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//C- -*- C++ -*-
//C- -------------------------------------------------------------------
//C- DjVuLibre-3.5
//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun.
//C- Copyright (c) 2001 AT&T
//C-
//C- This software is subject to, and may be distributed under, the
//C- GNU General Public License, Version 2. The license should have
//C- accompanied the software or you may obtain a copy of the license
//C- from the Free Software Foundation at http://www.fsf.org .
//C-
//C- This program is distributed in the hope that it will be useful,
//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//C- GNU General Public License for more details.
//C-
//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech
//C- Software authorized us to replace the original DjVu(r) Reference
//C- Library notice by the following text (see doc/lizard2002.djvu):
//C-
//C- ------------------------------------------------------------------
//C- | DjVu (r) Reference Library (v. 3.5)
//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
//C- | The DjVu Reference Library is protected by U.S. Pat. No.
//C- | 6,058,214 and patents pending.
//C- |
//C- | This software is subject to, and may be distributed under, the
//C- | GNU General Public License, Version 2. The license should have
//C- | accompanied the software or you may obtain a copy of the license
//C- | from the Free Software Foundation at http://www.fsf.org .
//C- |
//C- | The computer code originally released by LizardTech under this
//C- | license and unmodified by other parties is deemed "the LIZARDTECH
//C- | ORIGINAL CODE." Subject to any third party intellectual property
//C- | claims, LizardTech grants recipient a worldwide, royalty-free,
//C- | non-exclusive license to make, use, sell, or otherwise dispose of
//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the
//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU
//C- | General Public License. This grant only confers the right to
//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to
//C- | the extent such infringement is reasonably necessary to enable
//C- | recipient to make, have made, practice, sell, or otherwise dispose
//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to
//C- | any greater extent that may be necessary to utilize further
//C- | modifications or combinations.
//C- |
//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
//C- +------------------------------------------------------------------
//
// $Id: DjVuGlobal.cpp,v 1.7 2003/11/07 22:08:20 leonb Exp $
// $Name: release_3_5_15 $
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#if NEED_GNUG_PRAGMAS
# pragma implementation
#endif
/** This file impliments the DjVuProgressTask elements. The memory
functions are implimented in a separate file, because only the memory
functions should be compiled with out overloading of the memory functions.
*/
#ifdef NEED_DJVU_PROGRESS
#include "DjVuGlobal.h"
// ----------------------------------------
#include "GOS.h"
#include "GThreads.h"
#include "GException.h"
#include "GContainer.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define INITIAL 500
#define INTERVAL 250
class DjVuProgressTask::Data : public GPEnabled
{
public:
djvu_progress_callback *callback;
DjVuProgressTask *head;
const char *gtask;
unsigned long lastsigdate;
Data(djvu_progress_callback *_callback):
callback(_callback), head(0), gtask(0), lastsigdate(0) {}
};
static GPMap<void *,DjVuProgressTask::Data> &
get_map(void)
{
static GPMap<void *,DjVuProgressTask::Data> xmap;
return xmap;
}
djvu_progress_callback *
DjVuProgressTask::set_callback(djvu_progress_callback *_callback)
{
djvu_progress_callback *retval=0;
if(_callback)
{
GMap<void *,GP<DjVuProgressTask::Data> > &map=get_map();
void *threadID=GThread::current();
if(map.contains(threadID))
{
DjVuProgressTask::Data &data=*(map[threadID]);
retval=data.callback;
data.callback=_callback;
data.head=0;
data.gtask=0;
data.lastsigdate=0;
}else
{
map[threadID]=new Data(_callback);
}
}else
{
GMap<void *,GP<DjVuProgressTask::Data> > &map=get_map();
void *threadID=GThread::current();
if(map.contains(threadID))
{
DjVuProgressTask::Data &data=*(map[threadID]);
retval=data.callback;
data.callback=0;
data.head=0;
data.gtask=0;
data.lastsigdate=0;
map.del(threadID);
}
}
return retval;
}
DjVuProgressTask::DjVuProgressTask(const char *xtask,int nsteps)
: task(xtask),parent(0), nsteps(nsteps), runtostep(0), gdata(0), data(0)
{
// gtask=task;
{
GMap<void *,GP<DjVuProgressTask::Data> > &map=get_map();
void *threadID=GThread::current();
if(map.contains(threadID))
{
gdata=new GP<Data>;
Data &d=*(data=((*(GP<Data> *)gdata)=map[threadID]));
if(d.callback)
{
unsigned long curdate = GOS::ticks();
startdate = curdate;
if (!d.head)
d.lastsigdate = curdate + INITIAL;
parent = d.head;
d.head = this;
}
}
}
}
DjVuProgressTask::~DjVuProgressTask()
{
if (data && data->callback)
{
if (data->head != this)
G_THROW( ERR_MSG("DjVuGlobal.not_compatible") );
data->head = parent;
if (!parent)
{
unsigned long curdate = GOS::ticks();
if((*(data->callback))(data->gtask?data->gtask:"",curdate-startdate, curdate-startdate))
{
G_THROW("INTERRUPT");
}
}
}
delete (GP<Data> *)gdata;
}
void
DjVuProgressTask::run(int tostep)
{
if(data)
{
data->gtask=task;
if ((data->callback)&&(tostep>runtostep))
{
unsigned long curdate = GOS::ticks();
if (curdate > data->lastsigdate + INTERVAL)
signal(curdate, curdate);
runtostep = tostep;
}
}
}
void
DjVuProgressTask::signal(unsigned long curdate, unsigned long estdate)
{
int inprogress = runtostep;
if (inprogress > nsteps)
inprogress = nsteps;
if (inprogress > 0)
{
const unsigned long enddate = startdate+
(unsigned long)(((float)(estdate-startdate) * (float)nsteps) / (float)inprogress);
if (parent)
{
parent->signal(curdate, enddate);
}
else if (data && data->callback && curdate<enddate)
{
if((*(data->callback))(data->gtask?data->gtask:"",curdate-startdate, enddate-startdate))
{
G_THROW("INTERRUPT");
}
data->lastsigdate = curdate;
}
}
}
// Progress callback
//
djvu_progress_callback *
djvu_set_progress_callback( djvu_progress_callback *callback )
{
return DjVuProgressTask::set_callback(callback);
}
int djvu_supports_progress_callback(void) {return 1;}
#else
#ifndef HAS_DJVU_PROGRESS_TYPEDEF
extern "C"
{
void *djvu_set_progress_callback(void *);
int djvu_supports_progress_callback(void);
}
void *djvu_set_progress_callback(void *) { return 0; }
int djvu_supports_progress_callback(void) {return 0;}
#else
int djvu_supports_progress_callback(void) {return 0;}
djvu_progress_callback *
djvu_set_progress_callback( djvu_progress_callback *) { return 0; }
#endif
#endif
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