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/*
* Copyright (c) 2008-2017, NVIDIA CORPORATION. All rights reserved.
*
* NVIDIA CORPORATION and its licensors retain all intellectual property
* and proprietary rights in and to this software, related documentation
* and any modifications thereto. Any use, reproduction, disclosure or
* distribution of this software and related documentation without an express
* license agreement from NVIDIA CORPORATION is strictly prohibited.
*/
#ifndef LINK_H
#define LINK_H
#include "PxSimpleTypes.h"
#include "PxAssert.h"
namespace nvidia
{
namespace apex
{
class Link
{
public:
Link()
{
adj[1] = adj[0] = this;
}
virtual ~Link()
{
remove();
}
/*
which = 0: (-A-...-B-link-) + (-this-X-...-Y-) = (-A-...-B-link-this-X-...-Y-)
which = 1: (-X-...-Y-this-) + (-link-A-...-B-) = (-X-...-Y-this-link-A-...-B-)
*/
void setAdj(uint32_t which, Link* link)
{
uint32_t other = (which &= 1) ^ 1;
Link* linkAdjOther = link->adj[other];
adj[which]->adj[other] = linkAdjOther;
linkAdjOther->adj[which] = adj[which];
adj[which] = link;
link->adj[other] = this;
}
Link* getAdj(uint32_t which) const
{
return adj[which & 1];
}
void remove()
{
adj[1]->adj[0] = adj[0];
adj[0]->adj[1] = adj[1];
adj[1] = adj[0] = this;
}
bool isSolitary() const
{
PX_ASSERT((adj[0] == this) == (adj[1] == this));
return adj[0] == this;
}
protected:
Link* adj[2];
};
}
} // end namespace nvidia::apex
#endif // #ifndef LINK_H
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