100 lines
2.4 KiB
C++
100 lines
2.4 KiB
C++
|
// Copyright (c) 2012 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/posix/global_descriptors.h"
|
||
|
|
|
||
|
|
#include <vector>
|
||
|
|
#include <utility>
|
||
|
|
|
||
|
|
#include "base/logging.h"
|
||
|
|
|
||
|
|
namespace base {
|
||
|
|
|
||
|
|
GlobalDescriptors::Descriptor::Descriptor(Key key, int fd)
|
||
|
|
: key(key), fd(fd), region(base::MemoryMappedFile::Region::kWholeFile) {
|
||
|
|
}
|
||
|
|
|
||
|
|
GlobalDescriptors::Descriptor::Descriptor(Key key,
|
||
|
|
int fd,
|
||
|
|
base::MemoryMappedFile::Region region)
|
||
|
|
: key(key), fd(fd), region(region) {
|
||
|
|
}
|
||
|
|
|
||
|
|
// static
|
||
|
|
GlobalDescriptors* GlobalDescriptors::GetInstance() {
|
||
|
|
typedef Singleton<base::GlobalDescriptors,
|
||
|
|
LeakySingletonTraits<base::GlobalDescriptors> >
|
||
|
|
GlobalDescriptorsSingleton;
|
||
|
|
return GlobalDescriptorsSingleton::get();
|
||
|
|
}
|
||
|
|
|
||
|
|
int GlobalDescriptors::Get(Key key) const {
|
||
|
|
const int ret = MaybeGet(key);
|
||
|
|
|
||
|
|
if (ret == -1)
|
||
|
|
DLOG(DCHECK) << "Unknown global descriptor: " << key;
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
int GlobalDescriptors::MaybeGet(Key key) const {
|
||
|
|
for (const auto& i : descriptors_) {
|
||
|
|
if (i.key == key)
|
||
|
|
return i.fd;
|
||
|
|
}
|
||
|
|
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
base::ScopedFD GlobalDescriptors::TakeFD(
|
||
|
|
Key key,
|
||
|
|
base::MemoryMappedFile::Region* region) {
|
||
|
|
base::ScopedFD fd;
|
||
|
|
for (auto i = descriptors_.begin(); i != descriptors_.end(); ++i) {
|
||
|
|
if (i->key == key) {
|
||
|
|
*region = i->region;
|
||
|
|
fd.reset(i->fd);
|
||
|
|
descriptors_.erase(i);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return fd;
|
||
|
|
}
|
||
|
|
|
||
|
|
void GlobalDescriptors::Set(Key key, int fd) {
|
||
|
|
Set(key, fd, base::MemoryMappedFile::Region::kWholeFile);
|
||
|
|
}
|
||
|
|
|
||
|
|
void GlobalDescriptors::Set(Key key,
|
||
|
|
int fd,
|
||
|
|
base::MemoryMappedFile::Region region) {
|
||
|
|
for (auto& i : descriptors_) {
|
||
|
|
if (i.key == key) {
|
||
|
|
i.fd = fd;
|
||
|
|
i.region = region;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
descriptors_.push_back(Descriptor(key, fd, region));
|
||
|
|
}
|
||
|
|
|
||
|
|
base::MemoryMappedFile::Region GlobalDescriptors::GetRegion(Key key) const {
|
||
|
|
for (const auto& i : descriptors_) {
|
||
|
|
if (i.key == key)
|
||
|
|
return i.region;
|
||
|
|
}
|
||
|
|
DLOG(DCHECK) << "Unknown global descriptor: " << key;
|
||
|
|
return base::MemoryMappedFile::Region::kWholeFile;
|
||
|
|
}
|
||
|
|
|
||
|
|
void GlobalDescriptors::Reset(const Mapping& mapping) {
|
||
|
|
descriptors_ = mapping;
|
||
|
|
}
|
||
|
|
|
||
|
|
GlobalDescriptors::GlobalDescriptors() = default;
|
||
|
|
|
||
|
|
GlobalDescriptors::~GlobalDescriptors() = default;
|
||
|
|
|
||
|
|
} // namespace base
|