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/********************************************************************************/
/* */
/* Papyrus 3 library. */
/* This library constitutes a DICOM file system which helps reading and writing */
/* DICOM files and DICOMDIR files. */
/* */
/* Copyright (C) 2004 - Service of Medical Informatics - */
/* University Hospitals of Geneva (HUG), Geneva, Switzerland */
/* */
/* This library is a free software; you can redistribute it and/or modify it */
/* under the terms of the GNU Lesser General Public License as published by the */
/* Free Software Foundation; either version 2.1 of the License, or */
/* (at your option) any later version. */
/* */
/* This library is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. */
/* See the GNU Lesser General Public License for more details. */
/* */
/* You should have received a copy of the GNU Lesser General Public License */
/* along with this library; if not, write to */
/* the Free Software Foundation, Inc., */
/* 59 Temple Place, Suite 330, */
/* Boston, MA 02111-1307 USA */
/* */
/* You can contact us for more information at osiris@sim.hcuge.ch */
/* or by writing to Papyrus, */
/* Unite d'Imagerie Numerique / Service d'Informatique Medicale / HUG, */
/* 24, Micheli-du-Crest street, 1211 Geneva 14, Switzerland. */
/* */
/* The University Hopitals of Geneva, hereby disclaims all copyright interest */
/* in the library `Papyrus' (a library for reading and writing DICOM files). */
/* */
/* Geneva, april 2004 */
/* Antoine Geissbuhler, head of the Service of Medical Informatics, */
/* University Hospitals of Geneva, Switzerland */
/* */
/********************************************************************************/
/********************************************************************************/
/* */
/* Project : P A P Y R U S Toolkit */
/* File : PapyMemSystem.h */
/* Function : contains calls for asynchronous read */
/* Authors : Olivier Baujard */
/* */
/* History : 03.1997 version 3.1 */
/* 04.2001 version 3.7 */
/* 09.2001 version 3.7 on CVS */
/* */
/********************************************************************************/
#ifndef PapyMemSystem3H
#define PapyMemSystem3H
/* ------------------------- includes ------------------------------------------*/
#include <windows.h>
#include <process.h> /* _beginthread, _endthread */
#include <fcntl.h>
#ifdef __cplusplus
extern "C" {
int __cdecl _close(int);
long __cdecl _lseek(int, long, int);
int __cdecl _open(const char *, int, ...);
int __cdecl _read(int, void *, unsigned int);
int __cdecl _write(int, void *, unsigned int);
char* __cdecl sprintf(char*, char *, ...);
}
#endif
#ifdef __cplusplus /* C++ PapyMemSystem class and functions */
class PapyMemSystem {
public:
PapyMemSystem();
~PapyMemSystem();
int Open(char* aFilename,long aLength,long aChunkSize=10240L);
void Close();
int Read(char* aBuffer,int aLength);
long Seek(int aPosition,long anOffset);
int WaitSomethingToRead();
int WaitPlaceToWrite();
int IsMemoryAllocated();
static void ReadMemory(void* aPapyMemSystem); // function used in thread
private:
char* theBuffer; // Buffer to read from
long theLength; // Length of buffer
long theChunkSize; // Length of an element chunk read in thread
char* theFilename; // Filename to read from
unsigned long theReadingThread; // Handle to thread reading from filename to fill buffer
char* theFirstPosition; // Starting position of buffer
char* theLastPosition; // Last position in buffer
char* theCurrentRead; // Current position of buffer reading cursor
char* theCurrentWrite; // Current position of file reading cursor
HANDLE theReadEvent; // Event to synchronize file reading
HANDLE theReadMutex; // Mutex to synchronize buffer reading
HANDLE theWriteMutex; // Mutex to synchronize file reading
HANDLE theBooleanMutex; // Mutex to synchronize file reading
short theBoolean; // boolean to check if end of buffer has been reach by all threads
};
extern "C" {
int OpenMemSystem(char* aFilename,long aLength,long aChunk);
int ReadMemSystem(char* aBuffer,int aLength);
int SeekMemSystem(int aPosition,long anOffset);
int IsAllocated();
void CloseMemSystem();
}
#endif
#ifndef __cplusplus /* C API to PapyMemSystem class */
void* CreatePapyMemSystem();
int OpenPapyMemSystem(void* aPapyMemSystem,char* aFilename,long aLength,long aChunk);
void ClosePapyMemSystem(void* aPapyMemSystem);
int ReadPapyMemSystem(void* aPapyMemSystem,char* aBuffer,int aLength);
int SeekPapyMemSystem(void* aPapyMemSystem,int aPosition,long anOffset);
int IsMemoryAllocated(void* aPapyMemSystem);
void DeletePapyMemSystem(void* aPapyMemSystem);
int OpenMemSystem(char* aFilename,long aLength,long aChunk);
int ReadMemSystem(char* aBuffer,int aLength);
int SeekMemSystem(int aPosition,long anOffset);
int IsAllocated();
void CloseMemSystem();
#endif
#endif
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