Initial commit:

PhysX 3.4.0 Update @ 21294896
APEX 1.4.0 Update @ 21275617

[CL 21300167]

1 files changed, 118 insertions, 0 deletions

diff --git a/PxShared/src/foundation/include/PsHashMap.h b/PxShared/src/foundation/include/PsHashMap.h
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+// This code contains NVIDIA Confidential Information and is disclosed to you
+// under a form of NVIDIA software license agreement provided separately to you.
+//
+// Notice
+// NVIDIA Corporation and its licensors retain all intellectual property and
+// proprietary rights in and to this software and 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.
+//
+// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
+// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
+// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
+// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
+//
+// Information and code furnished is believed to be accurate and reliable.
+// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
+// information or for any infringement of patents or other rights of third parties that may
+// result from its use. No license is granted by implication or otherwise under any patent
+// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
+// This code supersedes and replaces all information previously supplied.
+// NVIDIA Corporation products are not authorized for use as critical
+// components in life support devices or systems without express written approval of
+// NVIDIA Corporation.
+//
+// Copyright (c) 2008-2016 NVIDIA Corporation. All rights reserved.
+// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
+// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
+
+#ifndef PSFOUNDATION_PSHASHMAP_H
+#define PSFOUNDATION_PSHASHMAP_H
+
+#include "PsHashInternals.h"
+
+// TODO: make this doxy-format
+//
+// This header defines two hash maps. Hash maps
+// * support custom initial table sizes (rounded up internally to power-of-2)
+// * support custom static allocator objects
+// * auto-resize, based on a load factor (i.e. a 64-entry .75 load factor hash will resize
+//                                        when the 49th element is inserted)
+// * are based on open hashing
+// * have O(1) contains, erase
+//
+// Maps have STL-like copying semantics, and properly initialize and destruct copies of objects
+//
+// There are two forms of map: coalesced and uncoalesced. Coalesced maps keep the entries in the
+// initial segment of an array, so are fast to iterate over; however deletion is approximately
+// twice as expensive.
+//
+// HashMap<T>:
+//		bool			insert(const Key& k, const Value& v)	O(1) amortized (exponential resize policy)
+//		Value &			operator[](const Key& k)				O(1) for existing objects, else O(1) amortized
+//		const Entry *	find(const Key& k);						O(1)
+//		bool			erase(const T& k);						O(1)
+//		uint32_t			size();									constant
+//		void			reserve(uint32_t size);					O(MAX(currentOccupancy,size))
+//		void			clear();								O(currentOccupancy) (with zero constant for objects
+// without
+// destructors)
+//      Iterator		getIterator();
+//
+// operator[] creates an entry if one does not exist, initializing with the default constructor.
+// CoalescedHashMap<T> does not support getIterator, but instead supports
+// 		const Key *getEntries();
+//
+// Use of iterators:
+//
+// for(HashMap::Iterator iter = test.getIterator(); !iter.done(); ++iter)
+//			myFunction(iter->first, iter->second);
+
+namespace physx
+{
+namespace shdfnd
+{
+template <class Key, class Value, class HashFn = Hash<Key>, class Allocator = NonTrackingAllocator>
+class HashMap : public internal::HashMapBase<Key, Value, HashFn, Allocator>
+{
+  public:
+	typedef internal::HashMapBase<Key, Value, HashFn, Allocator> HashMapBase;
+	typedef typename HashMapBase::Iterator Iterator;
+
+	HashMap(uint32_t initialTableSize = 64, float loadFactor = 0.75f) : HashMapBase(initialTableSize, loadFactor)
+	{
+	}
+	HashMap(uint32_t initialTableSize, float loadFactor, const Allocator& alloc)
+	: HashMapBase(initialTableSize, loadFactor, alloc)
+	{
+	}
+	HashMap(const Allocator& alloc) : HashMapBase(64, 0.75f, alloc)
+	{
+	}
+	Iterator getIterator()
+	{
+		return Iterator(HashMapBase::mBase);
+	}
+};
+
+template <class Key, class Value, class HashFn = Hash<Key>, class Allocator = NonTrackingAllocator>
+class CoalescedHashMap : public internal::HashMapBase<Key, Value, HashFn, Allocator>
+{
+  public:
+	typedef internal::HashMapBase<Key, Value, HashFn, Allocator> HashMapBase;
+
+	CoalescedHashMap(uint32_t initialTableSize = 64, float loadFactor = 0.75f)
+	: HashMapBase(initialTableSize, loadFactor)
+	{
+	}
+	const Pair<const Key, Value>* getEntries() const
+	{
+		return HashMapBase::mBase.getEntries();
+	}
+};
+
+} // namespace shdfnd
+} // namespace physx
+
+#endif // #ifndef PSFOUNDATION_PSHASHMAP_H