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#include "../core/configuration.h"
#if defined(jin_thread)
#include "thread.h"
namespace JinEngine
{
namespace Threads
{
class Mutex
{
public:
Mutex();
~Mutex();
void lock();
void unlock();
private:
#if jin_thread == jin_thread_sdl
SDL_mutex* mutex;
#endif
friend class Conditional;
};
// ̼߳signal wait
class Conditional
{
public:
Conditional();
~Conditional();
void signal();
void broadcast();
bool wait(Mutex* mutex, int timeout = -1);
private:
#if jin_thread == jin_thread_sdl
SDL_cond* cond;
#endif
};
class Lock
{
public:
Lock(Mutex* m) : mutex(m) {
mutex->lock();
}
Lock(Mutex& m) : mutex(&m) {
mutex->lock();
}
~Lock() {
mutex->unlock();
}
private:
Mutex* mutex;
Lock(Lock&) {}
};
//////////////////////////////////////////////////////////////////////
Mutex::Mutex()
{
#if jin_thread == jin_thread_sdl
mutex = SDL_CreateMutex();
#endif
}
Mutex::~Mutex()
{
#if jin_thread == jin_thread_sdl
SDL_DestroyMutex(mutex);
#endif
}
void Mutex::lock()
{
#if jin_thread == jin_thread_sdl
SDL_LockMutex(mutex);
#endif
}
void Mutex::unlock()
{
#if jin_thread == jin_thread_sdl
SDL_UnlockMutex(mutex);
#endif
}
//////////////////////////////////////////////////////////////////////
Conditional::Conditional()
{
#if jin_thread == jin_thread_sdl
cond = SDL_CreateCond();
#endif
}
Conditional::~Conditional()
{
#if jin_thread == jin_thread_sdl
SDL_DestroyCond(cond);
#endif
}
void Conditional::signal()
{
#if jin_thread == jin_thread_sdl
SDL_CondSignal(cond);
#endif
}
void Conditional::broadcast()
{
#if jin_thread == jin_thread_sdl
SDL_CondBroadcast(cond);
#endif
}
bool Conditional::wait(Mutex* mutex, int timeout)
{
#if jin_thread == jin_thread_sdl
if (timeout < 0)
return !SDL_CondWait(cond, mutex->mutex);
else
return (SDL_CondWaitTimeout(cond, mutex->mutex, timeout) == 0);
#endif
}
//////////////////////////////////////////////////////////////////////
Thread::ThreadData::ThreadData(Mutex* m, Conditional* c)
: mutex(m)
, condition(c)
, share()
{
}
Thread::ThreadData::~ThreadData()
{
}
void Thread::ThreadData::set(int slot, Variant value)
{
Lock l(mutex);
share[slot] = value;
}
Thread::Variant Thread::ThreadData::get(int slot)
{
Lock l(mutex);
return share[slot];
}
bool Thread::ThreadData::exist(int slot)
{
Lock l(mutex);
return share.count(slot) == 1;
}
void Thread::ThreadData::remove(int slot)
{
Lock l(mutex);
if (exist(slot))
{
share.erase(slot);
}
}
//////////////////////////////////////////////////////////////////////
Thread::Thread(const std::string tname, ThreadRunner runner)
: name(tname)
, running(false)
, threadRunner(runner)
{
mutex = new Mutex();
condition = new Conditional();
common = new Thread::ThreadData(mutex, condition);
}
Thread::~Thread()
{
#if jin_thread == jin_thread_sdl
#endif
}
const char* Thread::getName()
{
Lock l(mutex);
return name.c_str();
};
bool Thread::isRunning()
{
Lock l(mutex);
return running;
};
bool Thread::start(void* p)
{
Lock l(mutex);
if (running)
return false;
if (handle)
{
#if jin_thread == jin_thread_sdl
SDL_WaitThread(handle, nullptr);
#endif
}
#if jin_thread == jin_thread_sdl
handle = SDL_CreateThread(threadRunner, name.c_str(), p);
#elif jin_thread == jin_thread_cpp
handle = new std::thread();
#endif
return (running = (handle != nullptr));
}
void Thread::wait()
{
{
Lock l(mutex);
if (!handle)
return;
}
#if jin_thread == jin_thread_sdl
SDL_WaitThread(handle, nullptr);
#endif
Lock l(mutex);
running = false;
handle = nullptr;
}
void Thread::lock()
{
if (mutex != nullptr)
mutex->lock();
}
void Thread::unlock()
{
if (mutex != nullptr)
mutex->unlock();
}
void Thread::send(int slot, const Variant& value)
{
lock();
common->set(slot, value);
unlock();
condition->broadcast();
}
bool Thread::receive(int slot)
{
return common->exist(slot);
}
Thread::Variant Thread::fetch(int slot)
{
Thread::Variant v = common->get(slot);
return v;
}
Thread::Variant Thread::demand(int slot)
{
/**
* pthread_mutex_lock(mtx);
* while(pass == 0)
* {
* pthread_mutex_unlock(mtx);
* pthread_cond_just_wait(cv);
* pthread_mutex_lock(mtx);
* }
* pthread_mutex_unlock(mtx);
*/
lock();
while (!common->exist(slot))
{
if (common->exist(ThreadData::SLOT_ERROR))
return 0;
condition->wait(mutex);
}
Thread::Variant v = common->get(slot);
unlock();
return v;
}
void Thread::remove(int slot)
{
lock();
common->remove(slot);
unlock();
}
} // namespace Threads
} // namespace JinEngine
#endif // defined(jin_thread)
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