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/*-------------------------------------------------------------------------
*
* mingwcompat.c
* MinGW compatibility functions
*
* Portions Copyright (c) 1996-2011, PostgreSQL Global Development Group
*
* IDENTIFICATION
* src/backend/port/win32/mingwcompat.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#ifndef WIN32_ONLY_COMPILER
/*
* MingW defines an extern to this struct, but the actual struct isn't present
* in any library. It's trivial enough that we can safely define it
* ourselves.
*/
const struct in6_addr in6addr_any = {{{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}};
/*
* This file contains loaders for functions that are missing in the MinGW
* import libraries. It's only for actual Win32 API functions, so they are
* all present in proper Win32 compilers.
*/
static HMODULE kernel32 = NULL;
/*
* Load DLL file just once regardless of how many functions
* we load/call in it.
*/
static void
LoadKernel32()
{
if (kernel32 != NULL)
return;
kernel32 = LoadLibraryEx("kernel32.dll", NULL, 0);
if (kernel32 == NULL)
ereport(FATAL,
(errmsg_internal("could not load kernel32.dll: %d",
(int) GetLastError())));
}
/*
* Replacement for RegisterWaitForSingleObject(), which lives in
* kernel32.dll
*/
typedef
BOOL (WINAPI * __RegisterWaitForSingleObject)
(PHANDLE, HANDLE, WAITORTIMERCALLBACK, PVOID, ULONG, ULONG);
static __RegisterWaitForSingleObject _RegisterWaitForSingleObject = NULL;
BOOL WINAPI
RegisterWaitForSingleObject(PHANDLE phNewWaitObject,
HANDLE hObject,
WAITORTIMERCALLBACK Callback,
PVOID Context,
ULONG dwMilliseconds,
ULONG dwFlags)
{
if (_RegisterWaitForSingleObject == NULL)
{
LoadKernel32();
_RegisterWaitForSingleObject = (__RegisterWaitForSingleObject)
GetProcAddress(kernel32, "RegisterWaitForSingleObject");
if (_RegisterWaitForSingleObject == NULL)
ereport(FATAL,
(errmsg_internal("could not locate RegisterWaitForSingleObject in kernel32.dll: %d",
(int) GetLastError())));
}
return (_RegisterWaitForSingleObject)
(phNewWaitObject, hObject, Callback, Context, dwMilliseconds, dwFlags);
}
#endif
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