1 // Copyright 2015 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_CPP_BINDINGS_ASSOCIATED_GROUP_H_ 6 #define MOJO_PUBLIC_CPP_BINDINGS_ASSOCIATED_GROUP_H_ 7 8 #include "base/callback.h" 9 #include "base/memory/ref_counted.h" 10 #include "mojo/public/cpp/bindings/bindings_export.h" 11 #include "mojo/public/cpp/bindings/scoped_interface_endpoint_handle.h" 12 13 namespace mojo { 14 15 class AssociatedGroupController; 16 17 // AssociatedGroup refers to all the interface endpoints running at one end of a 18 // message pipe. 19 // It is thread safe and cheap to make copies. 20 class MOJO_CPP_BINDINGS_EXPORT AssociatedGroup { 21 public: 22 AssociatedGroup(); 23 24 explicit AssociatedGroup(scoped_refptr<AssociatedGroupController> controller); 25 26 explicit AssociatedGroup(const ScopedInterfaceEndpointHandle& handle); 27 28 AssociatedGroup(const AssociatedGroup& other); 29 30 ~AssociatedGroup(); 31 32 AssociatedGroup& operator=(const AssociatedGroup& other); 33 34 // The return value of this getter if this object is initialized with a 35 // ScopedInterfaceEndpointHandle: 36 // - If the handle is invalid, the return value will always be null. 37 // - If the handle is valid and non-pending, the return value will be 38 // non-null and remain unchanged even if the handle is later reset. 39 // - If the handle is pending asssociation, the return value will initially 40 // be null, change to non-null when/if the handle is associated, and 41 // remain unchanged ever since. 42 AssociatedGroupController* GetController(); 43 44 private: 45 base::Callback<AssociatedGroupController*()> controller_getter_; 46 scoped_refptr<AssociatedGroupController> controller_; 47 }; 48 49 } // namespace mojo 50 51 #endif // MOJO_PUBLIC_CPP_BINDINGS_ASSOCIATED_GROUP_H_ 52
