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// 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(FATAL) << "Unknown global descriptor: " << key;
return ret;
}
int GlobalDescriptors::MaybeGet(Key key) const {
for (Mapping::const_iterator
i = descriptors_.begin(); i != descriptors_.end(); ++i) {
if (i->key == key)
return i->fd;
}
return -1;
}
base::ScopedFD GlobalDescriptors::TakeFD(
Key key,
base::MemoryMappedFile::Region* region) {
base::ScopedFD fd;
for (Mapping::iterator 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(FATAL) << "Unknown global descriptor: " << key;
return base::MemoryMappedFile::Region::kWholeFile;
}
void GlobalDescriptors::Reset(const Mapping& mapping) {
descriptors_ = mapping;
}
GlobalDescriptors::GlobalDescriptors() {}
GlobalDescriptors::~GlobalDescriptors() {}
} // namespace base
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