| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef SRC_TRACE_PROCESSOR_IMPORTERS_COMMON_FLOW_TRACKER_H_ |
| #define SRC_TRACE_PROCESSOR_IMPORTERS_COMMON_FLOW_TRACKER_H_ |
| |
| #include <stdint.h> |
| |
| #include "perfetto/ext/base/flat_hash_map.h" |
| #include "src/trace_processor/importers/common/args_tracker.h" |
| #include "src/trace_processor/storage/trace_storage.h" |
| #include "src/trace_processor/types/trace_processor_context.h" |
| |
| namespace perfetto { |
| namespace trace_processor { |
| |
| using FlowId = uint64_t; |
| |
| class FlowTracker { |
| public: |
| explicit FlowTracker(TraceProcessorContext*); |
| ~FlowTracker(); |
| |
| void InsertFlow(SliceId slice_out_id, SliceId slice_in_id); |
| |
| // These methods track flow ids associated with slices and create flows as |
| // needed. |
| // If you don't have flow ids associated with slices, you should use the |
| // InsertFlow method above. |
| void Begin(SliceId slice_id, FlowId flow_id); |
| void Step(SliceId slice_id, FlowId flow_id); |
| void End(SliceId track_id, FlowId flow_id, bool close_flow); |
| |
| // These methods assume you have created a FlowId via GetFlowIdForV1Event and |
| // tie the flow id to the currently open slice on a given track. If you don't |
| // have a v1 event you should use the methods above. |
| void Begin(TrackId track_id, FlowId flow_id); |
| void Step(TrackId track_id, FlowId flow_id); |
| |
| // When |bind_enclosing_slice| is true we will connect the flow to the |
| // currently open slice on the track, when false we will connect the flow to |
| // the next slice to be opened on the track. |
| // When |close_flow| is true it will mark this as the singular end of the |
| // flow, however if there are multiple end points this should be set to |
| // false. Both parameters are only needed for v1 flow events support |
| void End(TrackId track_id, |
| FlowId flow_id, |
| bool bind_enclosing_slice, |
| bool close_flow); |
| |
| bool IsActive(FlowId flow_id) const; |
| |
| FlowId GetFlowIdForV1Event(uint64_t source_id, StringId cat, StringId name); |
| |
| void ClosePendingEventsOnTrack(TrackId track_id, SliceId slice_id); |
| |
| private: |
| struct V1FlowId { |
| uint64_t source_id; |
| StringId cat; |
| StringId name; |
| |
| bool operator==(const V1FlowId& o) const { |
| return o.source_id == source_id && o.cat == cat && o.name == name; |
| } |
| }; |
| |
| struct V1FlowIdHasher { |
| size_t operator()(const V1FlowId& c) const { |
| return std::hash<uint64_t>{}( |
| base::Hasher::Combine(c.source_id, c.cat.raw_id(), c.name.raw_id())); |
| } |
| }; |
| |
| using FlowToSourceSliceMap = base::FlatHashMap<FlowId, SliceId>; |
| using PendingFlowsMap = base::FlatHashMap<TrackId, std::vector<FlowId>>; |
| using V1FlowIdToFlowIdMap = |
| base::FlatHashMap<V1FlowId, FlowId, V1FlowIdHasher>; |
| using FlowIdToV1FlowId = base::FlatHashMap<FlowId, V1FlowId>; |
| |
| void InsertFlow(FlowId flow_id, |
| SliceId outgoing_slice_id, |
| SliceId incoming_slice_id); |
| |
| // List of flow end calls waiting for the next slice |
| PendingFlowsMap pending_flow_ids_map_; |
| |
| // Flows generated by Begin() or Step() |
| FlowToSourceSliceMap flow_to_slice_map_; |
| |
| V1FlowIdToFlowIdMap v1_flow_id_to_flow_id_map_; |
| FlowIdToV1FlowId flow_id_to_v1_flow_id_map_; |
| uint32_t v1_id_counter_ = 0; |
| |
| TraceProcessorContext* const context_; |
| |
| StringId name_key_id_; |
| StringId cat_key_id_; |
| }; |
| |
| } // namespace trace_processor |
| } // namespace perfetto |
| |
| #endif // SRC_TRACE_PROCESSOR_IMPORTERS_COMMON_FLOW_TRACKER_H_ |