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85 lines
1.9 KiB
C++
85 lines
1.9 KiB
C++
// Copyright 2017 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/fml/mapping.h"
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#include <fcntl.h>
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#include <type_traits>
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#include "lib/fxl/build_config.h"
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#include <io.h>
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#include <windows.h>
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using PlatformResourceMapping = fml::FileMapping;
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namespace fml {
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Mapping::Mapping() = default;
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Mapping::~Mapping() = default;
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bool PlatformHasResourcesBundle() {
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return !std::is_same<PlatformResourceMapping, FileMapping>::value;
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}
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std::unique_ptr<Mapping> GetResourceMapping(const std::string& resource_name) {
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return std::make_unique<PlatformResourceMapping>(resource_name);
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}
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FileMapping::FileMapping(const std::string& path)
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: size_(0), mapping_(nullptr) {
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HANDLE file_handle_ =
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CreateFileA(reinterpret_cast<LPCSTR>(path.c_str()), GENERIC_READ,
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FILE_SHARE_READ, nullptr, OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, nullptr);
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if (file_handle_ == INVALID_HANDLE_VALUE) {
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return;
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}
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size_ = GetFileSize(file_handle_, nullptr);
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if (size_ == INVALID_FILE_SIZE) {
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size_ = 0;
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return;
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}
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mapping_handle_ = CreateFileMapping(file_handle_, nullptr, PAGE_READONLY, 0,
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size_, nullptr);
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CloseHandle(file_handle_);
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if (mapping_handle_ == INVALID_HANDLE_VALUE) {
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return;
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}
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auto mapping = MapViewOfFile(mapping_handle_, FILE_MAP_READ, 0, 0, size_);
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if (mapping == INVALID_HANDLE_VALUE) {
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CloseHandle(mapping_handle_);
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mapping_handle_ = INVALID_HANDLE_VALUE;
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return;
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}
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mapping_ = static_cast<uint8_t*>(mapping);
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}
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FileMapping::~FileMapping() {
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if (mapping_ != nullptr) {
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UnmapViewOfFile(mapping_);
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CloseHandle(mapping_handle_);
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}
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}
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size_t FileMapping::GetSize() const {
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return size_;
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}
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const uint8_t* FileMapping::GetMapping() const {
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return mapping_;
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}
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} // namespace fml
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