A very simple watchdog operating in virtual time. More...

#include "watchdog.h"

Collaboration diagram for ns3::Watchdog:

Public Member Functions
	Watchdog ()
	Constructor. More...

	~Watchdog ()
	Destructor. More...

void	Ping (Time delay)
	Delay the timer. More...

template<typename FN >
void	SetFunction (FN fn)
	Set the function to execute when the timer expires. More...

template<typename MEM_PTR , typename OBJ_PTR >
void	SetFunction (MEM_PTR memPtr, OBJ_PTR objPtr)
	Set the function to execute when the timer expires. More...


template<typename T1 >
void	SetArguments (T1 a1)
	Set the arguments to be used when invoking the expire function. More...

template<typename T1 , typename T2 >
void	SetArguments (T1 a1, T2 a2)

template<typename T1 , typename T2 , typename T3 >
void	SetArguments (T1 a1, T2 a2, T3 a3)

template<typename T1 , typename T2 , typename T3 , typename T4 >
void	SetArguments (T1 a1, T2 a2, T3 a3, T4 a4)

template<typename T1 , typename T2 , typename T3 , typename T4 , typename T5 >
void	SetArguments (T1 a1, T2 a2, T3 a3, T4 a4, T5 a5)

template<typename T1 , typename T2 , typename T3 , typename T4 , typename T5 , typename T6 >
void	SetArguments (T1 a1, T2 a2, T3 a3, T4 a4, T5 a5, T6 a6)

Private Member Functions
void	Expire (void)
	Internal callback invoked when the timer expires. More...

Private Attributes
Time	m_end
	The absolute time when the timer will expire. More...

EventId	m_event
	The future event scheduled to expire the timer. More...

TimerImpl *	m_impl
	The timer implementation, which contains the bound callback function and arguments. More...

Detailed Description

A very simple watchdog operating in virtual time.

The watchdog timer is started by calling Ping with a delay value. Once started the timer cannot be suspended, cancelled or shortened. It can be lengthened (delayed) by calling Ping again: if the new expire time (current simulation time plus the new delay) is greater than the old expire time the timer will be extended to the new expire time.

Typical usage would be to periodically Ping the Watchdog, extending it's execution time. If the owning process fails to Ping before the Watchdog expires, the registered function will be invoked.

If you don't ping the watchdog sufficiently often, it triggers its listening function.

See also: Timer for a more sophisticated general purpose Virtual Time Timer and Watchdog.

Definition at line 56 of file watchdog.h.

Constructor & Destructor Documentation

ns3::Watchdog::Watchdog ( )

Constructor.

Definition at line 34 of file watchdog.cc.

References NS_LOG_FUNCTION_NOARGS.

ns3::Watchdog::~Watchdog ( )

Destructor.

Definition at line 42 of file watchdog.cc.

References m_impl, and NS_LOG_FUNCTION.

Member Function Documentation

void ns3::Watchdog::Expire ( void )

private

Internal callback invoked when the timer expires.

Definition at line 62 of file watchdog.cc.

References ns3::TimerImpl::Invoke(), m_end, m_event, m_impl, ns3::Now(), ns3::Simulator::Now(), NS_LOG_FUNCTION, and ns3::Simulator::Schedule().

Referenced by Ping().

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void ns3::Watchdog::Ping ( Time delay )

Delay the timer.

Parameters

[in] delay The watchdog delay

After a call to this method, the watchdog will not be triggered until the delay specified has been expired. This operation is sometimes named "re-arming" a watchdog in some operating systems.

Definition at line 49 of file watchdog.cc.

References Expire(), ns3::EventId::IsRunning(), m_end, m_event, max, ns3::Now(), ns3::Simulator::Now(), NS_LOG_FUNCTION, and ns3::Simulator::Schedule().

Referenced by ns3::tests::WatchdogTestCase::DoRun().

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template<typename T1 >

void ns3::Watchdog::SetArguments ( T1 a1 )

Set the arguments to be used when invoking the expire function.

Template Parameters

T1	[deduced] Type of the first argument.

Parameters

[in] a1 The first argument

Definition at line 214 of file watchdog.h.

References m_impl, NS_FATAL_ERROR, and ns3::TimerImpl::SetArgs().

Referenced by ns3::tests::WatchdogTestCase::DoRun().

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template<typename T1 , typename T2 >

void ns3::Watchdog::SetArguments	(	T1	a1,
		T2	a2
	)

Template Parameters

T1	[deduced] Type of the first argument.
T2	[deduced] Type of the second argument.

Parameters

[in]	a1	the first argument
[in]	a2	the second argument

Definition at line 225 of file watchdog.h.

References m_impl, NS_FATAL_ERROR, and ns3::TimerImpl::SetArgs().

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template<typename T1 , typename T2 , typename T3 >

void ns3::Watchdog::SetArguments	(	T1	a1,
		T2	a2,
		T3	a3
	)

Template Parameters

T1	[deduced] Type of the first argument.
T2	[deduced] Type of the second argument.
T3	[deduced] Type of the third argument.

Parameters

[in]	a1	the first argument
[in]	a2	the second argument
[in]	a3	the third argument

Definition at line 237 of file watchdog.h.

References m_impl, NS_FATAL_ERROR, and ns3::TimerImpl::SetArgs().

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template<typename T1 , typename T2 , typename T3 , typename T4 >

void ns3::Watchdog::SetArguments	(	T1	a1,
		T2	a2,
		T3	a3,
		T4	a4
	)

Template Parameters

T1	[deduced] Type of the first argument.
T2	[deduced] Type of the second argument.
T3	[deduced] Type of the third argument.
T4	[deduced] Type of the fourth argument.

Parameters

[in]	a1	the first argument
[in]	a2	the second argument
[in]	a3	the third argument
[in]	a4	the fourth argument

Definition at line 249 of file watchdog.h.

References m_impl, NS_FATAL_ERROR, and ns3::TimerImpl::SetArgs().

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template<typename T1 , typename T2 , typename T3 , typename T4 , typename T5 >

void ns3::Watchdog::SetArguments	(	T1	a1,
		T2	a2,
		T3	a3,
		T4	a4,
		T5	a5
	)

Template Parameters

T1	[deduced] Type of the first argument.
T2	[deduced] Type of the second argument.
T3	[deduced] Type of the third argument.
T4	[deduced] Type of the fourth argument.
T5	[deduced] Type of the fifth argument.

Parameters

[in]	a1	the first argument
[in]	a2	the second argument
[in]	a3	the third argument
[in]	a4	the fourth argument
[in]	a5	the fifth argument

Definition at line 261 of file watchdog.h.

References m_impl, NS_FATAL_ERROR, and ns3::TimerImpl::SetArgs().

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template<typename T1 , typename T2 , typename T3 , typename T4 , typename T5 , typename T6 >

void ns3::Watchdog::SetArguments	(	T1	a1,
		T2	a2,
		T3	a3,
		T4	a4,
		T5	a5,
		T6	a6
	)

Template Parameters

T1	[deduced] Type of the first argument.
T2	[deduced] Type of the second argument.
T3	[deduced] Type of the third argument.
T4	[deduced] Type of the fourth argument.
T5	[deduced] Type of the fifth argument.
T6	[deduced] Type of the sixth argument.