text: /*     CalculiX - A 3-dimensional finite element program                 */
  /*              Copyright (C) 1998-2020 Guido Dhondt                          */
  
  /*     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(version 2);    */
  /*                    */
  
  /*     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 <unistd.h>
  #include <stdio.h>
  #include <math.h>
  #include <stdlib.h>
  #include <pthread.h>
  #include "CalculiX.h"
  
  static ITG *nface1,*ielfa1,*ipnei1,*nef1,*num_cpus1;
  
  static double *vel1,*flux1,*vfa1;
  
  void hro_udmain(ITG *nface,ITG *ielfa,double *vel,ITG *ipnei,ITG *nef,
  		double *flux,double *vfa,ITG *num_cpus){
  
      ITG i;
        
      /* variables for multithreading procedure */
      
      ITG *ithread=NULL;;
      
      pthread_t tid[*num_cpus];
  
      /* calculation of the density at the cell centers */
      
      ielfa1=ielfa;vel1=vel;ipnei1=ipnei;nef1=nef;flux1=flux;vfa1=vfa;
      num_cpus1=num_cpus;nface1=nface;
      
      /* create threads and wait */
      
      NNEW(ithread,ITG,*num_cpus);
      for(i=0; i<*num_cpus; i++)  {
  	ithread[i]=i;
  	pthread_create(&tid[i], NULL, (void *)hro_ud1mt, (void *)&ithread[i]);
      }
      for(i=0; i<*num_cpus; i++)  pthread_join(tid[i], NULL);
      
      SFREE(ithread);
    
    return;
  
  }
  
  /* subroutine for multithreading of calcgammav1 */
  
  void *hro_ud1mt(ITG *i){
  
      ITG nfacea,nfaceb,nfacedelta;
  
      nfacedelta=(ITG)floor(*nface1/(double)(*num_cpus1));
      nfacea=*i*nfacedelta+1;
      nfaceb=(*i+1)*nfacedelta;
      if((*i==*num_cpus1-1)&&(nfaceb<*nface1)) nfaceb=*nface1;
  
      FORTRAN(hro_ud,(ielfa1,vel1,ipnei1,nef1,flux1,vfa1,
  			       &nfacea,&nfaceb));
  
      return NULL;
  }
  