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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_NOTIFICATION_HELPER_COM_SERVER_MODULE_H_
#define CHROME_NOTIFICATION_HELPER_COM_SERVER_MODULE_H_
#include "base/synchronization/waitable_event.h"
#include "base/win/windows_types.h"
namespace notification_helper {
// This class is used to host the NotificationActivator COM component and serve
// as the module for an out-of-proc COM server.
class ComServerModule {
public:
ComServerModule();
ComServerModule(const ComServerModule&) = delete;
ComServerModule& operator=(const ComServerModule&) = delete;
~ComServerModule();
// Handles object registration and unregistration. Returns when all registered
// objects are released.
HRESULT Run();
// Registers the NotificationActivator COM object so other applications can
// connect to it. Returns the registration status.
HRESULT RegisterClassObjects();
// Unregisters the NotificationActivator COM object. Returns the
// unregistration status.
HRESULT UnregisterClassObjects();
// Returns the state of the event.
bool IsEventSignaled();
private:
// Waits for all instance objects are released from the module.
void WaitForZeroObjectCount();
// Sends out the signal that all objects are now released from the module.
void SignalObjectCountZero();
// Identifiers of registered class objects. Used for unregistration.
DWORD cookies_[1] = {0};
// This event starts "unsignaled", and is signaled when the last instance
// object is released from the module.
base::WaitableEvent object_zero_count_;
};
} // namespace notification_helper
#endif // CHROME_NOTIFICATION_HELPER_COM_SERVER_MODULE_H_
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