Pool implementation using buffered channel

sync_pool.go

// Pool holds Clients.
type Pool struct {
    pool   chan *Client
}

// NewPool creates a new pool of Clients.
func NewPool(max int) *Pool {
    return &Pool{
        pool:   make(chan *Client, max),
    }
}    

// Borrow a Client from the pool.
func (p *Pool) Borrow() *Client {
    var c *Client
    select {
    case c = <-p.pool:
    default:
        c = newClient()
    }
    return c
}

// Return returns a Client to the pool.
func (p *Pool) Return(c *Client) {
    select {
    case p.pool <- c:
    default:
        // let it go, let it go...
    }
}