esve::kernel::Sync_Update_Server Class Reference

Provide synchronous updates across wake/sleep cycles. More...

#include <esve/kernel/Sync_Update_Server.hxx>

Inheritance diagram for esve::kernel::Sync_Update_Server:

List of all members.

Public Member Functions
void	reset ()
	Reset the dt interval to zero. Useful after waking up.
void	remove_all ()
	Child update() receivers.
virtual void	add (Update_Receiver &)=0
	Child update() receivers.
virtual void	remove (Update_Receiver &)=0
	Child update() receivers.
Protected Member Functions
bool	handle_check_awake (bool currently_awake)
	Do you want to be awake?
bool	handle_wake ()
	The command to wake up.
bool	handle_sleep ()
	The command to sleep.
void	tick ()
	Receive the tick() message.
bool	awake () const
	Are we awake?
void	send_update ()
	Send the update() message to all children.
void	send_update (double dt)
	Send the update() message to all children.

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Detailed Description

Provide synchronous updates across wake/sleep cycles.

A Sync_Update_Server is both a Wake_State_Handler and a Sync_Update_Sender.

When a Sync_Update_Server receives handle_wake(), it calls Sync_Update_Sender::reset() on itself. In this manner a consistent time-delta is provided to children.

A Sync_Update_Server will not send synchronized update()s unless it is awake().

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Member Function Documentation

bool esve::kernel::Sync_Update_Server::handle_check_awake (  bool  currently_awake  )  [protected, virtual]

Do you want to be awake? If currently awake, a return value of true indicates a desire to stay awake. If not currently awake, a return value of true indicates a desire to wake up. Implements esve::kernel::Wake_State_Handler.

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