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 virtual ~WeakServiceProvider(); 24 25 void Clear(); 26 27 private: 28 // Overridden from ServiceProvider: 29 virtual void ConnectToService( 30 const String& service_name, 31 ScopedMessagePipeHandle client_handle) MOJO_OVERRIDE; 32 33 ServiceProviderImpl* creator_; 34 ServiceProvider* service_provider_; 35 36 MOJO_DISALLOW_COPY_AND_ASSIGN(WeakServiceProvider); 37 }; 38 39 } // namespace internal 40 } // namespace mojo 41 42 #endif // MOJO_PUBLIC_APPLICATION_LIB_WEAK_SERVICE_PROVIDER_H_ 43