mirror of
https://github.com/klzgrad/naiveproxy.git
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74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
// Copyright 2017 The Chromium Authors
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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 "base/file_descriptor_store.h"
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#include <utility>
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#include "base/logging.h"
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namespace base {
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FileDescriptorStore::Descriptor::Descriptor(const std::string& key,
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base::ScopedFD fd)
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: key(key),
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fd(std::move(fd)),
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region(base::MemoryMappedFile::Region::kWholeFile) {}
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FileDescriptorStore::Descriptor::Descriptor(
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const std::string& key,
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base::ScopedFD fd,
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base::MemoryMappedFile::Region region)
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: key(key), fd(std::move(fd)), region(region) {}
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FileDescriptorStore::Descriptor::Descriptor(
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FileDescriptorStore::Descriptor&& other)
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: key(other.key), fd(std::move(other.fd)), region(other.region) {}
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FileDescriptorStore::Descriptor::~Descriptor() = default;
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// static
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FileDescriptorStore& FileDescriptorStore::GetInstance() {
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static FileDescriptorStore* store = new FileDescriptorStore;
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return *store;
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}
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base::ScopedFD FileDescriptorStore::TakeFD(
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const std::string& key,
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base::MemoryMappedFile::Region* region) {
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base::ScopedFD fd = MaybeTakeFD(key, region);
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if (!fd.is_valid())
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DLOG(FATAL) << "Unknown global descriptor: " << key;
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return fd;
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}
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base::ScopedFD FileDescriptorStore::MaybeTakeFD(
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const std::string& key,
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base::MemoryMappedFile::Region* region) {
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auto iter = descriptors_.find(key);
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if (iter == descriptors_.end())
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return base::ScopedFD();
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*region = iter->second.region;
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base::ScopedFD result = std::move(iter->second.fd);
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descriptors_.erase(iter);
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return result;
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}
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void FileDescriptorStore::Set(const std::string& key, base::ScopedFD fd) {
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Set(key, std::move(fd), base::MemoryMappedFile::Region::kWholeFile);
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}
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void FileDescriptorStore::Set(const std::string& key,
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base::ScopedFD fd,
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base::MemoryMappedFile::Region region) {
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Descriptor descriptor(key, std::move(fd), region);
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descriptors_.insert(std::make_pair(key, std::move(descriptor)));
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}
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FileDescriptorStore::FileDescriptorStore() = default;
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FileDescriptorStore::~FileDescriptorStore() = default;
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} // namespace base
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