void spinWithdraw1(int junk, int a) {
int res = 1;
int tries = 0;
int i;
int oldTries;
while(res != 0) {
//crap
oldTries = tries;
for(i = 0; i < oldTries; i++) {
tries--;
}
tries = oldTries;
res = _spin_trylock(&gLock1);
tries++;
oldTries = tries;
for(i = 0; i < oldTries; i++) {
tries--;
}
tries = oldTries;
}
donor1_blood -= a;
_spin_unlock(&gLock1);
}
void deposit2(int a) {
int res;
res = _spin_trylock(&gLock2);
if(res == 0) {
donor2_blood += a;
_spin_unlock(&gLock2);
}
}
int withdraw2(int a) {
int res;
res = _spin_trylock(&gLock2);
if(res == 0) {
donor2_blood -= a;
_spin_unlock(&gLock2);
}
return donor2_blood;
}
int func (void)
{
int mylock = 1;
int mylock2 = 1;
int mylock3 = 1;
if (!_spin_trylock(mylock)) {
return;
}
_spin_unlock(mylock);
_spin_unlock(mylock2);
if (a)
_spin_unlock(mylock);
_spin_lock(mylock2);
if (!_spin_trylock(mylock3))
return;
return;
}
int transfer(int a) {
int res;
int succ = 0;
res = _spin_trylock(&gLock1);
if(res == 0) {
res = _spin_trylock(&gLock2);
if(res == 0) {
if(donor1_blood >= a) {
donor1_blood -= a;
donor2_blood += a;
succ = 1;
}
_spin_unlock(&gLock2);
}
_spin_unlock(&gLock1);
}
return succ;
}
int safeDeposit(spinlock_t *l, int dnum, int a) {
int res;
int succ = 0;
res = _spin_trylock(l);
if(res == 0) {
switch (dnum) {
case 1: donor1_blood += a;
break;
case 2: donor2_blood += a;
break;
}
succ = 1;
}
if(res == 0) {
donor1_blood += 1;
_spin_unlock(l);
}
return succ;
}
