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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_INTERFACE_PTR_SET_H_ | |
| 6 #define MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_PTR_SET_H_ | |
| 7 | |
| 8 #include <assert.h> | |
| 9 | |
| 10 #include <vector> | |
| 11 | |
| 12 #include "mojo/public/cpp/bindings/interface_ptr.h" | |
| 13 | |
| 14 namespace mojo { | |
| 15 | |
| 16 // An InterfacePtrSet contains a collection of InterfacePtrs | |
| 17 // that are automatically removed from the collection and destroyed | |
| 18 // when their associated MessagePipe experiences a connection error. | |
| 19 // When the set is destroyed all of the MessagePipes will be closed. | |
| 20 template <typename Interface> | |
| 21 class InterfacePtrSet { | |
| 22 public: | |
| 23 InterfacePtrSet() {} | |
| 24 ~InterfacePtrSet() { CloseAll(); } | |
| 25 | |
| 26 // |ptr| must be bound to a message pipe. | |
| 27 void AddInterfacePtr(InterfacePtr<Interface> ptr) { | |
| 28 assert(ptr.is_bound()); | |
| 29 ptrs_.emplace_back(ptr.Pass()); | |
| 30 InterfacePtr<Interface>& intrfc_ptr = ptrs_.back(); | |
| 31 Interface* pointer = intrfc_ptr.get(); | |
| 32 // Set the connection error handler for the newly added InterfacePtr to be a | |
| 33 // function that will erase it from the vector. | |
| 34 intrfc_ptr.set_connection_error_handler([pointer, this]() { | |
| 35 // Since InterfacePtr itself is a movable type, the thing that uniquely | |
| 36 // identifies the InterfacePtr we wish to erase is its Interface*. | |
| 37 auto it = std::find_if(ptrs_.begin(), ptrs_.end(), | |
| 38 [pointer](const InterfacePtr<Interface>& p) { | |
| 39 return (p.get() == pointer); | |
| 40 }); | |
| 41 assert(it != ptrs_.end()); | |
| 42 ptrs_.erase(it); | |
| 43 }); | |
| 44 } | |
| 45 | |
| 46 // Applies |function| to each of the InterfacePtrs in the set. | |
| 47 template <typename FunctionType> | |
| 48 void ForAllPtrs(FunctionType function) { | |
| 49 for (const auto& it : ptrs_) { | |
| 50 if (it) | |
| 51 function(it.get()); | |
| 52 } | |
| 53 } | |
| 54 | |
| 55 // Closes the MessagePipe associated with each of the InterfacePtrs in | |
| 56 // this set and clears the set. | |
| 57 void CloseAll() { | |
| 58 for (auto& it : ptrs_) { | |
| 59 if (it) | |
| 60 it.reset(); | |
| 61 } | |
| 62 ptrs_.clear(); | |
| 63 } | |
| 64 | |
| 65 size_t size() const { return ptrs_.size(); } | |
| 66 | |
| 67 private: | |
| 68 std::vector<InterfacePtr<Interface>> ptrs_; | |
| 69 }; | |
| 70 | |
| 71 } // namespace mojo | |
| 72 | |
| 73 #endif // MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_PTR_SET_H_ | |
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