cpu, setsize, cpusetp) \
151 ({ size_t __cpu = (cpu); \
152 __cpu < 8 * (setsize) \
153 ? ((((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \
154 & __CPUMASK (__cpu))) != 0 \
157 # define __CPU_COUNT_S(setsize, cpusetp) \
158 __sched_cpucount (setsize, cpusetp)
160 # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \
162 ({ __cpu_mask *__arr1 = (cpusetp1)->__bits; \
163 __cpu_mask *__arr2 = (cpusetp2)->__bits; \
164 size_t __imax = (setsize) / sizeof (__cpu_mask); \
166 for (__i = 0; __i < __imax; ++__i) \
167 if (__arr1[__i] != __arr2[__i]) \
171 # define __CPU_OP_S(setsize, destset, srcset1, srcset2, op) \
173 ({ cpu_set_t *__dest = (destset); \
174 __cpu_mask *__arr1 = (srcset1)->__bits; \
175 __cpu_mask *__arr2 = (srcset2)->__bits; \
176 size_t __imax = (setsize) / sizeof (__cpu_mask); \
178 for (__i = 0; __i < __imax; ++__i) \
179 ((__cpu_mask *) __dest->__bits)[__i] = __arr1[__i] op __arr2[__i]; \
182 # define __CPU_ALLOC_SIZE(count) \
183 ((((count) + __NCPUBITS - 1) / __NCPUBITS) * sizeof (__cpu_mask))
184 # define __CPU_ALLOC(count) __sched_cpualloc (count)
185 # define __CPU_FREE(cpuset) __sched_cpufree (cpuset)
189 extern int __sched_cpucount (size_t __setsize, const cpu_set_t *__setp)
191 #if 0 /* in uClibc we use macros */
192 extern cpu_set_t *__sched_cpualloc (size_t __count) __THROW __wur;
193 extern void __sched_cpufree (cpu_set_t *__set) __THROW;
195 # define __sched_cpualloc(cnt) ((cpu_set_t *)malloc(__CPU_ALLOC_SIZE(cnt)))
196 # define __sched_cpufree(__set) free(__set)