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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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