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-rw-r--r--bits/sched.h35
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)