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spinlock_test.go
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spinlock_test.go
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/*
* Copyright 2021 chenquan
*
* 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 xsync
import (
"github.com/stretchr/testify/assert"
"runtime"
"sync"
"sync/atomic"
"testing"
"time"
)
func TestTryLock(t *testing.T) {
var lock Spinlock
assert.True(t, lock.TryLock())
assert.False(t, lock.TryLock())
lock.Unlock()
assert.True(t, lock.TryLock())
}
func TestSpinLock(t *testing.T) {
var lock Spinlock
lock.Lock()
assert.False(t, lock.TryLock())
lock.Unlock()
assert.True(t, lock.TryLock())
}
func TestSpinLockRace(t *testing.T) {
var lock Spinlock
lock.Lock()
var wait sync.WaitGroup
wait.Add(1)
go func() {
wait.Done()
}()
time.Sleep(time.Millisecond * 100)
lock.Unlock()
wait.Wait()
assert.True(t, lock.TryLock())
}
func TestSpinLock_TryLock(t *testing.T) {
var lock Spinlock
var count int32
var wait sync.WaitGroup
wait.Add(2)
sig := make(chan struct{})
go func() {
lock.TryLock()
sig <- struct{}{}
atomic.AddInt32(&count, 1)
runtime.Gosched()
lock.Unlock()
wait.Done()
}()
go func() {
<-sig
lock.Lock()
atomic.AddInt32(&count, 1)
lock.Unlock()
wait.Done()
}()
wait.Wait()
assert.Equal(t, int32(2), atomic.LoadInt32(&count))
}