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////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2016 Laurent Gomila (laurent@sfml-dev.org)
//
// 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.
//
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Window/GlResource.hpp>
#include <SFML/Window/GlContext.hpp>
#include <SFML/Window/Context.hpp>
#include <SFML/System/Mutex.hpp>
#include <SFML/System/Lock.hpp>
namespace
{
// OpenGL resources counter and its mutex
unsigned int count = 0;
sf::Mutex mutex;
}
namespace sf
{
////////////////////////////////////////////////////////////
GlResource::GlResource()
{
// Protect from concurrent access
Lock lock(mutex);
// If this is the very first resource, trigger the global context initialization
if (count == 0)
priv::GlContext::globalInit();
// Increment the resources counter
count++;
}
////////////////////////////////////////////////////////////
GlResource::~GlResource()
{
// Protect from concurrent access
Lock lock(mutex);
// Decrement the resources counter
count--;
// If there's no more resource alive, we can trigger the global context cleanup
if (count == 0)
priv::GlContext::globalCleanup();
}
////////////////////////////////////////////////////////////
void GlResource::ensureGlContext()
{
// Empty function for ABI compatibility, use acquireTransientContext instead
}
////////////////////////////////////////////////////////////
GlResource::TransientContextLock::TransientContextLock() :
m_context(0)
{
Lock lock(mutex);
if (count == 0)
{
m_context = new Context;
return;
}
priv::GlContext::acquireTransientContext();
}
////////////////////////////////////////////////////////////
GlResource::TransientContextLock::~TransientContextLock()
{
if (m_context)
{
delete m_context;
return;
}
priv::GlContext::releaseTransientContext();
}
} // namespace sf
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