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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 <algorithm>
#include "base/bind.h"
#include "base/files/file.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/threading/worker_pool.h"
#include "dbus/file_descriptor.h"
using std::swap;
namespace dbus {
void CHROME_DBUS_EXPORT FileDescriptor::Deleter::operator()(
FileDescriptor* fd) {
base::WorkerPool::PostTask(
FROM_HERE, base::Bind(&base::DeletePointer<FileDescriptor>, fd), false);
}
FileDescriptor::FileDescriptor(RValue other)
: value_(-1), owner_(false), valid_(false) {
Swap(other.object);
}
FileDescriptor::~FileDescriptor() {
if (owner_)
base::File auto_closer(value_);
}
FileDescriptor& FileDescriptor::operator=(RValue other) {
Swap(other.object);
return *this;
}
int FileDescriptor::value() const {
CHECK(valid_);
return value_;
}
int FileDescriptor::TakeValue() {
CHECK(valid_); // NB: check first so owner_ is unchanged if this triggers
owner_ = false;
return value_;
}
void FileDescriptor::CheckValidity() {
base::File file(value_);
if (!file.IsValid()) {
valid_ = false;
return;
}
base::File::Info info;
bool ok = file.GetInfo(&info);
file.TakePlatformFile(); // Prevent |value_| from being closed by |file|.
valid_ = (ok && !info.is_directory);
}
void FileDescriptor::Swap(FileDescriptor* other) {
swap(value_, other->value_);
swap(owner_, other->owner_);
swap(valid_, other->valid_);
}
} // namespace dbus
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