/*
**  ClanLib SDK
**  Copyright (c) 1997-2015 The ClanLib Team
**
**  This software is provided 'as-is', without any express or implied
**  warranty.  In no event will the authors be held liable for any damages
**  arising from the use of this software.
**
**  Permission is granted to anyone to use this software for any purpose,
**  including commercial applications, and to alter it and redistribute it
**  freely, subject to the following restrictions:
**
**  1. The origin of this software must not be misrepresented; you must not
**     claim that you wrote the original software. If you use this software
**     in a product, an acknowledgment in the product documentation would be
**     appreciated but is not required.
**  2. Altered source versions must be plainly marked as such, and must not be
**     misrepresented as being the original software.
**  3. This notice may not be removed or altered from any source distribution.
**
**  Note: Some of the libraries ClanLib may link to may have additional
**  requirements or restrictions.
**
**  File Author(s):
**
**    Harry Storbacka
*/



#pragma once

#include <memory>

namespace clan
{
/// \addtogroup clanCore_System clanCore System
/// \{

#if defined(_MSC_VER)
#define cl_tls_variable _declspec(thread)
#elif defined(__APPLE__) // To do: change check to only apply to iOS/ARM target
#define cl_tls_variable
#else
#define cl_tls_variable __thread
#endif

class ThreadLocalStorage_Instance;

class ThreadLocalStorageData
{
public:
	virtual ~ThreadLocalStorageData() { }
};

class ThreadLocalStorage_Impl;

/// \brief ThreadLocalStorage class.
class ThreadLocalStorage
{
/// \name Construction
/// \{

public:
	/// \brief Constructs a Thread Local Storage object.
	ThreadLocalStorage();

	~ThreadLocalStorage();

private:

/// \}
/// \name Attributes
/// \{

public:
	/// \brief Get a variable.
	static std::shared_ptr<ThreadLocalStorageData> get_variable(const std::string &name);


/// \}
/// \name Operations
/// \{

public:
	/// \brief Set a variable.
	static void set_variable(const std::string &name, std::shared_ptr<ThreadLocalStorageData> ptr);


/// \}
/// \name Implementation
/// \{

private:
/// \}
	static void init_core();
	static ThreadLocalStorage_Instance *instance;
	friend class ThreadLocalStorage_Instance;
};

}

/// \}
