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win32.h
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1/* src/include/port/win32.h */
2
3/*
4 * We always rely on the WIN32 macro being set by our build system,
5 * but _WIN32 is the compiler pre-defined macro. So make sure we define
6 * WIN32 whenever _WIN32 is set, to facilitate standalone building.
7 */
8#if defined(_WIN32) && !defined(WIN32)
9#define WIN32
10#endif
11
12/*
13 * Make sure _WIN32_WINNT has the minimum required value.
14 * Leave a higher value in place. The minimum requirement is Windows 10.
15 */
16#ifdef _WIN32_WINNT
17#undef _WIN32_WINNT
18#endif
19
20#define _WIN32_WINNT 0x0A00
21
22/*
23 * We need to prevent <crtdefs.h> from defining a symbol conflicting with
24 * our errcode() function. Since it's likely to get included by standard
25 * system headers, pre-emptively include it now.
26 */
27#if defined(_MSC_VER) || defined(HAVE_CRTDEFS_H)
28#define errcode __msvc_errcode
29#include <crtdefs.h>
30#undef errcode
31#endif
32
33/*
34 * defines for dynamic linking on Win32 platform
35 */
36
37/*
38 * Variables declared in the core backend and referenced by loadable
39 * modules need to be marked "dllimport" in the core build, but
40 * "dllexport" when the declaration is read in a loadable module.
41 * No special markings should be used when compiling frontend code.
42 */
43#ifndef FRONTEND
44#ifdef BUILDING_DLL
45#define PGDLLIMPORT __declspec (dllexport)
46#else
47#define PGDLLIMPORT __declspec (dllimport)
48#endif
49#endif
50
51/*
52 * Functions exported by a loadable module must be marked "dllexport".
53 *
54 * While mingw would otherwise fall back to
55 * __attribute__((visibility("default"))), that appears to only work as long
56 * as no symbols are declared with __declspec(dllexport). But we can end up
57 * with some, e.g. plpython's Py_Init.
58 */
59#define PGDLLEXPORT __declspec (dllexport)