void palla() {
int i, col, dcol = 0; /* indice del task */
int x, y; /* coordinate grafiche pallina */
int ox, oy; /* vecchia posizione pallina */
int x0; /* posizione iniziale X pallina */
float vx, vy; /* velocità della pallina */
float t, tx; /* variabile temporale */
// float z, z0; /* posizione della pallina */
float dt; /* incremento temporale */
double a; /* variabile di appoggio */
// long j, k;
i = ptask_get_index();
col = 2 + i % 14;
y = oy = (TOP - L);
x = ox = x0 = XMIN;
a = 2. * G * (float)(TOP - L);
vy = sqrt(a);
vx = VELX;
tx = 0.0;
t = vy / G;
dt = ptask_get_period(i, MILLI) / 100.;
// removed, unless a specific activation from the main is done
// wait_for_activation();
while (1) {
x = x0 + vx * tx;
y = BASE + vy * t - .5 * G * t * t;
if (y < BASE) {
t = 0.0;
pthread_mutex_lock(&mxv);
v0[i] = .9 * v0[i];
vy = v0[i];
pthread_mutex_unlock(&mxv);
y = BASE + vy * t - .5 * G * t * t;
}
if (x > XMAX) {
tx = 0.0;
x0 = XMAX;
vx = -vx;
x = x0 + vx * tx;
}
if (x < XMIN) {
tx = 0.0;
x0 = XMIN;
vx = -vx;
x = x0 + vx * tx;
}
pthread_mutex_lock(&mxa);
draw_ball(ox, YWIN - oy, BGC);
draw_ball(x, YWIN - y, col);
pthread_mutex_unlock(&mxa);
oy = y;
ox = x;
t += dt;
tx += dt;
/* check for deadline miss */
if (ptask_deadline_miss()) {
dcol = dcol % 15 + 1;
pthread_mutex_lock(&mxa);
rectfill(screen, 400, 50, 450, 70, dcol);
pthread_mutex_unlock(&mxa);
}
ptask_wait_for_period();
}
}
void task()
{
int x;
long t;
int i, k;
int lev1, lev2, col;
int at = 0;
i = ptask_get_index();
lev1 = LEV0 + DLEV*i - 2;
lev2 = LEV0 + DLEV*i - 2 - DEX;
col = 1 + i%15;
//wait_for_activation();
while (x < 640L) {
//dl = at + ptask_get_deadline(i, MILLI);
for (k=0; k<prtime[i]; k++) {
t = ptask_gettime(MILLI);
x = OFFSET + t/scale;
pthread_mutex_lock(&mxa);
line(screen, x, lev1, x, lev2, col);
pthread_mutex_unlock(&mxa);
while (ptask_gettime(MILLI) == t);
}
/*----------------------------------------------*/
/* Critical section guarded by muxA */
/*----------------------------------------------*/
if ((i != 2) && (i != 4)) {
pthread_mutex_lock(&muxA);
for (k=0; k<csa[i]; k++) {
t = ptask_gettime(MILLI);
x = OFFSET + t/scale;
pthread_mutex_lock(&mxa);
line(screen, x, lev1-1, x, lev2+1, CSCOLA);
pthread_mutex_unlock(&mxa);
while (ptask_gettime(MILLI) == t);
}
pthread_mutex_unlock(&muxA);
}
/*----------------------------------------------*/
if (i != 4) {
for (k=0; k<prtime[i]; k++) {
t = ptask_gettime(MILLI);
x = OFFSET + t/scale;
pthread_mutex_lock(&mxa);
line(screen, x, lev1, x, lev2, col);
pthread_mutex_unlock(&mxa);
while (ptask_gettime(MILLI) == t);
}
}
/*----------------------------------------------*/
/* Critical section guarded by muxB */
/*----------------------------------------------*/
if (i != 2) {
pthread_mutex_lock(&muxB);
for (k=0; k<csb[i]; k++) {
t = ptask_gettime(MILLI);
x = OFFSET + t/scale;
pthread_mutex_lock(&mxa);
line(screen, x, lev1-1, x, lev2+1, CSCOLB);
pthread_mutex_unlock(&mxa);
while (ptask_gettime(MILLI) == t);
}
pthread_mutex_unlock(&muxB);
}
/*----------------------------------------------*/
if (ptask_deadline_miss()) {
// TO BE DONE
//sprintf(s, "%d", task_dmiss(i));
//textout_ex(screen, font, s, OFFSET+dl/scale-4, lev1+8, 7, 0);
}
ptask_wait_for_period();
at = at + ptask_get_period(i,MILLI);
}
}
