Hi Sergei,
I took example x00 and turned it into a multithreaded version. It worked as you
would expect - the picture is drawn correctly in the separate thread, no
problems there. It would seem that there is more to it than "merely" a
multithreaded environment.
Could you try this code and see what happens in your environment?
Regards,
Arjen
----
// Simple demo of a 2D line plot.
//
// Copyright (C) 2011 Alan W. Irwin
//
// This file is part of PLplot.
//
// PLplot is free software; you can redistribute it and/or modify
// it under the terms of the GNU Library General Public License as published
// by the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// PLplot 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 Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public License
// along with PLplot; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
//
#include <pthread.h>
#include "plcdemos.h"
#define NSIZE 101
typedef struct {
PLFLT *x;
PLFLT *y;
} thread_data;
void *thread_start( void *arg ) {
thread_data *pdata = arg;
plline( NSIZE, pdata->x, pdata->y );
return NULL;
}
int
main( int argc, const char *argv[] )
{
PLFLT x[NSIZE], y[NSIZE];
PLFLT xmin = 0., xmax = 1., ymin = 0., ymax = 100.;
int i;
pthread_t tid;
thread_data data;
void *res;
// Prepare data to be plotted.
for ( i = 0; i < NSIZE; i++ )
{
x[i] = (PLFLT) ( i ) / (PLFLT) ( NSIZE - 1 );
y[i] = ymax * x[i] * x[i];
}
// Parse and process command line arguments
plparseopts( &argc, argv, PL_PARSE_FULL );
// Initialize plplot
plinit();
// Create a labelled box to hold the plot.
plenv( xmin, xmax, ymin, ymax, 0, 0 );
pllab( "x", "y=100 x#u2#d", "Simple PLplot demo of a 2D line plot" );
// Plot the data that was prepared above.
data.x = x;
data.y = y;
pthread_create( &tid, NULL, thread_start, &data );
//plline( NSIZE, x, y );
// Close PLplot library
pthread_join( tid, &res );
plend();
exit( 0 );
}
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