ImLib3D.cpp

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/* ImLib3D
 * Copyright (c) 2001, ULP-IPB Strasbourg.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 * 
 * This program 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
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include<ImLib3D/ImLib3D.hpp>
#include<ImLib3D/Display.hpp>
#include<ImLib3D/TaskProgressManager.hpp>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>



ImLib3D imLib3D;

extern "C"
{
    // On HP, constructors are not called correctly when ImLib3D is used as a shared library. To initialize global variables correctly you must link (the shared version of) the library with the switch: '+I HPSharedLibInit'
    void HPSharedLibInit()
    {
        imLib3D.Init();
    }
}


ImLib3D::ImLib3D()
{
    Init();
}

void ImLib3D::Init()
{
    // this is necessary, otherwise numbers might have "," instead of "."
    setlocale(LC_NUMERIC, "C");
//      fprintf(stderr,"******************** Initializing IMLIB3D pid:%d parent:%d (%x)*********************\n",
//              getpid(),getppid(),(uint)this);

    // Check if ImLib3D's global constructors are being called twice
    // due to problems with shared libraries 
    // This is done by checking if pidCheckMultipleCtr and thisCheckMultipleCtr 
    // are already set
    if(pidCheckMultipleCtr!=getpid() || thisCheckMultipleCtr!=this)
    {
        //      printf("ImLib3D:first init\n");
        pidCheckMultipleCtr=getpid();
        thisCheckMultipleCtr=this;

        display=NULL;
        ImLib3DDisplay::Set(new ViewerDisplay());
        taskProgressManager=new TaskProgressManager(1,3);
        defaultTaskProgressManager=taskProgressManager;
        defaultTaskProgressManager->Start();
    }
    else
    {
        //      fprintf(stderr,"ImLib3D::ImLib3D ignoring multiple calls to global constructor due to shared library\n");
    }
}


ImLib3D::~ImLib3D()
{
//  fprintf(stderr,"#################### Destroying   IMLIB3D pid:%d parent:%d ##################### \n",
//          getpid(),getppid());

    if(pidCheckMultipleCtr==getpid() || thisCheckMultipleCtr==this)
    {
        // printf("ImLib3D:first destuct\n");
        pidCheckMultipleCtr=0;
        thisCheckMultipleCtr=NULL;
   
        if(taskProgressManager)
        {
            taskProgressManager->Stop();
            delete taskProgressManager;
        }
    }
    else
    {
        //fprintf(stderr,"ImLib3D::ImLib3D ignoring multiple calls to global destructor due to shared library\n");
    }
}

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