46 lines
976 B
Go
46 lines
976 B
Go
|
package bpool
|
||
|
|
|
||
|
|
// BytePool implements a leaky pool of []byte in the form of a bounded
|
||
|
|
// channel.
|
||
|
|
type BytePool struct {
|
||
|
|
c chan []byte
|
||
|
|
w int
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewBytePool creates a new BytePool bounded to the given maxSize, with new
|
||
|
|
// byte arrays sized based on width.
|
||
|
|
func NewBytePool(maxSize int, width int) (bp *BytePool) {
|
||
|
|
return &BytePool{
|
||
|
|
c: make(chan []byte, maxSize),
|
||
|
|
w: width,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Get gets a []byte from the BytePool, or creates a new one if none are
|
||
|
|
// available in the pool.
|
||
|
|
func (bp *BytePool) Get() (b []byte) {
|
||
|
|
select {
|
||
|
|
case b = <-bp.c:
|
||
|
|
// reuse existing buffer
|
||
|
|
default:
|
||
|
|
// create new buffer
|
||
|
|
b = make([]byte, bp.w)
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// Put returns the given Buffer to the BytePool.
|
||
|
|
func (bp *BytePool) Put(b []byte) {
|
||
|
|
select {
|
||
|
|
case bp.c <- b:
|
||
|
|
// buffer went back into pool
|
||
|
|
default:
|
||
|
|
// buffer didn't go back into pool, just discard
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Width returns the width of the byte arrays in this pool.
|
||
|
|
func (bp *BytePool) Width() (n int) {
|
||
|
|
return bp.w
|
||
|
|
}
|