• Post Reply Bookmark Topic Watch Topic
  • New Topic

Monitor

 
V Srinivasan
Ranch Hand
Posts: 99
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Which is being considered as Monitor while discussing Thread subject. I am not getting a clear definition about it.
Thanks
 
Jim Baiter
Ranch Hand
Posts: 532
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Think of a monitor like a lock. Every object has a monitor.
A thread can lock this monitor for an object and while the thread is in a critical section (synchronized block), other threads cannot acquire this lock.
 
madhusr
Greenhorn
Posts: 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
monitor is something like a block for an object of thread which does not allow other threads to enter when synchronised
------------------
 
V Srinivasan
Ranch Hand
Posts: 99
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
How come? Monitor is also an object.
 
Jim Baiter
Ranch Hand
Posts: 532
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
You can get the official definition by looking at the Java Language Specification, Chapter 17.
 
kiran babu
Greenhorn
Posts: 5
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
hello friend,
java uses MONITORS to perform Sysncronization. Every object with Synchronized method is a monitor and the monitor lets only one thread at a time execute a synchronized method on the object.
 
sandeep bagati
Ranch Hand
Posts: 62
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Monitor is infact an Object that can block and allow a thread(s) to run.
For this purpose Monitor provides every Object a lock and this lock is controlled by atmost one Thread at a particular time.
And also putting synchronized keyword before a method decleration or a block just makes the lock of the object containing that code to be acquired by a single thread till that method(or synchronized block) is implemented by the thread that has got the lock.The thread gives up the lock after that.
 
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!