#include "Singleton.hpp"

#include <cstring>

#include <algorithm>

namespace sh::core

{

std::mutex ISingleton::mu{};

std::vector<ISingleton::InstanceInfo> ISingleton::instance{};

auto ISingleton::CreateInstance(uint64_t hash, std::size_t size) -> Result

{

std::lock_guard<std::mutex> lock{ mu };

auto it = std::find_if(instance.begin(), instance.end(), [&](const InstanceInfo& info)

{

return info.hash == hash && info.size == size;

}

);

if (it != instance.end())

return Result{ it->ptr, false };

void* ptr = ::operator new(size);

std::memset(ptr, 0, size);

instance.push_back(InstanceInfo{ hash, size, ptr });

return Result{ ptr, true };

}

void ISingleton::DeleteInstance(uint64_t hash, std::size_t size)

{

std::lock_guard<std::mutex> lock{ mu };

auto it = std::find_if(instance.begin(), instance.end(), [&](const InstanceInfo& info)

{

return info.hash == hash && info.size == size;

}

);

if (it == instance.end())

return;

void* instancePtr = it->ptr;

::operator delete(instancePtr);

instance.erase(it);

}

}//namespace