syscall_magic.h

/*
 this sticks around for documentation issues only and will be removed in the next
 release - it documents the direct syscalls for affinity, without going thru glibc
 */

#if 0

/* 
 I don't know where this was exactly taken from, but I think I found it
 in glibc.
 */
#include <linux/unistd.h>
#define __NR_sched_setaffinity	241
#define __NR_sched_getaffinity	242

/*
 a nice macro to define the following:
 it's a syscall with 3 args,
 it returns int,
 it's named sched_....,
 the next arg is of type pid_t,
 has the local name pid,
 next is unsigned int,
 with name len,
 then an unsigned long *,
 named user_mask_ptr
 */
_syscall3 (int, sched_setaffinity, pid_t, pid, unsigned int, len, unsigned long *, user_mask_ptr)
_syscall3 (int, sched_getaffinity, pid_t, pid, unsigned int, len, unsigned long *, user_mask_ptr)

#endif

#include <linux/kernel.h>
#include <linux/unistd.h>
#include <linux/types.h>
#include <time.h>

/* XXX use the proper syscall numbers */
#ifdef __x86_64__
#define __NR_sched_setattr		314
#define __NR_sched_getattr		315
#endif

#ifdef __i386__
#define __NR_sched_setattr		351
#define __NR_sched_getattr		352
#endif

#ifdef __arm__
#define __NR_sched_setattr		380
#define __NR_sched_getattr		381
#endif

#define SF_SIG_RORUN	2
#define SF_SIG_DMISS	4

struct sched_attr {
	__u32 size;

	__u32 sched_policy;
	__u64 sched_flags;

	/* SCHED_NORMAL, SCHED_BATCH */
	__s32 sched_nice;

	/* SCHED_FIFO, SCHED_RR */
	__u32 sched_priority;

	/* SCHED_DEADLINE */
	__u64 sched_runtime;
	__u64 sched_deadline;
	__u64 sched_period;
};

#define sched_getattr(pid, attr, size, flags) \
	syscall(__NR_sched_getattr, pid, attr, size, flags)

#define sched_setattr(pid, attr, flags) \
	syscall(__NR_sched_setattr, pid, attr)