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https://github.com/c64scene-ar/llvm-6502.git
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bdbd2d710c
and shared. This complicates the design, is not used, and probably doesn't even work. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49022 91177308-0d34-0410-b5e6-96231b3b80d8
105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
//===- Win32/MappedFile.cpp - Win32 MappedFile Implementation ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides the Win32 implementation of the MappedFile concept.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only Win32 code.
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//===----------------------------------------------------------------------===//
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#include "Win32.h"
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#include "llvm/System/Process.h"
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namespace llvm {
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using namespace sys;
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struct sys::MappedFileInfo {
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HANDLE hFile;
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HANDLE hMapping;
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size_t size;
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};
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bool MappedFile::initialize(std::string* ErrMsg) {
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assert(!MapInfo);
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MapInfo = new MappedFileInfo;
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MapInfo->hFile = INVALID_HANDLE_VALUE;
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MapInfo->hMapping = NULL;
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MapInfo->hFile = CreateFile(Path.c_str(), GENERIC_READ, 0, NULL,
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OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
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if (MapInfo->hFile == INVALID_HANDLE_VALUE) {
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delete MapInfo;
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MapInfo = NULL;
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return MakeErrMsg(ErrMsg,
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std::string("Can't open file: ") + Path.toString());
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}
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LARGE_INTEGER size;
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if (!GetFileSizeEx(MapInfo->hFile, &size) ||
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(MapInfo->size = size_t(size.QuadPart), MapInfo->size != size.QuadPart)) {
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CloseHandle(MapInfo->hFile);
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delete MapInfo;
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MapInfo = NULL;
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return MakeErrMsg(ErrMsg,
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std::string("Can't get size of file: ") + Path.toString());
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}
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return false;
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}
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void MappedFile::terminate() {
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unmap();
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if (MapInfo->hFile != INVALID_HANDLE_VALUE)
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CloseHandle(MapInfo->hFile);
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delete MapInfo;
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MapInfo = NULL;
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}
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void MappedFile::unmap() {
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assert(MapInfo && "MappedFile not initialized");
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if (isMapped()) {
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UnmapViewOfFile(BasePtr);
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BasePtr = NULL;
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}
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if (MapInfo->hMapping != INVALID_HANDLE_VALUE) {
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CloseHandle(MapInfo->hMapping);
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MapInfo->hMapping = NULL;
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}
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}
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void* MappedFile::map(std::string* ErrMsg) {
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if (!isMapped()) {
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MapInfo->hMapping = CreateFileMapping(MapInfo->hFile, NULL, PAGE_READONLY,
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0, 0, NULL);
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if (MapInfo->hMapping == NULL) {
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MakeErrMsg(ErrMsg, std::string("Can't map file: ") + Path.toString());
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return 0;
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}
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BasePtr = MapViewOfFileEx(MapInfo->hMapping, FILE_MAP_READ, 0, 0, 0, NULL);
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if (BasePtr == NULL) {
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CloseHandle(MapInfo->hMapping);
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MapInfo->hMapping = NULL;
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MakeErrMsg(ErrMsg, std::string("Can't map file: ") + Path.toString());
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return 0;
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}
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}
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return BasePtr;
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}
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size_t MappedFile::size() const {
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assert(MapInfo && "MappedFile not initialized");
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return MapInfo->size;
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}
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}
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