void unlock() {
tid zero(0);
tid thread_id = this_thread::get_id();
if(!block.compare_exchange_strong(thread_id, zero, memory_order_release)) {
throw new exception;
}
}
void unlock(int threadId) {
int freeFlag = -1, toReplace = threadId;;
if (!owner.compare_exchange_strong(threadId, freeFlag)) {
cerr << "Current owner " << threadId << " but "
<< "Thread number " + to_string(toReplace)
<< " is not the owner!" << endl;
}
}
void lock() {
tid zero(0);
tid thread_id = this_thread::get_id();
while(!block.compare_exchange_strong(zero, thread_id, std::memory_order_acquire)) {
std::this_thread::yield();
zero = tid(0);
}
}
int foo(atomic<int>& x)
{
for(size_t n = 0; ; ++n)
{
auto expected = x.load();
auto desired = 0;
x.compare_exchange_strong(
expected,
desired);
if(n == loop)
return desired;
}
}
void IncrementSharedValue10000000Times(RandomDelay& randomDelay)
{
int count = 0;
while (count < 10000000)
{
randomDelay.doBusyWork();
int expected = 0;
if (flag.compare_exchange_strong(expected, 1, memory_order_relaxed))
{
// Lock was successful
sharedValue++;
flag.store(0, memory_order_relaxed);
count++;
}
}
}
void lock(int threadId) {
int expected = -1;
while (!owner.compare_exchange_strong(expected, threadId)) {
expected = -1;
}
}
bool try_lock() {
tid zero(0);
tid thread_id = this_thread::get_id();
if(!block.compare_exchange_strong(zero, thread_id)) return false;
else return true;
}