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Diffstat (limited to 'REORG.TODO/bits/sched.h')
| -rw-r--r-- | REORG.TODO/bits/sched.h | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/REORG.TODO/bits/sched.h b/REORG.TODO/bits/sched.h new file mode 100644 index 0000000000..c36c569db3 --- /dev/null +++ b/REORG.TODO/bits/sched.h @@ -0,0 +1,151 @@ +/* Definitions of constants and data structure for POSIX 1003.1b-1993 + scheduling interface. + Copyright (C) 1996-2017 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 + +/* Data structure to describe a process' schedulability. */ +struct sched_param +{ + int __sched_priority; +}; + +#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 |