int main(void)
{
int nthr = 4; //get_nprocs_conf();
int ndx;
int delta = HEIGHT / nthr;
int ofs = 0;
struct mandelthr *args;
pthread_t *thrtab = calloc(nthr, sizeof(pthread_t));
pthread_t **thrptrtab = calloc(nthr, sizeof(pthread_t *));
fprintf(stderr, "mandel launching %d threads\n", nthr);
/* Make a window! */
init_x11(WIDTH);
init_colours();
g_mandel.nthr = nthr;
for (ndx = 0 ; ndx < nthr ; ndx++) {
args = calloc(1, sizeof(struct mandelthr));
args->yofs = ofs;
args->ylim = ofs + delta;
pthread_create(&thrtab[ndx], NULL, mandel_start, args);
ofs += delta;
}
for (ndx = 0 ; ndx < nthr ; ndx++) {
pthread_join(thrtab[ndx], (void **)&thrptrtab[ndx]);
}
do {
// pthread_yield();
// m_waitspin();
usleep(50000);
pthread_yield();
} while (g_mandel.nthr);
XPutImage(g_x11.dpy, g_x11.win, g_x11.gc, g_x11.bitmap,
0, 0, 0, 0,
WIDTH, HEIGHT);
XFlush(g_x11.dpy);
// display_double(ASIZE, xmin, xmax, ymin, ymax);
#ifdef WAIT_EXIT
while(1)
{
XEvent event;
KeySym key;
char text[255];
XNextEvent(g_x11.dpy, &event);
/* Just redraw everything on expose */
if ((event.type == Expose) && !event.xexpose.count)
{
XPutImage(g_x11.dpy, g_x11.win, g_x11.gc, g_x11.bitmap,
0, 0, 0, 0,
WIDTH, HEIGHT);
}
/* Press 'q' to quit */
if ((event.type == KeyPress) &&
XLookupString(&event.xkey, text, 255, &key, 0) == 1)
{
if (text[0] == 'q') break;
}
/* Or simply close the window */
if ((event.type == ClientMessage) &&
((Atom) event.xclient.data.l[0] == g_x11.wmdelmsg))
{
break;
}
}
#endif
sleep(5);
/* Done! */
exit_x11();
return 0;
}
static void init_x11(int size)
{
char name[128] = "Mandelbrot";
int bytes_per_pixel;
unsigned long white;
unsigned long black;
XTextProperty tp;
char *n = name;
Status st;
unsigned int ii, jj;
unsigned int depth;
Visual *visual;
int total;
XInitThreads();
/* Attempt to open the display */
g_x11.dpy = XOpenDisplay(NULL);
white = WhitePixel(g_x11.dpy,DefaultScreen(g_x11.dpy));
black = BlackPixel(g_x11.dpy,DefaultScreen(g_x11.dpy));
depth = DefaultDepth(g_x11.dpy, DefaultScreen(g_x11.dpy));
visual = DefaultVisual(g_x11.dpy, DefaultScreen(g_x11.dpy));
/* Failure */
if (!g_x11.dpy) exit(0);
g_x11.win = XCreateSimpleWindow(g_x11.dpy,
DefaultRootWindow(g_x11.dpy),
0, 0,
size, size,
0, black,
white);
/* We want to be notified when the window appears */
XSelectInput(g_x11.dpy, g_x11.win, ExposureMask);
/* Make it appear */
XMapWindow(g_x11.dpy, g_x11.win);
#if 0
while (1)
{
XEvent e;
XNextEvent(g_x11.dpy, &e);
if (e.type == MapNotify) break;
}
#endif
/* we need to wait for the Expose event instead of MapNotify */
while (1)
{
XEvent e;
XNextEvent(g_x11.dpy, &e);
if (e.type == Expose) break;
}
st = XStringListToTextProperty(&n, 1, &tp);
if (st) XSetWMName(g_x11.dpy, g_x11.win, &tp);
/* Wait for the MapNotify event */
XFlush(g_x11.dpy);
/* Determine total bytes needed for image */
ii = 1;
jj = (depth - 1) >> 2;
while (jj >>= 1) ii <<= 1;
/* Pad the scanline to a multiple of 4 bytes */
total = size * ii;
total = (total + 3) & ~3;
total *= size;
bytes_per_pixel = ii;
if (bytes_per_pixel != 4)
{
printf("Need 32bit colour screen!");
}
/* Make bitmap */
g_x11.bitmap = XCreateImage(g_x11.dpy, visual, depth,
ZPixmap, 0, malloc(total),
size, size, 32, 0);
/* Init GC */
g_x11.gc = XCreateGC(g_x11.dpy, g_x11.win, 0, NULL);
XSetForeground(g_x11.dpy, g_x11.gc, black);
if (bytes_per_pixel != 4)
{
printf("Need 32bit colour screen!\n");
exit_x11();
exit(0);
}
XSelectInput(g_x11.dpy, g_x11.win, ExposureMask | KeyPressMask | StructureNotifyMask);
g_x11.wmdelmsg = XInternAtom(g_x11.dpy, "WM_DELETE_WINDOW", False);
XSetWMProtocols(g_x11.dpy, g_x11.win, &g_x11.wmdelmsg, 1);
}
int main(void)
{
int nthr = get_nprocs_conf();
int ndx;
int delta = ASIZE / nthr;
int ofs = 0;
struct mandelthr *args;
pthread_t *thrtab = calloc(nthr, sizeof(pthread_t));
pthread_t **thrptrtab = calloc(nthr, sizeof(pthread_t *));
/* Make a window! */
init_x11(ASIZE);
init_colours();
g_nthr = nthr;
for (ndx = 0 ; ndx < nthr ; ndx++) {
args = calloc(1, sizeof(struct mandelthr));
args->yofs = ofs;
args->ylim = ofs + delta;
pthread_create(&thrtab[ndx], NULL, mandel_start, args);
ofs += delta;
}
for (ndx = 0 ; ndx < nthr ; ndx++) {
pthread_join(thrtab[ndx], (void **)&thrptrtab[ndx]);
}
do {
pthread_yield();
} while (g_nthr);
XPutImage(dpy, win, gc, bitmap,
0, 0, 0, 0,
ASIZE, ASIZE);
XFlush(dpy);
// display_double(ASIZE, xmin, xmax, ymin, ymax);
#ifdef WAIT_EXIT
while(1)
{
XEvent event;
KeySym key;
char text[255];
XNextEvent(dpy, &event);
/* Just redraw everything on expose */
if ((event.type == Expose) && !event.xexpose.count)
{
XPutImage(dpy, win, gc, bitmap,
0, 0, 0, 0,
ASIZE, ASIZE);
}
/* Press 'q' to quit */
if ((event.type == KeyPress) &&
XLookupString(&event.xkey, text, 255, &key, 0) == 1)
{
if (text[0] == 'q') break;
}
/* Or simply close the window */
if ((event.type == ClientMessage) &&
((Atom) event.xclient.data.l[0] == wmDeleteMessage))
{
break;
}
}
#endif
/* Done! */
exit_x11();
return 0;
}