标签 ‘ wakeup protocol

JAVA互斥锁(synchronized&Lock):行为分析及源码

JVM中有这样一段注释:

// The base-class, PlatformEvent, is platform-specific while the ParkEvent is
// platform-independent.  PlatformEvent provides park(), unpark(), etc., and
// is abstract -- that is, a PlatformEvent should never be instantiated except
// as part of a ParkEvent.
// Equivalently we could have defined a platform-independent base-class that
// exported Allocate(), Release(), etc.  The platform-specific class would extend
// that base-class, adding park(), unpark(), etc.
//
// A word of caution: The JVM uses 2 very similar constructs:
// 1. ParkEvent are used for Java-level "monitor" synchronization.
// 2. Parkers are used by JSR166-JUC park-unpark.
//
// We'll want to eventually merge these redundant facilities and use ParkEvent.

阅读全文

return top