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Diffstat (limited to 'sysdeps/generic/bits/sched.h')
-rw-r--r-- | sysdeps/generic/bits/sched.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/sysdeps/generic/bits/sched.h b/sysdeps/generic/bits/sched.h new file mode 100644 index 0000000..91b6dca --- /dev/null +++ b/sysdeps/generic/bits/sched.h @@ -0,0 +1,71 @@ +/* Definitions of constants and data structure for POSIX 1003.1b-1993 + scheduling interface. + Copyright (C) 1996, 1997, 2001, 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 _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; +}; + + +#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 *__arr = (cpusetp); \ + for (__i = 0; __i < sizeof (cpu_set) / 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 |