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/* Common functions for Microsoft Windows builds of Emacs
Copyright (C) 2012-2021 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_SUBTYPE_9X = 1,
OS_SUBTYPE_NT
};
extern int os_subtype;
/* Cache system info, e.g., the NT page size. */
extern void cache_system_info (void);
#ifdef WINDOWSNT
/* Return a static buffer with the MS-Windows version string. */
extern char * w32_version_string (void);
#endif
typedef void (* VOIDFNPTR) (void);
/* Load a function address from a DLL. Cast the result via VOIDFNPTR
to pacify -Wcast-function-type in GCC 8.1. The return value must
be cast to the correct function pointer type. */
INLINE VOIDFNPTR get_proc_addr (HINSTANCE, LPCSTR);
INLINE VOIDFNPTR
get_proc_addr (HINSTANCE handle, LPCSTR fname)
{
return (VOIDFNPTR) GetProcAddress (handle, fname);
}
/* Define a function that will be loaded from a DLL. The variable
arguments should contain the argument list for the function, and
optionally be followed by function attributes. For example:
DEF_DLL_FN (void, png_longjmp, (png_structp, int) PNG_NORETURN);
*/
#define DEF_DLL_FN(type, func, ...) \
typedef type (CDECL *W32_PFN_##func) __VA_ARGS__; \
static W32_PFN_##func fn_##func
/* Load a function from the DLL. */
#define LOAD_DLL_FN(lib, func) \
do \
{ \
fn_##func = (W32_PFN_##func) get_proc_addr (lib, #func); \
if (!fn_##func) \
return false; \
} \
while (false)
/* Load a function from the DLL, and don't fail if it does not exist. */
#define LOAD_DLL_FN_OPT(lib, func) \
do \
{ \
fn_##func = (W32_PFN_##func) get_proc_addr (lib, #func); \
} \
while (false)
#ifdef HAVE_HARFBUZZ
extern bool hbfont_init_w32_funcs (HMODULE);
#endif
#endif /* W32COMMON_H */
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