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//#include <SDL2/SDL.h>
//#include <SDL2/SDL_thread.h>
//#include <iostream>
//#include <sstream>
//#include <stdexcept>
//
//class SdlMutex
//{
//public:
// SdlMutex()
// {
// mutex = SDL_CreateMutex();
// if (!mutex) throw std::runtime_error("SDL_CreateMutex == NULL");
// }
//
// ~SdlMutex()
// {
// SDL_DestroyMutex(mutex);
// }
//
// void lock()
// {
// if (SDL_mutexP(mutex) == -1) throw std::runtime_error("SDL_mutexP == -1");
// // Note:
// // -1 does not mean it was already locked - it means there was an error in locking -
// // if it was locked it will just block - see SDL_mutexP(3)
// }
//
// void unlock()
// {
// if (SDL_mutexV(mutex) == -1) throw std::runtime_error("SDL_mutexV == -1");
// }
//
// SDL_mutex* underlying()
// {
// return mutex;
// }
//private:
// SDL_mutex* mutex;
//};
//
//class SdlScopedLock
//{
//public:
// SdlScopedLock(SdlMutex& mutex)
// :
// mutex(mutex)
// {
// mutex.lock();
// }
// ~SdlScopedLock()
// {
// try
// {
// this->unlock();
// }
// catch (const std::exception& e)
// {
// // Destructors should never throw ...
// std::cerr << "SdlScopedLock::~SdlScopedLock - caught : " << e.what() << std::endl;
// }
// }
// void unlock()
// {
// mutex.unlock();
// }
//private:
// SdlMutex& mutex;
//};
//
//class ThreadData
//{
//public:
// ThreadData()
// :
// dataReady(false),
// done(false)
// {
// condition = SDL_CreateCond();
// }
//
// ~ThreadData()
// {
// SDL_DestroyCond(condition);
// }
//
// // Using stringstream so I can just shift on integers...
// std::stringstream data;
// bool dataReady;
// bool done;
// SdlMutex mutex;
// SDL_cond* condition;
//};
//
//int threadFunction(void* data)
//{
// try
// {
// ThreadData* threadData = static_cast< ThreadData* >(data);
//
// for (size_t i = 0; i < 100; i++)
// {
// {
// SdlScopedLock lock(threadData->mutex);
// // Everything in this scope is now syncronized with the mutex
// if (i != 0) threadData->data << ", ";
// threadData->data << i;
// threadData->dataReady = true;
// } // threadData->mutex is automatically unlocked here
// // Its important to note that condition should be signaled after mutex is unlocked
// if (SDL_CondSignal(threadData->condition) == -1) throw std::runtime_error("Failed to signal");
// }
// {
// SdlScopedLock lock(threadData->mutex);
// threadData->done = true;
// }
// if (SDL_CondSignal(threadData->condition) == -1) throw std::runtime_error("Failed to signal");
// return 0;
// }
// catch (const std::exception& e)
// {
// std::cerr << "Caught : " << e.what() << std::endl;
// return 1;
// }
//}
//
//int main(int argc, char* argv[])
//{
// ThreadData threadData;
// SDL_Thread* thread = SDL_CreateThread(threadFunction, "", &threadData);
//
// while (true)
// {
// SdlScopedLock lock(threadData.mutex);
// while (threadData.dataReady == false && threadData.done == false)
// {
// // NOTE: must call condition wait with mutex already locked
// if (SDL_CondWait(threadData.condition, threadData.mutex.underlying()) == -1) throw std::runtime_error("Failed to wait");
// }
// // once dataReady == true or threadData.done == true we get here
// std::cout << "Got data = " << threadData.data.str() << std::endl;
// threadData.data.str("");
// threadData.dataReady = false;
// if (threadData.done)
// {
// std::cout << "child done - ending" << std::endl;
// break;
// }
// }
//
// int status = 99;
// SDL_WaitThread(thread, &status);
// std::cerr << "Thread completed with : " << status << std::endl;
//}
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