/* Common functions for Microsoft Windows builds of Emacs
   Copyright (C) 2012-2018 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs 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 3 of the License, or (at
your option) any later version.

GNU Emacs 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.

You should have received a copy of the GNU General Public License
along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

*/

#ifndef W32COMMON_H
#define W32COMMON_H

#include <windows.h>

#define ROUND_UP(p, align)   (((DWORD_PTR)(p) + (align)-1) & ~((DWORD_PTR)(align)-1))
#define ROUND_DOWN(p, align) ((DWORD_PTR)(p) & ~((DWORD_PTR)(align)-1))

#define get_page_size()			sysinfo_cache.dwPageSize
#define get_allocation_unit()		sysinfo_cache.dwAllocationGranularity
#define get_processor_type()		sysinfo_cache.dwProcessorType
#define get_w32_major_version()  	w32_major_version
#define get_w32_minor_version()  	w32_minor_version

extern SYSTEM_INFO    sysinfo_cache;
extern OSVERSIONINFO  osinfo_cache;
extern DWORD_PTR      syspage_mask;

extern int    	      w32_major_version;
extern int    	      w32_minor_version;
extern int    	      w32_build_number;

enum {
  OS_9X = 1,
  OS_NT
};

extern int os_subtype;

/* Cache system info, e.g., the NT page size.  */
extern void cache_system_info (void);

#endif /* W32COMMON_H */