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