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stat.go
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stat.go
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/*
Copyright IBM Corp. 2016 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 perfstat
import (
"fmt"
"sync"
"time"
)
type stat struct {
rwLock sync.RWMutex
statName string
desc string
numInvocations int64
total int64
min int64
max int64
}
func newStat(name string, desc string) *stat {
return &stat{statName: name, desc: desc, min: int64(^uint64(0) >> 1)}
}
func (s *stat) String() string {
s.rwLock.RLock()
defer s.rwLock.RUnlock()
return fmt.Sprintf("%s: [total:%d, numInvocation:%d, average:%d, min=%d, max=%d]",
s.statName, s.total, s.numInvocations, (s.total / s.numInvocations), s.min, s.max)
}
func (s *stat) reset() {
s.rwLock.Lock()
defer s.rwLock.Unlock()
s.numInvocations = 0
s.min = int64(^uint64(0) >> 1)
s.max = 0
s.total = 0
}
func (s *stat) updateTimeSpent(startTime time.Time) {
s.updateDataStat(time.Since(startTime).Nanoseconds())
}
func (s *stat) updateDataStat(value int64) {
s.rwLock.Lock()
defer s.rwLock.Unlock()
s.numInvocations++
s.total += value
if value < s.min {
s.min = value
} else if value > s.max {
s.max = value
}
}