// ==========================================================================
//
// context.cpp	Rendering Context Class for 3D Rendering Library
//
// --------------------------------------------------------------------------
//
// 08-07-2003	Hans-Martin Will	initial version
//
// --------------------------------------------------------------------------
//
// Copyright (c) 2004, Hans-Martin Will. All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without 
// modification, are permitted provided that the following conditions are 
// met:
// 
//	 *  Redistributions of source code must retain the above copyright
// 		notice, this list of conditions and the following disclaimer. 
//   *	Redistributions in binary form must reproduce the above copyright
// 		notice, this list of conditions and the following disclaimer in the 
// 		documentation and/or other materials provided with the distribution. 
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 
// OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 
// THE POSSIBILITY OF SUCH DAMAGE.
//
// ==========================================================================


#include "stdafx.h"
#include "Context.h"
#include "Surface.h"
#include "Rasterizer.h"
#include <pthread.h>

using namespace EGL;

extern pthread_key_t s_TlsIndexContext;

// --------------------------------------------------------------------------
// Context Management
// --------------------------------------------------------------------------
void Context :: SetCurrentContext(Context * context) 
{
    Context * oldContext = GetCurrentContext();

    if (oldContext != context) 
    {
        if (oldContext != 0) 
            oldContext->SetCurrent(false);
        
        pthread_setspecific(s_TlsIndexContext, 
                            reinterpret_cast<void *>(context));

        if (context != 0)
            context->SetCurrent(true);
    }
}


Context * Context :: GetCurrentContext() 
{
    return reinterpret_cast<EGLContext> (
        pthread_getspecific(s_TlsIndexContext));
}