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

class FIFO. More...

#include <Fifo.h>

Inheritance diagram for DAQpp::FIFO:

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Collaboration diagram for DAQpp::FIFO:

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List of all members.

Public Member Functions
	FIFO (int size)
	constructor
	~FIFO ()
	destructor
int	size () const
	returns the size of the fifo
bool	empty ()
	tells if the fifo is empty
int	read (char *buf, int)
	reads from the fifo
int	write (char *buf, int, bool force=false)
	writes to the fifo If force is false, the data will be lost when there is not enough space in the buffer.
void	reset ()
	resets the fifo
int	space_left ()
	Returns the space left in the FIFO buffer.
int	data_available ()
	Returns the ammount of data not yet read from the FIFO.
Private Attributes
DataCondition	condition
	The data condition.
int	bfsiz
	buffer size
char *	buff
	buffer
char *	rdptr
	read pointer
char *	wrptr
	write pointer
char *	end
	End of the buffer.
Classes
class	DataCondition
	Condition flagging data availavility. More...

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Detailed Description

class FIFO.

This class implements a fifo. It can be used as a data communication channel between different threads, for instance the RunManager::writeData() and a data logger.

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Member Function Documentation

int FIFO::write	(	char *	buf,
		int	count,
		bool	force = false
	)

writes to the fifo If force is false, the data will be lost when there is not enough space in the buffer.

If force is true, the Fifo buffer will be enlarged to ensure that this block of data is not lost

References DAQpp::Mutex::acquire(), bfsiz, buff, condition, end, DAQpp::Condition::notify(), rdptr, DAQpp::Mutex::release(), space_left(), and wrptr.

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

• Fifo.h
• Fifo.cc