#include "lock.hpp"
#include <stdio.h>

void LockClass::DeadLock(SpinLockData Lock)
{
    fprintf(stdout, "Potential deadlock in lock '%s' held by '%s'! %ld locks in queue.",
            Lock.AttemptingToGet, Lock.CurrentHolder, Lock.Count);
}

int LockClass::Lock(const char *FunctionName)
{
    LockData.AttemptingToGet = FunctionName;
Retry:
    unsigned int i = 0;
    while (__atomic_exchange_n(&IsLocked, true, __ATOMIC_ACQUIRE) && ++i < 0x10000000)
        ;
    if (i >= 0x10000000)
    {
        DeadLock(LockData);
        goto Retry;
    }
    LockData.Count++;
    LockData.CurrentHolder = FunctionName;
    __sync_synchronize();
    return 0;
}

int LockClass::Unlock()
{
    __sync_synchronize();
    __atomic_store_n(&IsLocked, false, __ATOMIC_RELEASE);
    LockData.Count--;
    IsLocked = false;
    return 0;
}