53 lines
2 KiB
C
53 lines
2 KiB
C
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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 ATOM_BROWSER_ATOM_PROCESS_SINGLETON_H_
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#define ATOM_BROWSER_ATOM_PROCESS_SINGLETON_H_
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#include "base/basictypes.h"
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#include "base/files/file_path.h"
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#include "atom/browser/process_singleton.h"
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#include "atom/browser/process_singleton_startup_lock.h"
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// Composes a basic ProcessSingleton with ProcessSingletonStartupLock
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class AtomProcessSingleton {
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public:
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AtomProcessSingleton(
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const base::FilePath& user_data_dir,
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const ProcessSingleton::NotificationCallback& notification_callback);
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~AtomProcessSingleton();
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// Notify another process, if available. Otherwise sets ourselves as the
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// singleton instance. Returns PROCESS_NONE if we became the singleton
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// instance. Callers are guaranteed to either have notified an existing
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// process or have grabbed the singleton (unless the profile is locked by an
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// unreachable process).
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ProcessSingleton::NotifyResult NotifyOtherProcessOrCreate();
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// Clear any lock state during shutdown.
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void Cleanup();
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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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// This only has an effect the first time it is called.
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void Unlock();
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private:
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// We compose these two locks with the client-supplied notification callback.
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// First |modal_dialog_lock_| will discard any notifications that arrive while
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// a modal dialog is active. Otherwise, it will pass the notification to
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// |startup_lock_|, which will queue notifications until |Unlock()| is called.
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// Notifications passing through both locks are finally delivered to our
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// client.
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ProcessSingletonStartupLock startup_lock_;
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// The basic ProcessSingleton
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ProcessSingleton process_singleton_;
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DISALLOW_COPY_AND_ASSIGN(AtomProcessSingleton);
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};
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#endif // ATOM_BROWSER_ATOM_PROCESS_SINGLETON_H_
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