#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <unistd.h>

#define atomic_on() \
do { \
	if (gettimeofday((void *)1,(void *)1)) { \
		printf("failed: wrong kernel?\n"); \
		abort(); \
	} \
} while (0)

#define atomic_off()	gettimeofday((void *)1,(void *)0)

int main(void)
{
	printf("testing atomic mode functionality.\n");
	atomic_on();
	atomic_off();
	printf("ok, kernel supports atomic mode.\n");

	printf("atomic mode is now off - doing sleep(), should succeed:\n");
	sleep(1);
	printf("turning atomic mode on.\n");
	atomic_on();
	printf("doing getppid() syscall - should succeed.\n");
	getppid();
	printf("doing sleep() syscall - should abort!\n");
	sleep(1);
	printf("huh? got back and no signal?\n");

	return 0;
}