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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef MOJO_PUBLIC_APPLICATION_LIB_WEAK_SERVICE_PROVIDER_H_ | |
| 6 #define MOJO_PUBLIC_APPLICATION_LIB_WEAK_SERVICE_PROVIDER_H_ | |
| 7 | |
| 8 #include "mojo/public/interfaces/application/service_provider.mojom.h" | |
| 9 | |
| 10 namespace mojo { | |
| 11 class ServiceProviderImpl; | |
| 12 namespace internal { | |
| 13 class ServiceConnectorBase; | |
| 14 | |
| 15 // Implements a weak pointer to a ServiceProvider. Necessary as the lifetime of | |
| 16 // the ServiceProviderImpl is bound to that of its pipe, but code may continue | |
| 17 // to reference a remote service provider beyond the lifetime of said pipe. | |
| 18 // Calls to ConnectToService() are silently dropped when the pipe is closed. | |
| 19 class WeakServiceProvider : public ServiceProvider { | |
| 20 public: | |
| 21 WeakServiceProvider(ServiceProviderImpl* creator, | |
| 22 ServiceProvider* service_provider); | |
| 23 ~WeakServiceProvider() override; | |
| 24 | |
| 25 void Clear(); | |
| 26 | |
| 27 private: | |
| 28 // Overridden from ServiceProvider: | |
| 29 void ConnectToService(const String& service_name, | |
| 30 ScopedMessagePipeHandle client_handle) override; | |
| 31 | |
| 32 ServiceProviderImpl* creator_; | |
| 33 ServiceProvider* service_provider_; | |
| 34 | |
| 35 MOJO_DISALLOW_COPY_AND_ASSIGN(WeakServiceProvider); | |
| 36 }; | |
| 37 | |
| 38 } // namespace internal | |
| 39 } // namespace mojo | |
| 40 | |
| 41 #endif // MOJO_PUBLIC_APPLICATION_LIB_WEAK_SERVICE_PROVIDER_H_ | |
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