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// Copyright (C) 2019-2021 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package txnsync
import (
"sync"
"github.com/algorand/go-algorand/data/transactions"
)
const messageBufferDefaultInitialSize = 10240
// msgBuffersPool holds temporary byte slice buffers used for encoding messages.
var msgBuffersPool = sync.Pool{
New: func() interface{} {
return make([]byte, 0, messageBufferDefaultInitialSize)
},
}
// GetEncodingBuf returns a byte slice that can be used for encoding a
// temporary message. The byte slice has zero length but potentially
// non-zero capacity. The caller gets full ownership of the byte slice,
// but is encouraged to return it using releaseMessageBuffer().
func getMessageBuffer() []byte {
return msgBuffersPool.Get().([]byte)[:0]
}
// releaseMessageBuffer places a byte slice into the pool of temporary buffers
// for encoding. The caller gives up ownership of the byte slice when
// passing it to releaseMessageBuffer().
func releaseMessageBuffer(s []byte) {
msgBuffersPool.Put(s) //nolint:staticcheck
}
// txidSlicePool holds temporary byte slice buffers used for encoding messages.
var txidSlicePool = sync.Pool{}
// getTxIDSliceBuffer returns a slice that can be used for storing a
// list of transaction IDs. The slice has zero length but potentially
// non-zero capacity. The caller gets full ownership of the slice,
// but is encouraged to return it using releaseTxIDSliceBuffer().
func getTxIDSliceBuffer(minSize int) []transactions.Txid {
alloc := txidSlicePool.Get()
if alloc == nil {
return make([]transactions.Txid, 0, minSize)
}
buf := alloc.([]transactions.Txid)[:0]
if cap(buf) >= minSize {
return buf
}
txidSlicePool.Put(alloc)
return make([]transactions.Txid, 0, minSize)
}
// releaseTxIDSliceBuffer places a slice into the pool of buffers
// for storage. The caller gives up ownership of the byte slice when
// passing it to releaseMessageBuffer().
func releaseTxIDSliceBuffer(s []transactions.Txid) {
if cap(s) > 0 {
txidSlicePool.Put(s) //nolint:staticcheck
}
}
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