pool.go

package pool

type Task interface {
	Execute(id int)
}

type Pool struct {
	tasks chan Task
	kill  chan bool
}

func NewPool(size, queue int) *Pool {
	pool := &Pool{
		tasks: make(chan Task, queue),
		kill:  make(chan bool),
	}

	for i := 0; i < size; i++ {
		go pool.worker(i)
	}

	return pool
}

func (p *Pool) worker(id int) {
	for {
		select {
		case task, ok := <-p.tasks:
			if !ok {
				return
			}
			task.Execute(id)
		case <-p.kill:
			// should really kill it
			return
		}
	}
}


func (p *Pool) Close() {
	close(p.tasks)
}

func (p *Pool) Exec(task Task) {
	p.tasks <- task
}