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97 lines
2.5 KiB
C++
97 lines
2.5 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef MOJO_COMMON_WEAK_BINDING_SET_H_
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#define MOJO_COMMON_WEAK_BINDING_SET_H_
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#include <algorithm>
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#include <vector>
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#include "base/memory/weak_ptr.h"
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#include "mojo/public/cpp/bindings/binding.h"
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namespace mojo {
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namespace internal {
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// TODO(vtl): https://github.com/domokit/mojo/issues/311 applies here as well.
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template <typename Interface>
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class WeakBinding {
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public:
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WeakBinding(Interface* impl, InterfaceRequest<Interface> request)
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: binding_(impl, request.Pass()), weak_ptr_factory_(this) {
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binding_.set_connection_error_handler([this]() { OnConnectionError(); });
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}
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~WeakBinding() {}
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void set_connection_error_handler(const Closure& error_handler) {
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error_handler_ = error_handler;
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}
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base::WeakPtr<WeakBinding> GetWeakPtr() {
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return weak_ptr_factory_.GetWeakPtr();
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}
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void Close() { binding_.Close(); }
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private:
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void OnConnectionError() {
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Closure error_handler = error_handler_;
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delete this;
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error_handler.Run();
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}
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mojo::Binding<Interface> binding_;
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Closure error_handler_;
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base::WeakPtrFactory<WeakBinding> weak_ptr_factory_;
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DISALLOW_COPY_AND_ASSIGN(WeakBinding);
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};
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} // namespace internal
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// Use this class to manage a set of weak pointers to bindings each of which is
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// owned by the pipe they are bound to.
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template <typename Interface>
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class WeakBindingSet {
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public:
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WeakBindingSet() {}
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~WeakBindingSet() { CloseAllBindings(); }
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void AddBinding(Interface* impl, InterfaceRequest<Interface> request) {
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auto binding = new internal::WeakBinding<Interface>(impl, request.Pass());
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binding->set_connection_error_handler([this]() { OnConnectionError(); });
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bindings_.push_back(binding->GetWeakPtr());
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}
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void CloseAllBindings() {
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for (const auto& it : bindings_) {
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if (it)
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it->Close();
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}
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bindings_.clear();
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}
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private:
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void OnConnectionError() {
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// Clear any deleted bindings.
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bindings_.erase(
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std::remove_if(
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bindings_.begin(), bindings_.end(),
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[](const base::WeakPtr<internal::WeakBinding<Interface>>& p) {
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return p.get() == nullptr;
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}),
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bindings_.end());
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}
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std::vector<base::WeakPtr<internal::WeakBinding<Interface>>> bindings_;
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DISALLOW_COPY_AND_ASSIGN(WeakBindingSet);
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};
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} // namespace mojo
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#endif // MOJO_COMMON_WEAK_BINDING_SET_H_
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