nativelibc/getpagesize.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>

int getpagesize() {
	SYSTEM_BASIC_INFORMATION sbi;
	int status = NtQuerySystemInformation(SystemBasicInformation, &sbi, sizeof sbi, NULL);
	if(status < 0) return -1;	// Don't change the errno
	return sbi.PageSize;
}