Home | History | Annotate | Download | only in lib 
      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