94 lines
2.3 KiB
Go
94 lines
2.3 KiB
Go
// Copyright 2019 PingCAP, Inc.
|
|
//
|
|
// 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 bitmap
|
|
|
|
import (
|
|
"sync"
|
|
"sync/atomic"
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/assert"
|
|
)
|
|
|
|
func TestConcurrentBitmapSet(t *testing.T) {
|
|
const loopCount = 1000
|
|
const interval = 2
|
|
|
|
bm := NewConcurrentBitmap(loopCount * interval)
|
|
wg := &sync.WaitGroup{}
|
|
for i := 0; i < loopCount; i++ {
|
|
wg.Add(1)
|
|
go func(bitIndex int) {
|
|
bm.Set(bitIndex)
|
|
wg.Done()
|
|
}(i * interval)
|
|
}
|
|
wg.Wait()
|
|
|
|
for i := 0; i < loopCount; i++ {
|
|
if i%interval == 0 {
|
|
assert.Equal(t, true, bm.UnsafeIsSet(i))
|
|
} else {
|
|
assert.Equal(t, false, bm.UnsafeIsSet(i))
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestConcurrentBitmapUniqueSetter checks if isSetter is unique everytime
|
|
// when a bit is set.
|
|
func TestConcurrentBitmapUniqueSetter(t *testing.T) {
|
|
const loopCount = 10000
|
|
const competitorsPerSet = 50
|
|
|
|
wg := &sync.WaitGroup{}
|
|
bm := NewConcurrentBitmap(32)
|
|
var setterCounter uint64
|
|
var clearCounter uint64
|
|
// Concurrently set bit, and check if isSetter count matches zero clearing count.
|
|
for i := 0; i < loopCount; i++ {
|
|
// Clear bitmap to zero.
|
|
if atomic.CompareAndSwapUint32(&(bm.segments[0]), 0x00000001, 0x00000000) {
|
|
atomic.AddUint64(&clearCounter, 1)
|
|
}
|
|
// Concurrently set.
|
|
for j := 0; j < competitorsPerSet; j++ {
|
|
wg.Add(1)
|
|
go func() {
|
|
if bm.Set(31) {
|
|
atomic.AddUint64(&setterCounter, 1)
|
|
}
|
|
wg.Done()
|
|
}()
|
|
}
|
|
}
|
|
wg.Wait()
|
|
assert.Less(t, clearCounter, uint64(loopCount))
|
|
assert.Equal(t, setterCounter, clearCounter+1)
|
|
}
|
|
|
|
// TestResetConcurrentBitmap test the reset of concurrentBitmap.
|
|
func TestResetConcurrentBitmap(t *testing.T) {
|
|
bm := NewConcurrentBitmap(32)
|
|
bm.Set(1)
|
|
bm.Set(3)
|
|
bm.Set(7)
|
|
bm.Set(16)
|
|
bm.Reset(8)
|
|
assert.Equal(t, bm.bitLen, 8)
|
|
assert.Equal(t, bm.UnsafeIsSet(1), false)
|
|
assert.Equal(t, bm.UnsafeIsSet(3), false)
|
|
assert.Equal(t, bm.UnsafeIsSet(7), false)
|
|
}
|