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/* babl - dynamically extendable universal pixel conversion library.
* Copyright (C) 2009 Martin Nordholts
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <pthread.h>
#include "babl.h"
#define N_THREADS 10
#define N_PIXELS 1000000 /* (per thread) */
/* should be the same as HASH_TABLE_SIZE in babl/babl-palette.c */
#define BABL_PALETTE_HASH_TABLE_SIZE 1111
typedef struct
{
const Babl *fish;
unsigned char src[4 * N_PIXELS];
unsigned char dest[N_PIXELS];
} ThreadContext;
static void *
thread_proc (void *data)
{
ThreadContext *ctx = data;
babl_process (ctx->fish, ctx->src, ctx->dest, N_PIXELS);
return NULL;
}
int
main (int argc,
char **argv)
{
const Babl *pal;
const Babl *pal_format;
unsigned char colors[4 * N_THREADS];
pthread_t threads[N_THREADS];
ThreadContext *ctx[N_THREADS];
int i, j;
int OK = 1;
babl_init ();
/* create a palette of N_THREADS different colors, all of which have the same
* hash
*/
pal = babl_new_palette (NULL, &pal_format, NULL);
for (i = 0; i < N_THREADS; i++)
{
unsigned char *p = &colors[4 * i];
unsigned int v;
v = i * BABL_PALETTE_HASH_TABLE_SIZE;
p[0] = (v >> 0) & 0xff;
p[1] = (v >> 8) & 0xff;
p[2] = (v >> 16) & 0xff;
p[3] = 0xff;
}
babl_palette_set_palette (pal, babl_format ("R'G'B'A u8"), colors, N_THREADS);
/* initialize the thread contexts such that each thread processes a buffer
* containing a single, distinct color
*/
for (i = 0; i < N_THREADS; i++)
{
ctx[i] = malloc (sizeof (ThreadContext));
ctx[i]->fish = babl_fish (babl_format ("R'G'B'A u8"), pal_format);
for (j = 0; j < 4 * N_PIXELS; j++)
{
ctx[i]->src[j] = colors[4 * i + j % 4];
}
}
/* run all threads at the same time */
for (i = 0; i < N_THREADS; i++)
{
pthread_create (&threads[i],
NULL, /* attr */
thread_proc,
ctx[i]);
}
/* wait for them to finish */
for (i = 0; i < N_THREADS; i++)
{
pthread_join (threads[i],
NULL /* thread_return */);
}
/* verify the results */
for (i = 0; i < N_THREADS; i++)
{
for (j = 0; OK && j < N_PIXELS; j++)
{
OK = (ctx[i]->dest[j] == i);
}
free (ctx[i]);
}
babl_exit ();
return ! OK;
}
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