feat: implement generic pool

ants.go

@@ -84,6 +84,9 @@ var (
 	// ErrInvalidLoadBalancingStrategy will be returned when trying to create a MultiPool with an invalid load-balancing strategy.
 	ErrInvalidLoadBalancingStrategy = errors.New("invalid load-balancing strategy")
 
+	// ErrInvalidMultiPoolSize  will be returned when trying to create a MultiPool with an invalid size.
+	ErrInvalidMultiPoolSize = errors.New("invalid size for multiple pool")
+
 	// workerChanCap determines whether the channel of a worker should be a buffered channel
 	// to get the best performance. Inspired by fasthttp at
 	// https://github.com/valyala/fasthttp/blob/master/workerpool.go#L139
@@ -387,6 +390,7 @@ func (p *poolCommon) Release() {
 	p.lock.Lock()
 	p.workers.reset()
 	p.lock.Unlock()
+
 	// There might be some callers waiting in retrieveWorker(), so we need to wake them up to prevent
 	// those callers blocking infinitely.
 	p.cond.Broadcast()

ants_benchmark_test.go

@@ -48,6 +48,10 @@ func demoPoolFunc(args any) {
 	time.Sleep(time.Duration(n) * time.Millisecond)
 }
 
+func demoPoolFuncInt(n int) {
+	time.Sleep(time.Duration(n) * time.Millisecond)
+}
+
 var stopLongRunningFunc int32
 
 func longRunningFunc() {
@@ -56,16 +60,12 @@ func longRunningFunc() {
 	}
 }
 
-var stopLongRunningPoolFunc int32
-
 func longRunningPoolFunc(arg any) {
-	if ch, ok := arg.(chan struct{}); ok {
-		<-ch
-		return
-	}
-	for atomic.LoadInt32(&stopLongRunningPoolFunc) == 0 {
-		runtime.Gosched()
-	}
+	<-arg.(chan struct{})
+}
+
+func longRunningPoolFuncCh(ch chan struct{}) {
+	<-ch
 }
 
 func BenchmarkGoroutines(b *testing.B) {