87 lines
2.6 KiB
Go
87 lines
2.6 KiB
Go
// Copyright (c) 2015 Uber Technologies, Inc.
|
|
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
// THE SOFTWARE.
|
|
|
|
package tchannel
|
|
|
|
import "sync"
|
|
|
|
// A FramePool is a pool for managing and re-using frames
|
|
type FramePool interface {
|
|
// Retrieves a new frame from the pool
|
|
Get() *Frame
|
|
|
|
// Releases a frame back to the pool
|
|
Release(f *Frame)
|
|
}
|
|
|
|
// DefaultFramePool uses the SyncFramePool.
|
|
var DefaultFramePool = NewSyncFramePool()
|
|
|
|
// DisabledFramePool is a pool that uses the heap and relies on GC.
|
|
var DisabledFramePool = disabledFramePool{}
|
|
|
|
type disabledFramePool struct{}
|
|
|
|
func (p disabledFramePool) Get() *Frame { return NewFrame(MaxFramePayloadSize) }
|
|
func (p disabledFramePool) Release(f *Frame) {}
|
|
|
|
type syncFramePool struct {
|
|
pool *sync.Pool
|
|
}
|
|
|
|
// NewSyncFramePool returns a frame pool that uses a sync.Pool.
|
|
func NewSyncFramePool() FramePool {
|
|
return &syncFramePool{
|
|
pool: &sync.Pool{New: func() interface{} { return NewFrame(MaxFramePayloadSize) }},
|
|
}
|
|
}
|
|
|
|
func (p syncFramePool) Get() *Frame {
|
|
return p.pool.Get().(*Frame)
|
|
}
|
|
|
|
func (p syncFramePool) Release(f *Frame) {
|
|
p.pool.Put(f)
|
|
}
|
|
|
|
type channelFramePool chan *Frame
|
|
|
|
// NewChannelFramePool returns a frame pool backed by a channel that has a max capacity.
|
|
func NewChannelFramePool(capacity int) FramePool {
|
|
return channelFramePool(make(chan *Frame, capacity))
|
|
}
|
|
|
|
func (c channelFramePool) Get() *Frame {
|
|
select {
|
|
case frame := <-c:
|
|
return frame
|
|
default:
|
|
return NewFrame(MaxFramePayloadSize)
|
|
}
|
|
}
|
|
|
|
func (c channelFramePool) Release(f *Frame) {
|
|
select {
|
|
case c <- f:
|
|
default:
|
|
// Too many frames in the channel, discard it.
|
|
}
|
|
}
|