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58e84c8bf0
* Re-land "Support multiple shells in a single process. (#4932)" This reverts commit 723c7d01439da4261bc836075fb55651ce9e7f03.
88 lines
2.3 KiB
C++
88 lines
2.3 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 <io.h>
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#include <windows.h>
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#include <type_traits>
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#include "flutter/fml/file.h"
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#include "flutter/fml/platform/win/wstring_conversion.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, bool executable)
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: FileMapping(OpenFile(path.c_str(),
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executable ? OpenPermission::kExecute
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: OpenPermission::kRead,
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false),
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executable) {}
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FileMapping::FileMapping(const fml::UniqueFD& fd, bool executable)
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: size_(0), mapping_(nullptr) {
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if (!fd.is_valid()) {
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return;
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}
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if (auto size = ::GetFileSize(fd.get(), nullptr)) {
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if (size > 0) {
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size_ = size;
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} else {
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return;
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}
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}
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const DWORD protect = executable ? PAGE_EXECUTE_READ : PAGE_READONLY;
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mapping_handle_.reset(::CreateFileMapping(fd.get(), // hFile
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nullptr, // lpAttributes
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protect, // flProtect
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0, // dwMaximumSizeHigh
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0, // dwMaximumSizeLow
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nullptr // lpName
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));
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if (!mapping_handle_.is_valid()) {
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return;
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}
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const DWORD desired_access = executable ? FILE_MAP_ALL_ACCESS : FILE_MAP_READ;
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mapping_ = reinterpret_cast<uint8_t*>(
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MapViewOfFile(mapping_handle_.get(), desired_access, 0, 0, size_));
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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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}
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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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