Main Page   Namespace List   Compound List   File List   Namespace Members   Compound Members   File Members  

iocount.h File Reference

#include <stdint.h>
#include <stdio.h>

Go to the source code of this file.

Namespaces

namespace  ioc

Typedefs

typedef uint16_t count_t

Variables

const count_t max_count_t = (count_t)(-1)


Detailed Description

MASS project: header file for iocount.cpp

This module implements the Input/Output operations with disk for saving and restoring the counts in count buffers of channels. The aim is to allow for the saving the night-time count series in a binary file and for the off-line playback the recorded series of input channel counts to repeat their processing and displaying the output parameters.

The counts from all channels of the device are written in binary format by the utility ioc::write() which returns the start-position address of the written series. This address is saved somewhere else (e.g. in main MASS output file). Then, upon reading that file, the address is fed to ioc::read() which restores the counts from the file in the channel buffers. After this, the processing may go on as if the count data were just received from counters.

The binary count file should be opened with an attribute "a+b" and closed upon completion of reading/writing externally. On error (bad input address for ioc::read() or low-level I/O problem), the error is set by utilities to be detected by nr::erget() and nr::ermessage().

The buffers are made of the type count_t which should be specified externally. All the bytes of count numbers are written to the disk. Thus, the two-byte unsigned or signed integers are seemed to be best suited for MASS, for which we do in this module:

                #include <stdint.h> // or <sys/types.h>
                ...
                typedef count_t uint16_t ;      // or int16_t
        

Author:
N.Shatsky (kolja@sai.msu.ru)
Version:
1.0

Typedef Documentation

typedef uint16_t count_t
 

The count type will be unsigned 16-bit integer type


Variable Documentation

const count_t max_count_t = (count_t)(-1)
 

Maximal count_t (implementation works for unsigned integral types)


Generated on Wed Jan 16 00:40:06 2002 for MASS Software by doxygen1.2.11.1 written by Dimitri van Heesch, © 1997-2001