fgl::FGTimer Class Reference

#include <fastgl.h>

Inheritance diagram for fgl::FGTimer:

[legend]Collaboration diagram for fgl::FGTimer:

[legend]List of all members.

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Detailed Description

Some timing class.

Examples:

timer.cpp.

Public Member Functions
	FGTimer (unsigned int val, TimerCall cb)
	FGTimer (TimerCall cb)
Static Public Member Functions
static int	SetTimer (unsigned int val, TimerCall cb)
static unsigned int	GetTicks (void)
static void	Delay (unsigned int)
static int	TimerInit (void)
static void	TimerQuit (void)
Static Protected Member Functions
static void	StartTicks (void)
Protected Attributes
int	state
Friends
void	HandleAlarm (int sig)

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Member Function Documentation

void fgl::FGTimer::Delay (  unsigned int  ms  )  [static]

Wait a specified number of milliseconds before returning

unsigned int fgl::FGTimer::GetTicks (  void   )  [static]

Get the number of milliseconds since the OpenGUI library initialization. Note that this value wraps if the program runs for more than ~49 days.

int fgl::FGTimer::SetTimer (  unsigned int  ms, TimerCall  callback )  [static]

Set a callback to run after the specified number of milliseconds has elapsed. The callback function is passed the current timer interval and returns the next timer interval. If the returned value is the same as the one passed in, the periodic alarm continues, otherwise a new alarm is scheduled. To cancel a currently running timer, call SetTimer(0, NULL); The timer callback function may run in a different thread than your main code, and so shouldn't call any functions from within itself. The maximum resolution of this timer is 10 ms, which means that if you request a 16 ms timer, your callback will run approximately 20 ms later on an unloaded system. If you wanted to set a flag signaling a frame update at 30 frames per second (every 33 ms), you might set a timer for 30 ms: SetTimer((33/10)*10, flag_update); Under UNIX, you should not use raise or use SIGALRM and this function in the same program, as it is implemented using setitimer(). You also should not use this function in multi-threaded applications as signals to multi-threaded apps have undefined behavior in some implementations. Examples: timer.cpp.

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