标签:初始化 Lazy used Kotlin value instance 线程
一、by Lazy 延迟初始化是线程安全吗?
Lazy是线程安全的,系统默认给Lazy属性添加了同步锁。也就是LazyThreadSafetyMode.SYNCHRONIZED,使之在同一时刻只能有一个线程对Lazy属性初始化操作。
/** * Specifies how a [Lazy] instance synchronizes initialization among multiple threads. */ public enum class LazyThreadSafetyMode { /** * Locks are used to ensure that only a single thread can initialize the [Lazy] instance. */ SYNCHRONIZED, /** * Initializer function can be called several times on concurrent access to uninitialized [Lazy] instance value, * but only the first returned value will be used as the value of [Lazy] instance. */ PUBLICATION, /** * No locks are used to synchronize an access to the [Lazy] instance value; if the instance is accessed from multiple threads, its behavior is undefined. * * This mode should not be used unless the [Lazy] instance is guaranteed never to be initialized from more than one thread. */ NONE, }
标签:初始化,Lazy,used,Kotlin,value,instance,线程 来源: https://www.cnblogs.com/naray/p/13542118.html
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。