74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
|
// 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
|