void *rgb (void *arg)
{
arg_s *a = arg;
u64 start, finish;
unint i;
rgb_lock(a->name, &Red);
start = nsecs();
for (i = Loops; i; i--) {
#if (!DEBUG && !MUTEX && !SPIN && !TSPIN)
donothing();
#endif
rgb_lock(a->name, &Green);
rgb_unlock(a->name, &Red);
rgb_lock(a->name, &Blue);
rgb_unlock(a->name, &Green);
rgb_lock(a->name, &Red);
rgb_unlock(a->name, &Blue);
}
rgb_unlock(a->name, &Red);
finish = nsecs();
printf("%s %g nsecs per lock-unlock pair\n", a->name,
((double)(finish - start))/(3 * Loops));
return NULL;
}
void *producer (void *arg)
{
u64 start, finish;
unint wait = 0;
unint i;
++P;
while (P > C) {
sleep(0);
}
printf("Producer\n");
start = nsecs();
for (i = 0; i < Loops; i++, P++) {
while (P > C) {
#if SLEEP
sleep(0);
#elif DONOTHING
donothing();
#endif
++wait;
}
}
finish = nsecs();
printf("producer %g nsecs per increment and %g waits\n",
((double)(finish - start)) / Loops, (double)wait / Loops);
return NULL;
}
void *rgb (void *arg)
{
arg_s *a = arg;
u64 start, finish;
unint red = a->id;
unint green = a->id + 1;
unint i;
rgb_lock(a->name, &Lock[red]);
dec_count();
rgb_lock("start", &StartLock);
rgb_unlock("start", &StartLock);
start = nsecs();
for (i = Loops; i; i--) {
#if (!DEBUG && !MUTEX && !SPIN && !TSPIN)
donothing();
#endif
rgb_lock(a->name, &Lock[green]);
rgb_unlock(a->name, &Lock[red]);
if (++red == Num_locks) red = 0;
if (++green == Num_locks) green = 0;
}
rgb_unlock(a->name, &Lock[red]);
finish = nsecs();
printf("%s %g nsecs per lock-unlock pair\n", a->name,
((double)(finish - start))/Loops);
return NULL;
}
void *consumer (void *arg)
{
u64 start, finish;
unint wait = 0;
unint i;
printf("Consumer\n");
start = nsecs();
for (i = 0; i < Loops; i++, C++) {
while (C >= P) {
#if SLEEP
sleep(0);
#elif DONOTHING
donothing();
#endif
++wait;
}
}
finish = nsecs();
printf("consumer %g nsecs per increment and %g waits\n",
((double)(finish - start)) / Loops, (double)wait / Loops);
return NULL;
}
