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Side by Side Diff: mojo/public/cpp/bindings/binding.h

Issue 814543006: Move //mojo/{public, edk} underneath //third_party (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Rebase Created 5 years, 11 months ago
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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_BINDING_H_
6 #define MOJO_PUBLIC_CPP_BINDINGS_BINDING_H_
7
8 #include "mojo/public/c/environment/async_waiter.h"
9 #include "mojo/public/cpp/bindings/error_handler.h"
10 #include "mojo/public/cpp/bindings/interface_ptr.h"
11 #include "mojo/public/cpp/bindings/interface_request.h"
12 #include "mojo/public/cpp/bindings/lib/filter_chain.h"
13 #include "mojo/public/cpp/bindings/lib/message_header_validator.h"
14 #include "mojo/public/cpp/bindings/lib/router.h"
15 #include "mojo/public/cpp/environment/logging.h"
16 #include "mojo/public/cpp/system/core.h"
17
18 namespace mojo {
19
20 // This binds an interface implementation a pipe. Deleting the binding closes
21 // the pipe.
22 //
23 // Example:
24 //
25 // #include "foo.mojom.h"
26 //
27 // class FooImpl : public Foo {
28 // public:
29 // explicit FooImpl(InterfaceRequest<Foo> request)
30 // : binding_(this, request.Pass()) {}
31 //
32 // // Foo implementation here.
33 //
34 // private:
35 // Binding<Foo> binding_;
36 // };
37 //
38 // class MyFooFactory : public InterfaceFactory<Foo> {
39 // public:
40 // void Create(..., InterfaceRequest<Foo> request) override {
41 // auto f = new FooImpl(request.Pass());
42 // // Do something to manage the lifetime of |f|. Use StrongBinding<> to
43 // // delete FooImpl on connection errors.
44 // }
45 // };
46 template <typename Interface>
47 class Binding : public ErrorHandler {
48 public:
49 using Client = typename Interface::Client;
50
51 explicit Binding(Interface* impl) : impl_(impl) { stub_.set_sink(impl_); }
52
53 Binding(Interface* impl,
54 ScopedMessagePipeHandle handle,
55 const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter())
56 : Binding(impl) {
57 Bind(handle.Pass(), waiter);
58 }
59
60 Binding(Interface* impl,
61 InterfacePtr<Interface>* ptr,
62 const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter())
63 : Binding(impl) {
64 Bind(ptr, waiter);
65 }
66
67 Binding(Interface* impl,
68 InterfaceRequest<Interface> request,
69 const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter())
70 : Binding(impl) {
71 Bind(request.PassMessagePipe(), waiter);
72 }
73
74 ~Binding() override {
75 delete proxy_;
76 if (internal_router_) {
77 internal_router_->set_error_handler(nullptr);
78 delete internal_router_;
79 }
80 }
81
82 void Bind(
83 ScopedMessagePipeHandle handle,
84 const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter()) {
85 internal::FilterChain filters;
86 filters.Append<internal::MessageHeaderValidator>();
87 filters.Append<typename Interface::RequestValidator_>();
88 filters.Append<typename Client::ResponseValidator_>();
89
90 internal_router_ =
91 new internal::Router(handle.Pass(), filters.Pass(), waiter);
92 internal_router_->set_incoming_receiver(&stub_);
93 internal_router_->set_error_handler(this);
94
95 proxy_ = new typename Client::Proxy_(internal_router_);
96 }
97
98 void Bind(
99 InterfacePtr<Interface>* ptr,
100 const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter()) {
101 MessagePipe pipe;
102 ptr->Bind(pipe.handle0.Pass(), waiter);
103 Bind(pipe.handle1.Pass(), waiter);
104 }
105
106 void Bind(
107 InterfaceRequest<Interface> request,
108 const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter()) {
109 Bind(request.PassMessagePipe(), waiter);
110 }
111
112 bool WaitForIncomingMethodCall() {
113 MOJO_DCHECK(internal_router_);
114 return internal_router_->WaitForIncomingMessage();
115 }
116
117 void Close() {
118 MOJO_DCHECK(internal_router_);
119 internal_router_->CloseMessagePipe();
120 }
121
122 void set_error_handler(ErrorHandler* error_handler) {
123 error_handler_ = error_handler;
124 }
125
126 // ErrorHandler implementation
127 void OnConnectionError() override {
128 if (error_handler_)
129 error_handler_->OnConnectionError();
130 }
131
132 Interface* impl() { return impl_; }
133 Client* client() { return proxy_; }
134
135 bool is_bound() const { return !!internal_router_; }
136
137 // Exposed for testing, should not generally be used.
138 internal::Router* internal_router() { return internal_router_; }
139
140 private:
141 internal::Router* internal_router_ = nullptr;
142 typename Client::Proxy_* proxy_ = nullptr;
143 typename Interface::Stub_ stub_;
144 Interface* impl_;
145 ErrorHandler* error_handler_ = nullptr;
146
147 MOJO_DISALLOW_COPY_AND_ASSIGN(Binding);
148 };
149
150 } // namespace mojo
151
152 #endif // MOJO_PUBLIC_CPP_BINDINGS_BINDING_H_
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