54 lines
1.7 KiB
Go
54 lines
1.7 KiB
Go
// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package ethapi
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import (
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"sync"
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"github.com/ethereum/go-ethereum/common"
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)
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type AddrLocker struct {
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mu sync.Mutex
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locks map[common.Address]*sync.Mutex
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}
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// lock returns the lock of the given address.
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func (l *AddrLocker) lock(address common.Address) *sync.Mutex {
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l.mu.Lock()
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defer l.mu.Unlock()
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if l.locks == nil {
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l.locks = make(map[common.Address]*sync.Mutex)
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}
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if _, ok := l.locks[address]; !ok {
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l.locks[address] = new(sync.Mutex)
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}
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return l.locks[address]
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}
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// LockAddr locks an account's mutex. This is used to prevent another tx getting the
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// same nonce until the lock is released. The mutex prevents the (an identical nonce) from
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// being read again during the time that the first transaction is being signed.
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func (l *AddrLocker) LockAddr(address common.Address) {
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l.lock(address).Lock()
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}
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// UnlockAddr unlocks the mutex of the given account.
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func (l *AddrLocker) UnlockAddr(address common.Address) {
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l.lock(address).Unlock()
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}
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