diff options
Diffstat (limited to 'bits')
| -rw-r--r-- | bits/sched.h | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/bits/sched.h b/bits/sched.h index d0d655d48e..fc754bff51 100644 --- a/bits/sched.h +++ b/bits/sched.h @@ -1,6 +1,6 @@ /* Definitions of constants and data structure for POSIX 1003.1b-1993 scheduling interface. - Copyright (C) 1996, 1997, 2001 Free Software Foundation, Inc. + 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 @@ -33,3 +33,36 @@ struct sched_param { int __sched_priority; }; + + +/* 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) |