package structs

import "sync"

// BufferPool is an interface for all pools of buffers.
type BufferPool[T any] interface {
	Get() T
	Put(T)
}

// SyncPool is a wrapper around [sync.Pool] (it avoids doing type conversion after Get()).
type SyncPool[T any] struct {
	pool *sync.Pool
}

// NewSyncPool creates a new SyncPool.
// The input function f is the function that is used to create new objects if none is available in the pool.
func NewSyncPool[T any](f func() T) *SyncPool[T] {
	pool := &sync.Pool{
		New: func() any {
			return f()
		},
	}
	return &SyncPool[T]{pool: pool}
}

func NewSyncPoolUint64(N int) *SyncPool[*[]uint64] {
	return NewSyncPool(func() *[]uint64 {
		buff := make([]uint64, N)
		return &buff
	})

}

// Get returns a new object of type T from the pool.
func (spool *SyncPool[T]) Get() T {
	return spool.pool.Get().(T)
}

// Put returns the buff to the pool.
func (spool *SyncPool[T]) Put(buff T) {
	spool.pool.Put(buff)
}