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5107cf1d UD |
1 | /* Definitions of constants and data structure for POSIX 1003.1b-1993 |
2 | scheduling interface. | |
298711ff | 3 | Copyright (C) 1996-1999,2001-2003,2005,2006,2007,2008,2009,2011 |
2b7e92df | 4 | Free Software Foundation, Inc. |
54d79e99 | 5 | This file is part of the GNU C Library. |
92777700 | 6 | |
54d79e99 | 7 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
92777700 | 11 | |
54d79e99 UD |
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 | |
41bdb6e2 | 15 | Lesser General Public License for more details. |
92777700 | 16 | |
41bdb6e2 AJ |
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 | |
20 | 02111-1307 USA. */ | |
92777700 | 21 | |
ece29840 ST |
22 | #ifndef __need_schedparam |
23 | ||
5107cf1d | 24 | #ifndef _SCHED_H |
f4017d20 | 25 | # error "Never include <bits/sched.h> directly; use <sched.h> instead." |
5107cf1d UD |
26 | #endif |
27 | ||
28 | ||
29 | /* Scheduling algorithms. */ | |
30 | #define SCHED_OTHER 0 | |
31 | #define SCHED_FIFO 1 | |
32 | #define SCHED_RR 2 | |
33 | ||
34 | /* Data structure to describe a process' schedulability. */ | |
35 | struct sched_param | |
36 | { | |
4a2c9975 | 37 | int __sched_priority; |
5107cf1d | 38 | }; |
949ec764 | 39 | |
ece29840 ST |
40 | #endif /* need schedparam */ |
41 | ||
42 | #if !defined __defined_schedparam \ | |
43 | && (defined __need_schedparam || defined _SCHED_H) | |
44 | # define __defined_schedparam 1 | |
45 | /* Data structure to describe a process' schedulability. */ | |
46 | struct __sched_param | |
47 | { | |
48 | int __sched_priority; | |
49 | }; | |
50 | # undef __need_schedparam | |
51 | #endif | |
52 | ||
949ec764 | 53 | |
0e563cd6 UD |
54 | #if defined _SCHED_H && !defined __cpu_set_t_defined |
55 | # define __cpu_set_t_defined | |
949ec764 | 56 | /* Size definition for CPU sets. */ |
0e563cd6 UD |
57 | # define __CPU_SETSIZE 1024 |
58 | # define __NCPUBITS (8 * sizeof (__cpu_mask)) | |
949ec764 | 59 | |
2b7e92df | 60 | /* Type for array elements in 'cpu_set_t'. */ |
949ec764 UD |
61 | typedef unsigned long int __cpu_mask; |
62 | ||
63 | /* Basic access functions. */ | |
0e563cd6 UD |
64 | # define __CPUELT(cpu) ((cpu) / __NCPUBITS) |
65 | # define __CPUMASK(cpu) ((__cpu_mask) 1 << ((cpu) % __NCPUBITS)) | |
949ec764 UD |
66 | |
67 | /* Data structure to describe CPU mask. */ | |
68 | typedef struct | |
69 | { | |
70 | __cpu_mask __bits[__CPU_SETSIZE / __NCPUBITS]; | |
71 | } cpu_set_t; | |
72 | ||
73 | /* Access functions for CPU masks. */ | |
2b7e92df ST |
74 | # if __GNUC_PREREQ (2, 91) |
75 | # define __CPU_ZERO_S(setsize, cpusetp) \ | |
76 | do __builtin_memset (cpusetp, '\0', setsize); while (0) | |
77 | # else | |
78 | # define __CPU_ZERO_S(setsize, cpusetp) \ | |
949ec764 | 79 | do { \ |
2b7e92df ST |
80 | size_t __i; \ |
81 | size_t __imax = (setsize) / sizeof (__cpu_mask); \ | |
82 | __cpu_mask *__bits = (cpusetp)->__bits; \ | |
83 | for (__i = 0; __i < __imax; ++__i) \ | |
84 | __bits[__i] = 0; \ | |
949ec764 | 85 | } while (0) |
2b7e92df ST |
86 | # endif |
87 | # define __CPU_SET_S(cpu, setsize, cpusetp) \ | |
88 | (__extension__ \ | |
89 | ({ size_t __cpu = (cpu); \ | |
90 | __cpu < 8 * (setsize) \ | |
91 | ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \ | |
92 | |= __CPUMASK (__cpu)) \ | |
93 | : 0; })) | |
94 | # define __CPU_CLR_S(cpu, setsize, cpusetp) \ | |
95 | (__extension__ \ | |
96 | ({ size_t __cpu = (cpu); \ | |
97 | __cpu < 8 * (setsize) \ | |
98 | ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \ | |
99 | &= ~__CPUMASK (__cpu)) \ | |
100 | : 0; })) | |
101 | # define __CPU_ISSET_S(cpu, setsize, cpusetp) \ | |
102 | (__extension__ \ | |
103 | ({ size_t __cpu = (cpu); \ | |
104 | __cpu < 8 * (setsize) \ | |
105 | ? ((((__const __cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)] \ | |
106 | & __CPUMASK (__cpu))) != 0 \ | |
107 | : 0; })) | |
108 | ||
109 | # define __CPU_COUNT_S(setsize, cpusetp) \ | |
110 | __sched_cpucount (setsize, cpusetp) | |
111 | ||
112 | # if __GNUC_PREREQ (2, 91) | |
113 | # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ | |
114 | (__builtin_memcmp (cpusetp1, cpusetp2, setsize) == 0) | |
115 | # else | |
116 | # define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \ | |
117 | (__extension__ \ | |
118 | ({ __const __cpu_mask *__arr1 = (cpusetp1)->__bits; \ | |
119 | __const __cpu_mask *__arr2 = (cpusetp2)->__bits; \ | |
120 | size_t __imax = (setsize) / sizeof (__cpu_mask); \ | |
121 | size_t __i; \ | |
122 | for (__i = 0; __i < __imax; ++__i) \ | |
298711ff | 123 | if (__arr1[__i] != __arr2[__i]) \ |
2b7e92df ST |
124 | break; \ |
125 | __i == __imax; })) | |
126 | # endif | |
127 | ||
128 | # define __CPU_OP_S(setsize, destset, srcset1, srcset2, op) \ | |
129 | (__extension__ \ | |
130 | ({ cpu_set_t *__dest = (destset); \ | |
131 | __const __cpu_mask *__arr1 = (srcset1)->__bits; \ | |
132 | __const __cpu_mask *__arr2 = (srcset2)->__bits; \ | |
133 | size_t __imax = (setsize) / sizeof (__cpu_mask); \ | |
134 | size_t __i; \ | |
135 | for (__i = 0; __i < __imax; ++__i) \ | |
136 | ((__cpu_mask *) __dest->__bits)[__i] = __arr1[__i] op __arr2[__i]; \ | |
137 | __dest; })) | |
138 | ||
139 | # define __CPU_ALLOC_SIZE(count) \ | |
140 | ((((count) + __NCPUBITS - 1) / __NCPUBITS) * sizeof (__cpu_mask)) | |
141 | # define __CPU_ALLOC(count) __sched_cpualloc (count) | |
142 | # define __CPU_FREE(cpuset) __sched_cpufree (cpuset) | |
8381e467 UD |
143 | |
144 | __BEGIN_DECLS | |
145 | ||
146 | extern int __sched_cpucount (size_t __setsize, const cpu_set_t *__setp) | |
147 | __THROW; | |
2b7e92df ST |
148 | extern cpu_set_t *__sched_cpualloc (size_t __count) __THROW __wur; |
149 | extern void __sched_cpufree (cpu_set_t *__set) __THROW; | |
8381e467 UD |
150 | |
151 | __END_DECLS | |
152 | ||
0e563cd6 | 153 | #endif |