Upstream version 9.38.198.0
[platform/framework/web/crosswalk.git] / src / mojo / public / cpp / application / lib / weak_service_provider.h
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_