example_object_pool.go

package main

import (
	"fmt"
	"sync"
	"sync/atomic"
)

type ObjectPool[T any] struct {
	pool  sync.Pool
	stats struct {
		create   *int64
		allocate int64
		access   int64
	}
}

func (o *ObjectPool[T]) Get() T {
	atomic.AddInt64(&o.stats.allocate, 1)
	atomic.AddInt64(&o.stats.access, 1)
	t, _ := o.pool.Get().(T)
	return t
}

func (o *ObjectPool[T]) Put(x T) {
	o.pool.Put(x)
	atomic.AddInt64(&o.stats.allocate, -1)
}

func (o *ObjectPool[T]) Stats() {
	fmt.Printf("create:%d, allocate:%d, access:%d\n", *o.stats.create, o.stats.allocate, o.stats.access)
	fmt.Printf("%+v", o.pool)
}

func NewObjectPool() *ObjectPool[*Deneme] {
	var create int64

	return &ObjectPool[*Deneme]{
		pool: sync.Pool{
			New: func() any {
				atomic.AddInt64(&create, 1)
				deneme := Deneme{}
				deneme.Reset()
				return &deneme
			},
		},
		stats: struct {
			create   *int64
			allocate int64
			access   int64
		}{
			create: &create,
		},
	}
}