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threaded_generator.c
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threaded_generator.c
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#include <stdio.h>
#include <pthread.h>
#include "threaded_generator.h"
void* work(void *data)
{
struct job_data *j = data;
j->generator(
j->buf,
j->width, j->height,
j->frame_x, j->frame_y, j->frame_w, j->frame_h,
j->min_x, j->min_y, j->max_x, j->max_y,
j->N, j->iter,
j->C, j->colors, j->def_color
);
pthread_exit(NULL);
return NULL;
}
void threaded_generate(
generator_fun_t generator,
int nthreads,
int *buf,
int width, int height,
int frame_x, int frame_y, int frame_w, int frame_h,
double min_x, double min_y, double max_x, double max_y,
double N, int iter,
int C, int colors[], int def_color
)
{
pthread_t threads[nthreads];
struct job_data params[nthreads];
for (int i = 0; i < nthreads; ++i) {
/* height of a single thread */
int thr_height = frame_h/nthreads;
if (i == nthreads - 1)
thr_height = frame_h - thr_height*(nthreads-1);
struct job_data tparams = {
.generator = generator,
.buf = buf,
.width = width, .height = height,
.frame_x = frame_x, .frame_y = frame_y+i*(frame_h/nthreads),
.frame_w = frame_w, .frame_h = thr_height,
.min_x = min_x, .min_y = min_y, .max_x = max_x, .max_y = max_y,
.N = N, .iter = iter,
.C = C, .colors = colors, .def_color = def_color
};
params[i] = tparams;
pthread_create(&threads[i], NULL, &work, (void*)¶ms[i]);
}
for (int i = 0; i < nthreads; ++i)
pthread_join(threads[i], NULL);
}