/*
generate and save the entire fractal
returns: 0 if successful
1 otherwise
*/
int generate_fractal(char *file, float width, float height, int workers) {
/* TODO: use fork(), mmap(), and munmap() to create a region of shared memory
to store fractal data, as generated by several child processes */
int fd = open(file,O_RDONLY);
color_t *fractal_data = mmap(NULL,sizeof(color_t)*height*width,PROT_READ|PROT_WRITE,MAP_ANONYMOUS|MAP_SHARED,fd,0);
int i,status;
int pids[workers];
for(i = 0; i < workers; i++)
{
if((pids[i]=fork())==0)
{
generate_fractal_region(fractal_data, width, height, i*(height/workers), (height/workers));
munmap(fractal_data,sizeof(color_t)*height*width);
exit(0);
}
}
for(i = 0; i < workers; i++)
{
waitpid(pids[i],&status,0);
}
if (save_image_data(file, fractal_data, width, height)) {
fprintf(stderr, "error saving to image file.\n");
free(fractal_data);
return 1;
}
munmap(fractal_data,sizeof(color_t)*height*width);
printf("Complete.\n");
return 0;
}
/*
generate and save the entire fractal
returns: 0 if successful
1 otherwise
*/
int generate_fractal(char *file, float width, float height, int workers) {
color_t *fractal_data = malloc(sizeof(color_t)*width*height);
/*
generate data for the entire fractal
*/
generate_fractal_region(fractal_data, width, height, 0, height);
/*
save the generated fractal data into the file specified by argv[1]
*/
if (save_image_data(file, fractal_data, width, height)) {
fprintf(stderr, "error saving to image file.\n");
free(fractal_data);
return 1;
}
free(fractal_data);
printf("Complete \n");
return 0;
}
