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// Copyright (c) 2013 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.
#ifndef CHROME_BROWSER_PROCESS_SINGLETON_STARTUP_LOCK_H_
#define CHROME_BROWSER_PROCESS_SINGLETON_STARTUP_LOCK_H_
#include <set>
#include <utility>
#include <vector>
#include "base/basictypes.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/threading/non_thread_safe.h"
#include "chrome/browser/process_singleton.h"
// Provides a ProcessSingleton::NotificationCallback that can queue up
// command-line invocations during startup and execute them when startup
// completes.
//
// The object starts in a locked state. |Unlock()| must be called
// when the process is prepared to handle command-line invocations.
//
// Once unlocked, notifications are forwarded to a wrapped NotificationCallback.
class ProcessSingletonStartupLock : public base::NonThreadSafe {
public:
explicit ProcessSingletonStartupLock(
const ProcessSingleton::NotificationCallback& original_callback);
~ProcessSingletonStartupLock();
// Returns the ProcessSingleton::NotificationCallback.
// The callback is only valid during the lifetime of the
// ProcessSingletonStartupLock instance.
ProcessSingleton::NotificationCallback AsNotificationCallback();
// Executes previously queued command-line invocations and allows future
// invocations to be executed immediately.
void Unlock();
bool locked() { return locked_; }
private:
typedef std::pair<CommandLine::StringVector, base::FilePath>
DelayedStartupMessage;
bool NotificationCallbackImpl(const CommandLine& command_line,
const base::FilePath& current_directory);
bool locked_;
std::vector<DelayedStartupMessage> saved_startup_messages_;
ProcessSingleton::NotificationCallback original_callback_;
DISALLOW_COPY_AND_ASSIGN(ProcessSingletonStartupLock);
};
#endif // CHROME_BROWSER_PROCESS_SINGLETON_STARTUP_LOCK_H_
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