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Unified Diff: mojo/common/strong_binding_set.h

Issue 1841863002: Update monet. (Closed) Base URL: https://github.com/domokit/monet.git@master
Patch Set: Created 4 years, 9 months ago
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Index: mojo/common/strong_binding_set.h
diff --git a/mojo/common/strong_binding_set.h b/mojo/common/strong_binding_set.h
new file mode 100644
index 0000000000000000000000000000000000000000..99b25ea4d2214fec08cb936447ee8c4a4859d082
--- /dev/null
+++ b/mojo/common/strong_binding_set.h
@@ -0,0 +1,75 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MOJO_COMMON_STRONG_BINDING_SET_H_
+#define MOJO_COMMON_STRONG_BINDING_SET_H_
+
+#include <algorithm>
+#include <memory>
+#include <vector>
+
+#include "base/logging.h"
+#include "base/macros.h"
+#include "mojo/public/cpp/bindings/binding.h"
+
+namespace mojo {
+
+// Use this class to manage a set of strong bindings each of which is
+// owned by the pipe it is bound to. The set takes ownership of the
+// interfaces and will delete them when the bindings are closed.
+template <typename Interface>
+class StrongBindingSet {
+ public:
+ StrongBindingSet() {}
+ ~StrongBindingSet() { CloseAllBindings(); }
+
+ // Adds a binding to the list and arranges for it to be removed when
+ // a connection error occurs. Takes ownership of |impl|, which
+ // will be deleted when the binding is closed.
+ void AddBinding(Interface* impl, InterfaceRequest<Interface> request) {
+ bindings_.emplace_back(new Binding<Interface>(impl, request.Pass()));
+ auto* binding = bindings_.back().get();
+ // Set the connection error handler for the newly added Binding to be a
+ // function that will erase it from the vector.
+ binding->set_connection_error_handler([this, binding]() {
+ auto it =
+ std::find_if(bindings_.begin(), bindings_.end(),
+ [binding](const std::unique_ptr<Binding<Interface>>& b) {
+ return (b.get() == binding);
+ });
+ DCHECK(it != bindings_.end());
+ delete binding->impl();
+ bindings_.erase(it);
+ });
+ }
+
+ // Removes all bindings for the specified interface implementation.
+ // The implementation object is not destroyed.
+ void RemoveBindings(Interface* impl) {
+ bindings_.erase(
+ std::remove_if(bindings_.begin(), bindings_.end(),
+ [impl](const std::unique_ptr<Binding<Interface>>& b) {
+ return (b->impl() == impl);
+ }));
+ }
+
+ // Closes all bindings and deletes their associated interfaces.
+ void CloseAllBindings() {
+ for (auto it = bindings_.begin(); it != bindings_.end(); ++it) {
+ delete (*it)->impl();
+ }
+ bindings_.clear();
+ }
+
+ size_t size() const { return bindings_.size(); }
+
+ private:
+ std::vector<std::unique_ptr<Binding<Interface>>> bindings_;
+
+ DISALLOW_COPY_AND_ASSIGN(StrongBindingSet);
+};
+
+} // namespace mojo
+
+#endif // MOJO_COMMON_STRONG_BINDING_SET_H_
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