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/*-------------------------------------------------------------------------
*
* win32ntdll.c
* Dynamically loaded Windows NT functions.
*
* Portions Copyright (c) 2021-2023, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/port/win32ntdll.c
*
*-------------------------------------------------------------------------
*/
#include "c.h"
#include "port/win32ntdll.h"
RtlGetLastNtStatus_t pg_RtlGetLastNtStatus;
RtlNtStatusToDosError_t pg_RtlNtStatusToDosError;
NtFlushBuffersFileEx_t pg_NtFlushBuffersFileEx;
typedef struct NtDllRoutine
{
const char *name;
pg_funcptr_t *address;
} NtDllRoutine;
static const NtDllRoutine routines[] = {
{"RtlGetLastNtStatus", (pg_funcptr_t *) &pg_RtlGetLastNtStatus},
{"RtlNtStatusToDosError", (pg_funcptr_t *) &pg_RtlNtStatusToDosError},
{"NtFlushBuffersFileEx", (pg_funcptr_t *) &pg_NtFlushBuffersFileEx}
};
static bool initialized;
int
initialize_ntdll(void)
{
HMODULE module;
if (initialized)
return 0;
if (!(module = LoadLibraryEx("ntdll.dll", NULL, 0)))
{
_dosmaperr(GetLastError());
return -1;
}
for (int i = 0; i < lengthof(routines); ++i)
{
pg_funcptr_t address;
address = (pg_funcptr_t) GetProcAddress(module, routines[i].name);
if (!address)
{
_dosmaperr(GetLastError());
FreeLibrary(module);
return -1;
}
*(pg_funcptr_t *) routines[i].address = address;
}
initialized = true;
return 0;
}
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