What is a monitor ?

[Razvan]

A simpler practical definition:


"Any object that has synchronized code."


Regards,
Razvan

 

[Thomas G. Marshall]

Razvan coughed up:

A simpler practical definition:


"Any object that has synchronized code."


Regards,
Razvan

No.

A "monitor" is conceptually more /owned/ or /held/ by an object, it is not
the object itself.

Take for evidence the following java documentation for (Object).notify in
the java source file mumble/java/lang/Object.java.

public final void notify()

Wakes up a single thread that is waiting on
this object's monitor. [...]

This terminology is used throughout.

 

[Mike Schilling]

A simpler practical definition:


"Any object that has synchronized code."

It's a lock used to ensure that the execution of a section of code is
restricted to one thread at a time. (A section of code protected by a
monitor is called a "critical section.") In Java, each object owns a
monitor, but the object is not itself a monitor.