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