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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_CPP_BINDINGS_STRONG_BINDING_H_ |
| 6 #define MOJO_PUBLIC_CPP_BINDINGS_STRONG_BINDING_H_ |
| 7 |
| 8 #include "mojo/public/c/environment/async_waiter.h" |
| 9 #include "mojo/public/cpp/bindings/binding.h" |
| 10 #include "mojo/public/cpp/bindings/error_handler.h" |
| 11 #include "mojo/public/cpp/bindings/interface_ptr.h" |
| 12 #include "mojo/public/cpp/bindings/interface_request.h" |
| 13 #include "mojo/public/cpp/bindings/lib/filter_chain.h" |
| 14 #include "mojo/public/cpp/bindings/lib/message_header_validator.h" |
| 15 #include "mojo/public/cpp/bindings/lib/router.h" |
| 16 #include "mojo/public/cpp/system/core.h" |
| 17 |
| 18 namespace mojo { |
| 19 |
| 20 // This connects an interface implementation strongly to a pipe. When a |
| 21 // connection error is detected the implementation is deleted. Deleting the |
| 22 // connector also closes the pipe. |
| 23 // |
| 24 // Example of an implementation that is always bound strongly to a pipe |
| 25 // |
| 26 // class StronglyBound : public Foo { |
| 27 // public: |
| 28 // explicit StronglyBound(ScopedMessagePipeHandle handle) |
| 29 // : binding_(this, handle.Pass()) {} |
| 30 // |
| 31 // // Foo implementation here |
| 32 // |
| 33 // private: |
| 34 // StrongBinding<Foo> binding_; |
| 35 // }; |
| 36 // |
| 37 template <typename Interface> |
| 38 class StrongBinding : public ErrorHandler { |
| 39 public: |
| 40 explicit StrongBinding(Interface* impl) : binding_(impl) { |
| 41 binding_.set_error_handler(this); |
| 42 } |
| 43 |
| 44 StrongBinding( |
| 45 Interface* impl, |
| 46 ScopedMessagePipeHandle handle, |
| 47 const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter()) |
| 48 : StrongBinding(impl) { |
| 49 binding_.Bind(handle.Pass(), waiter); |
| 50 } |
| 51 |
| 52 StrongBinding( |
| 53 Interface* impl, |
| 54 InterfaceRequest<Interface> request, |
| 55 const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter()) |
| 56 : StrongBinding(impl) { |
| 57 binding_.Bind(request.Pass(), waiter); |
| 58 } |
| 59 |
| 60 ~StrongBinding() override {} |
| 61 |
| 62 bool WaitForIncomingMethodCall() { |
| 63 return binding_.WaitForIncomingMethodCall(); |
| 64 } |
| 65 |
| 66 void set_error_handler(ErrorHandler* error_handler) { |
| 67 error_handler_ = error_handler; |
| 68 } |
| 69 |
| 70 typename Interface::Client* client() { return binding_.client(); } |
| 71 // Exposed for testing, should not generally be used. |
| 72 internal::Router* internal_router() { return binding_.internal_router(); } |
| 73 |
| 74 // ErrorHandler implementation |
| 75 void OnConnectionError() override { |
| 76 if (error_handler_) |
| 77 error_handler_->OnConnectionError(); |
| 78 delete binding_.impl(); |
| 79 } |
| 80 |
| 81 private: |
| 82 ErrorHandler* error_handler_ = nullptr; |
| 83 Binding<Interface> binding_; |
| 84 }; |
| 85 |
| 86 } // namespace mojo |
| 87 |
| 88 #endif // MOJO_PUBLIC_CPP_BINDINGS_STRONG_BINDING_H_ |
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