70 lines
1.9 KiB
Go
70 lines
1.9 KiB
Go
// Copyright 2018 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package metrics
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import (
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"time"
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"android/soong/ui/metrics/metrics_proto"
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"android/soong/ui/tracer"
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"github.com/golang/protobuf/proto"
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)
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// for testing purpose only
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var _now = now
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type event struct {
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desc string
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name string
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// the time that the event started to occur.
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start time.Time
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}
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type EventTracer interface {
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Begin(name, desc string, thread tracer.Thread)
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End(thread tracer.Thread) soong_metrics_proto.PerfInfo
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}
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type eventTracerImpl struct {
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activeEvents []event
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}
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var _ EventTracer = &eventTracerImpl{}
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func now() time.Time {
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return time.Now()
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}
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func (t *eventTracerImpl) Begin(name, desc string, _ tracer.Thread) {
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t.activeEvents = append(t.activeEvents, event{name: name, desc: desc, start: _now()})
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}
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func (t *eventTracerImpl) End(tracer.Thread) soong_metrics_proto.PerfInfo {
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if len(t.activeEvents) < 1 {
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panic("Internal error: No pending events for endAt to end!")
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}
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lastEvent := t.activeEvents[len(t.activeEvents)-1]
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t.activeEvents = t.activeEvents[:len(t.activeEvents)-1]
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realTime := uint64(_now().Sub(lastEvent.start).Nanoseconds())
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return soong_metrics_proto.PerfInfo{
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Desc: proto.String(lastEvent.desc),
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Name: proto.String(lastEvent.name),
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StartTime: proto.Uint64(uint64(lastEvent.start.UnixNano())),
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RealTime: proto.Uint64(realTime),
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}
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}
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