1 /*
2  * Copyright (C) 2019 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef SRC_PERFETTO_CMD_TRIGGER_PRODUCER_H_
18 #define SRC_PERFETTO_CMD_TRIGGER_PRODUCER_H_
19 
20 #include <string>
21 #include <vector>
22 
23 #include "perfetto/base/task_runner.h"
24 #include "perfetto/ext/base/weak_ptr.h"
25 #include "perfetto/ext/tracing/core/producer.h"
26 #include "perfetto/ext/tracing/core/tracing_service.h"
27 #include "perfetto/tracing/core/forward_decls.h"
28 namespace perfetto {
29 
30 // This is a producer that only sends the provided |triggers| to the service. It
31 // will never register any data sources.
32 class TriggerProducer : public Producer {
33  public:
34   TriggerProducer(base::TaskRunner* task_runner,
35                   std::function<void(bool)> callback,
36                   const std::vector<std::string>* const triggers);
37   ~TriggerProducer() override;
38 
39   // We will call Trigger() on the |producer_endpoint_| and then
40   // immediately call |callback_|.
41   void OnConnect() override;
42   // We have no clean up to do OnDisconnect.
43   void OnDisconnect() override;
44 
45   // Unimplemented methods are below this.
46   void OnTracingSetup() override;
47   void SetupDataSource(DataSourceInstanceID, const DataSourceConfig&) override;
48   void StartDataSource(DataSourceInstanceID, const DataSourceConfig&) override;
49   void StopDataSource(DataSourceInstanceID) override;
50   void Flush(FlushRequestID, const DataSourceInstanceID*, size_t) override;
51   void ClearIncrementalState(const DataSourceInstanceID* data_source_ids,
52                              size_t num_data_sources) override;
53 
54  private:
55   bool issued_callback_ = false;
56   base::TaskRunner* const task_runner_;
57   const std::function<void(bool)> callback_;
58   const std::vector<std::string>* const triggers_;
59   std::unique_ptr<TracingService::ProducerEndpoint> producer_endpoint_;
60   base::WeakPtrFactory<TriggerProducer> weak_factory_;
61 };
62 
63 }  // namespace perfetto
64 
65 #endif  // SRC_PERFETTO_CMD_TRIGGER_PRODUCER_H_
66