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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_LIB_INTERFACE_IMPL_INTERNAL_H_ |
| 6 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_IMPL_INTERNAL_H_ |
| 7 |
| 8 #include "mojo/public/cpp/bindings/error_handler.h" |
| 9 #include "mojo/public/cpp/bindings/interface_ptr.h" |
| 10 #include "mojo/public/cpp/bindings/lib/filter_chain.h" |
| 11 #include "mojo/public/cpp/bindings/lib/message_header_validator.h" |
| 12 #include "mojo/public/cpp/environment/environment.h" |
| 13 #include "mojo/public/cpp/environment/logging.h" |
| 14 #include "mojo/public/cpp/system/macros.h" |
| 15 |
| 16 namespace mojo { |
| 17 namespace internal { |
| 18 |
| 19 template <typename Interface> |
| 20 class InterfaceImplBase : public Interface { |
| 21 public: |
| 22 virtual ~InterfaceImplBase() {} |
| 23 virtual void OnConnectionEstablished() = 0; |
| 24 virtual void OnConnectionError() = 0; |
| 25 }; |
| 26 |
| 27 template <typename Interface> |
| 28 class InterfaceImplState : public ErrorHandler { |
| 29 public: |
| 30 typedef typename Interface::Client Client; |
| 31 |
| 32 explicit InterfaceImplState(InterfaceImplBase<Interface>* instance) |
| 33 : router_(nullptr), |
| 34 proxy_(nullptr), |
| 35 instance_bound_to_pipe_(false) |
| 36 #ifndef NDEBUG |
| 37 , |
| 38 deleting_instance_due_to_error_(false) |
| 39 #endif |
| 40 { |
| 41 MOJO_DCHECK(instance); |
| 42 stub_.set_sink(instance); |
| 43 } |
| 44 |
| 45 virtual ~InterfaceImplState() { |
| 46 #ifndef NDEBUG |
| 47 MOJO_DCHECK(!instance_bound_to_pipe_ || deleting_instance_due_to_error_); |
| 48 #endif |
| 49 delete proxy_; |
| 50 if (router_) { |
| 51 router_->set_error_handler(nullptr); |
| 52 delete router_; |
| 53 } |
| 54 } |
| 55 |
| 56 void BindProxy( |
| 57 InterfacePtr<Interface>* ptr, |
| 58 bool instance_bound_to_pipe, |
| 59 const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter()) { |
| 60 MessagePipe pipe; |
| 61 ptr->Bind(pipe.handle0.Pass(), waiter); |
| 62 Bind(pipe.handle1.Pass(), instance_bound_to_pipe, waiter); |
| 63 } |
| 64 |
| 65 void Bind(ScopedMessagePipeHandle handle, |
| 66 bool instance_bound_to_pipe, |
| 67 const MojoAsyncWaiter* waiter) { |
| 68 MOJO_CHECK(!router_); |
| 69 |
| 70 FilterChain filters; |
| 71 filters.Append<MessageHeaderValidator>(); |
| 72 filters.Append<typename Interface::RequestValidator_>(); |
| 73 filters.Append<typename Interface::Client::ResponseValidator_>(); |
| 74 |
| 75 router_ = new Router(handle.Pass(), filters.Pass(), waiter); |
| 76 router_->set_incoming_receiver(&stub_); |
| 77 router_->set_error_handler(this); |
| 78 |
| 79 proxy_ = new typename Client::Proxy_(router_); |
| 80 |
| 81 instance_bound_to_pipe_ = instance_bound_to_pipe; |
| 82 |
| 83 instance()->OnConnectionEstablished(); |
| 84 } |
| 85 |
| 86 bool WaitForIncomingMethodCall() { |
| 87 MOJO_DCHECK(router_); |
| 88 return router_->WaitForIncomingMessage(); |
| 89 } |
| 90 |
| 91 Router* router() { return router_; } |
| 92 Client* client() { return proxy_; } |
| 93 |
| 94 private: |
| 95 InterfaceImplBase<Interface>* instance() { |
| 96 return static_cast<InterfaceImplBase<Interface>*>(stub_.sink()); |
| 97 } |
| 98 |
| 99 virtual void OnConnectionError() override { |
| 100 // If the the instance is not bound to the pipe, the instance might choose |
| 101 // to delete itself in the OnConnectionError handler, which would in turn |
| 102 // delete this. Save the error behavior before invoking the error handler |
| 103 // so we can correctly decide what to do. |
| 104 bool bound = instance_bound_to_pipe_; |
| 105 instance()->OnConnectionError(); |
| 106 if (!bound) |
| 107 return; |
| 108 #ifndef NDEBUG |
| 109 deleting_instance_due_to_error_ = true; |
| 110 #endif |
| 111 delete instance(); |
| 112 } |
| 113 |
| 114 Router* router_; |
| 115 typename Client::Proxy_* proxy_; |
| 116 typename Interface::Stub_ stub_; |
| 117 bool instance_bound_to_pipe_; |
| 118 #ifndef NDEBUG |
| 119 bool deleting_instance_due_to_error_; |
| 120 #endif |
| 121 |
| 122 MOJO_DISALLOW_COPY_AND_ASSIGN(InterfaceImplState); |
| 123 }; |
| 124 |
| 125 } // namespace internal |
| 126 } // namespace mojo |
| 127 |
| 128 #endif // MOJO_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_IMPL_INTERNAL_H_ |
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