Virtual Time Timer and Watchdog

Collaboration diagram for Virtual Time Timer and Watchdog:

Topics
	TimerImpl Implementation

Files
file	timer-impl.h
	ns3::TimerImpl declaration and implementation.
file	timer.cc
	ns3::Timer implementation.
file	timer.h
	ns3::Timer class declaration.
file	trickle-timer-test-suite.cc
	Trickle Timer test suite.
file	trickle-timer.h
	ns3::TrickleTimer timer class declaration.
file	watchdog-test-suite.cc
	Watchdog test suite.
file	watchdog.cc
	ns3::Watchdog timer class implementation.
file	watchdog.h
	ns3::Watchdog timer class declaration.

Classes
class	ns3::Timer
	A simple virtual Timer class. More...
class	ns3::internal::TimerImpl
	The timer implementation underlying Timer and Watchdog. More...
class	ns3::TrickleTimer
	A Trickle Timer following RFC 6206 . More...
class	ns3::Watchdog
	A very simple watchdog operating in virtual time. More...

Detailed Description

The Timer and Watchdog objects both facilitate scheduling functions to execute a specified virtual time in the future.

A Watchdog timer cannot be paused or cancelled once it has been started, however it can be lengthened (delayed). A Watchdog takes no action when it is destroyed.

A Timer can be suspended, resumed, cancelled and queried for time left, but it can't be extended (except by suspending and resuming). In addition, it can be configured to take different actions when the Timer is destroyed.