github.com/amazechain/amc@v0.1.3/common/crypto/cryptopool/pool.go (about)

     1  // Copyright 2023 The AmazeChain Authors
     2  // This file is part of the AmazeChain library.
     3  //
     4  // The AmazeChain library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The AmazeChain library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the AmazeChain library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package cryptopool
    18  
    19  import (
    20  	"hash"
    21  	"sync"
    22  
    23  	"golang.org/x/crypto/sha3"
    24  )
    25  
    26  // hasherPool holds LegacyKeccak hashers.
    27  var hasherPool = sync.Pool{
    28  	New: func() interface{} {
    29  		return sha3.NewLegacyKeccak256()
    30  	},
    31  }
    32  
    33  func NewLegacyKeccak256() hash.Hash {
    34  	h := hasherPool.Get().(hash.Hash)
    35  	h.Reset()
    36  	return h
    37  }
    38  func ReturnToPoolKeccak256(h hash.Hash) { hasherPool.Put(h) }