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// Copyright 2018 Google Inc. All Rights Reserved.
//
// 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.
package metrics
import (
"time"
"android/soong/ui/metrics/metrics_proto"
"android/soong/ui/tracer"
"github.com/golang/protobuf/proto"
)
// for testing purpose only
var _now = now
type timeEvent struct {
desc string
name string
// the time that the event started to occur.
start time.Time
}
type TimeTracer interface {
Begin(name, desc string, thread tracer.Thread)
End(thread tracer.Thread) soong_metrics_proto.PerfInfo
}
type timeTracerImpl struct {
activeEvents []timeEvent
}
var _ TimeTracer = &timeTracerImpl{}
func now() time.Time {
return time.Now()
}
func (t *timeTracerImpl) Begin(name, desc string, _ tracer.Thread) {
t.activeEvents = append(t.activeEvents, timeEvent{name: name, desc: desc, start: _now()})
}
func (t *timeTracerImpl) End(tracer.Thread) soong_metrics_proto.PerfInfo {
if len(t.activeEvents) < 1 {
panic("Internal error: No pending events for endAt to end!")
}
lastEvent := t.activeEvents[len(t.activeEvents)-1]
t.activeEvents = t.activeEvents[:len(t.activeEvents)-1]
realTime := uint64(_now().Sub(lastEvent.start).Nanoseconds())
return soong_metrics_proto.PerfInfo{
Desc: proto.String(lastEvent.desc),
Name: proto.String(lastEvent.name),
StartTime: proto.Uint64(uint64(lastEvent.start.UnixNano())),
RealTime: proto.Uint64(realTime),
}
}
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