nativelibc/sleep.c

/*	A part of the Native C Library for Windows NT
	Copyright 2007-2015 PC GO Ld.

	This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

	This program 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 General Public License for more details.
*/

#include <windows.h>
#include <nt.h>
#include <errno.h>
#include <limits.h>

int usleep(unsigned long int useconds) {
	LARGE_INTEGER interval;
	interval.QuadPart = -((long long int)useconds * 10);
	long int status = NtDelayExecution(1, &interval);
	return __set_errno_from_ntstatus(status) ? -1 : 0;
}

unsigned int sleep(unsigned int seconds) {
	unsigned long long int useconds = seconds * 1000000;
#if ULONG_MAX < ULLONG_MAX
	while(useconds > ULONG_MAX) {
		usleep(LONG_MAX);
		useconds -= LONG_MAX;
	}
#endif
	usleep(useconds);
	return 0;
}