12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273 |
- // Copyright 2017 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "base/file_descriptor_store.h"
- #include <utility>
- #include "base/logging.h"
- namespace base {
- FileDescriptorStore::Descriptor::Descriptor(const std::string& key,
- base::ScopedFD fd)
- : key(key),
- fd(std::move(fd)),
- region(base::MemoryMappedFile::Region::kWholeFile) {}
- FileDescriptorStore::Descriptor::Descriptor(
- const std::string& key,
- base::ScopedFD fd,
- base::MemoryMappedFile::Region region)
- : key(key), fd(std::move(fd)), region(region) {}
- FileDescriptorStore::Descriptor::Descriptor(
- FileDescriptorStore::Descriptor&& other)
- : key(other.key), fd(std::move(other.fd)), region(other.region) {}
- FileDescriptorStore::Descriptor::~Descriptor() = default;
- // static
- FileDescriptorStore& FileDescriptorStore::GetInstance() {
- static FileDescriptorStore* store = new FileDescriptorStore;
- return *store;
- }
- base::ScopedFD FileDescriptorStore::TakeFD(
- const std::string& key,
- base::MemoryMappedFile::Region* region) {
- base::ScopedFD fd = MaybeTakeFD(key, region);
- if (!fd.is_valid())
- DLOG(DCHECK) << "Unknown global descriptor: " << key;
- return fd;
- }
- base::ScopedFD FileDescriptorStore::MaybeTakeFD(
- const std::string& key,
- base::MemoryMappedFile::Region* region) {
- auto iter = descriptors_.find(key);
- if (iter == descriptors_.end())
- return base::ScopedFD();
- *region = iter->second.region;
- base::ScopedFD result = std::move(iter->second.fd);
- descriptors_.erase(iter);
- return result;
- }
- void FileDescriptorStore::Set(const std::string& key, base::ScopedFD fd) {
- Set(key, std::move(fd), base::MemoryMappedFile::Region::kWholeFile);
- }
- void FileDescriptorStore::Set(const std::string& key,
- base::ScopedFD fd,
- base::MemoryMappedFile::Region region) {
- Descriptor descriptor(key, std::move(fd), region);
- descriptors_.insert(std::make_pair(key, std::move(descriptor)));
- }
- FileDescriptorStore::FileDescriptorStore() = default;
- FileDescriptorStore::~FileDescriptorStore() = default;
- } // namespace base
|