1 /*
2  * Copyright (c) 2021 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef ECMASCRIPT_TOOLING_PROTOCOL_HANDLER_H
17 #define ECMASCRIPT_TOOLING_PROTOCOL_HANDLER_H
18 
19 #include <condition_variable>
20 #include <functional>
21 #include <queue>
22 #include <memory>
23 
24 #include "protocol_channel.h"
25 
26 namespace panda::ecmascript::tooling {
27 class ProtocolHandler final : public ProtocolChannel {
28 public:
29     enum DispatchStatus : int32_t {
30         UNKNOWN = 0,
31         DISPATCHING,
32         DISPATCHED
33     };
34 
ProtocolHandler(std::function<void(const void *, const std::string &)> callback, const EcmaVM *vm)35     ProtocolHandler(std::function<void(const void *, const std::string &)> callback, const EcmaVM *vm)
36         : callback_(std::move(callback)), dispatcher_(vm, this), vm_(vm) {}
37     ~ProtocolHandler() override = default;
38 
39     void WaitForDebugger() override;
40     void RunIfWaitingForDebugger() override;
41     void ProcessCommand();
42     void DispatchCommand(std::string &&msg);
43     int32_t GetDispatchStatus();
44 
45     void SendResponse(const DispatchRequest &request, const DispatchResponse &response,
46                       const PtBaseReturns &result) override;
47     void SendNotification(const PtBaseEvents &events) override;
48 
49     std::unique_ptr<PtJson> CreateErrorReply(const DispatchResponse &response);
50     void SendReply(const PtJson &reply);
51 
52 private:
53     NO_MOVE_SEMANTIC(ProtocolHandler);
54     NO_COPY_SEMANTIC(ProtocolHandler);
55 
56     std::function<void(const void *, const std::string &)> callback_;
57     Dispatcher dispatcher_;
58 
59     bool waitingForDebugger_ {false};
60     const EcmaVM *vm_ {nullptr};
61 
62     std::condition_variable requestQueueCond_;
63     std::queue<std::string> requestQueue_;
64     std::mutex requestLock_;
65     std::atomic<bool> isDispatchingMessage_ {false};
66 };
67 }  // namespace panda::ecmascript::tooling
68 
69 #endif
70