DAQpp::IOhandler Class Reference
[DAQ++ IO tools]

class IOhandler

This class is a sort of wrap-around the sigaction call to set a handler on a given signal. More...

#include <IOhandler.h>

Collaboration diagram for DAQpp::IOhandler:

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List of all members.

Public Member Functions
	IOhandler (int s)
	Constructor.
	~IOhandler ()
	Destructor.
void	Register (void(*f)(void *), void *p)
	Registers to a IOhandler.
void	Unregister ()
	Unregister.
void	ResetTrg ()
	resets the interrupt handler
void	PrepareForData ()
	Prepares to catch interrupts.
double	GetNtrg ()
	returns the number of interrupts
bool	Data ()
	returns true if a new interrupt has arrived
void	WaitForData ()
	waits for an interrupt
Static Public Member Functions
static void	gotIO (int)
	actial signal catcher
Private Member Functions
int	lock ()
	lock
bool	trylock ()
	check if it is locked
int	unlock ()
	unlock
Private Attributes
int	signum
	Specifies the signal to catch.
double	nTrg
	number of signal interrupts
bool	newData
	set to true when an interrupt occurs
int	sem
	semaphore
struct sigaction	actIO
	internal sigaction structure
void(*	func )(void *)
	callback function
void *	ptr
	pointer
Static Private Attributes
static IOhandler *	instance = 0
	instance

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Detailed Description

class IOhandler

This class is a sort of wrap-around the sigaction call to set a handler on a given signal.

One example of use is to register to the SIGIO signal to detect when there is data available

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The documentation for this class was generated from the following files:

• IOhandler.h
• IOhandler.cc