github.com/linapex/ethereum-dpos-chinese@v0.0.0-20190316121959-b78b3a4a1ece/internal/ethapi/addrlock.go (about)

     1  
     2  //<developer>
     3  //    <name>linapex 曹一峰</name>
     4  //    <email>linapex@163.com</email>
     5  //    <wx>superexc</wx>
     6  //    <qqgroup>128148617</qqgroup>
     7  //    <url>https://jsq.ink</url>
     8  //    <role>pku engineer</role>
     9  //    <date>2019-03-16 12:09:40</date>
    10  //</624342641064022016>
    11  
    12  
    13  package ethapi
    14  
    15  import (
    16  	"sync"
    17  
    18  	"github.com/ethereum/go-ethereum/common"
    19  )
    20  
    21  type AddrLocker struct {
    22  	mu    sync.Mutex
    23  	locks map[common.Address]*sync.Mutex
    24  }
    25  
    26  //lock返回给定地址的锁。
    27  func (l *AddrLocker) lock(address common.Address) *sync.Mutex {
    28  	l.mu.Lock()
    29  	defer l.mu.Unlock()
    30  	if l.locks == nil {
    31  		l.locks = make(map[common.Address]*sync.Mutex)
    32  	}
    33  	if _, ok := l.locks[address]; !ok {
    34  		l.locks[address] = new(sync.Mutex)
    35  	}
    36  	return l.locks[address]
    37  }
    38  
    39  //lockaddr锁定帐户的mutex。这用于阻止另一个Tx获取
    40  //直到释放锁。互斥体阻止（相同的nonce）
    41  //在签署第一个事务期间被再次读取。
    42  func (l *AddrLocker) LockAddr(address common.Address) {
    43  	l.lock(address).Lock()
    44  }
    45  
    46  //unlockaddr解锁给定帐户的互斥体。
    47  func (l *AddrLocker) UnlockAddr(address common.Address) {
    48  	l.lock(address).Unlock()
    49  }
    50