traces will be dumped. The program stops and waits for one character of
input at the beginning and end of the interval.
- $Id: worm.c,v 1.83 2022/07/09 20:51:25 tom Exp $
+ $Id: worm.c,v 1.84 2022/07/23 17:06:16 tom Exp $
*/
#include <test.priv.h>
static chtype trail = ' ';
static unsigned pending;
+
+#ifdef USE_PTHREADS
+#define Locked(statement) { \
+ pthread_mutex_lock(&pending_mutex); \
+ statement; \
+ pthread_mutex_unlock(&pending_mutex); \
+ }
+pthread_mutex_t pending_mutex;
+#else
+#define Locked(statement) statement
+#endif
+
#ifdef TRACE
static int generation, trace_start, trace_end;
#endif /* TRACE */
WORM *w = (WORM *) data;
const struct options *op;
unsigned mask = (unsigned) (~(1 << (w - worm)));
- chtype attrs = w->attrs | ((mask & pending) ? A_REVERSE : 0);
+ chtype attrs;
int x;
int y;
int h;
bool done = FALSE;
+ bool is_pending;
+
+ Locked(is_pending = ((mask & pending) != 0));
+
+ attrs = w->attrs | (is_pending ? A_REVERSE : 0);
if ((x = w->xpos[h = w->head]) < 0) {
wmove(win, y = w->ypos[h] = last_y, x = w->xpos[h] = 0);
static bool
quit_worm(int bitnum)
{
- pending = (pending | (unsigned) (1 << bitnum));
+ Locked(pending = (pending | (unsigned) (1 << bitnum)));
+
napms(10); /* let the other thread(s) have a chance */
- pending = (pending & (unsigned) ~(1 << bitnum));
+
+ Locked(pending = (pending & (unsigned) ~(1 << bitnum)));
+
return quitting;
}
USING_WINDOW1(stdscr, wrefresh, safe_wrefresh);
nodelay(stdscr, TRUE);
+#ifdef USE_PTHREADS
+ pthread_mutex_init(&pending_mutex, NULL);
+#endif
+
while (!done) {
- ++sequence;
+ Locked(++sequence);
if ((ch = get_input()) > 0) {
#ifdef TRACE
if (trace_start || trace_end) {