102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
/* Common functions for Microsoft Windows builds of Emacs
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Copyright (C) 2012-2024 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at
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your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef W32COMMON_H
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#define W32COMMON_H
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#include <windows.h>
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#define ROUND_UP(p, align) (((DWORD_PTR)(p) + (align)-1) & ~((DWORD_PTR)(align)-1))
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#define ROUND_DOWN(p, align) ((DWORD_PTR)(p) & ~((DWORD_PTR)(align)-1))
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#define get_page_size() sysinfo_cache.dwPageSize
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#define get_allocation_unit() sysinfo_cache.dwAllocationGranularity
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#define get_processor_type() sysinfo_cache.dwProcessorType
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#define get_w32_major_version() w32_major_version
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#define get_w32_minor_version() w32_minor_version
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extern SYSTEM_INFO sysinfo_cache;
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extern OSVERSIONINFO osinfo_cache;
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extern DWORD_PTR syspage_mask;
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extern int w32_major_version;
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extern int w32_minor_version;
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extern int w32_build_number;
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enum {
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OS_SUBTYPE_9X = 1,
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OS_SUBTYPE_NT
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};
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extern int os_subtype;
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/* Cache system info, e.g., the NT page size. */
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extern void cache_system_info (void);
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#ifdef WINDOWSNT
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/* Return a static buffer with the MS-Windows version string. */
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extern char * w32_version_string (void);
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#endif
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typedef void (* VOIDFNPTR) (void);
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/* Load a function address from a DLL. Cast the result via VOIDFNPTR
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to pacify -Wcast-function-type in GCC 8.1. The return value must
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be cast to the correct function pointer type. */
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INLINE VOIDFNPTR get_proc_addr (HINSTANCE, LPCSTR);
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INLINE VOIDFNPTR
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get_proc_addr (HINSTANCE handle, LPCSTR fname)
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{
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return (VOIDFNPTR) GetProcAddress (handle, fname);
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}
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/* Define a function that will be loaded from a DLL. The variable
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arguments should contain the argument list for the function, and
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optionally be followed by function attributes. For example:
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DEF_DLL_FN (void, png_longjmp, (png_structp, int) PNG_NORETURN);
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*/
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#define DEF_DLL_FN(type, func, ...) \
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typedef type (CDECL *W32_PFN_##func) __VA_ARGS__; \
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static W32_PFN_##func fn_##func
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/* Load a function from the DLL. */
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#define LOAD_DLL_FN(lib, func) \
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do \
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{ \
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fn_##func = (W32_PFN_##func) get_proc_addr (lib, #func); \
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if (!fn_##func) \
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return false; \
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} \
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while (false)
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/* Load a function from the DLL, and don't fail if it does not exist. */
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#define LOAD_DLL_FN_OPT(lib, func) \
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do \
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{ \
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fn_##func = (W32_PFN_##func) get_proc_addr (lib, #func); \
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} \
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while (false)
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#ifdef HAVE_HARFBUZZ
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extern bool hbfont_init_w32_funcs (HMODULE);
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#endif
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#endif /* W32COMMON_H */
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