feat(physics): wire physx sdk into build

engine/third_party/physx/source/common/src/CmRefCountable.h

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+// 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.
+//  * Neither the name of NVIDIA CORPORATION nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''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.
+//
+// Copyright (c) 2008-2025 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 CM_REFCOUNTABLE_H
+#define CM_REFCOUNTABLE_H
+
+#include "foundation/PxAssert.h"
+#include "foundation/PxAtomic.h"
+#include "foundation/PxAllocator.h"
+#include "common/PxBase.h"
+
+namespace physx
+{
+namespace Cm
+{
+	// PT: this is used to re-implement RefCountable using the ref-counter in PxBase, i.e. to dissociate
+	// the RefCountable data from the RefCountable code. The goal is to be able to store the ref counter
+	// in the padding bytes of PxBase, and also to avoid two v-table pointers in the class.
+	class RefCountableExt : public PxRefCounted
+	{
+		public:
+
+		RefCountableExt() : PxRefCounted(0, PxBaseFlags(0))	{}
+
+		void	preExportDataReset()
+		{
+			mBuiltInRefCount = 1;
+		}
+
+		void	incRefCount()
+		{
+			volatile PxI32* val = reinterpret_cast<volatile PxI32*>(&mBuiltInRefCount);
+			PxAtomicIncrement(val);
+			// value better be greater than 1, or we've created a ref to an undefined object
+			PX_ASSERT(mBuiltInRefCount>1);
+		}
+
+		void	decRefCount()
+		{
+			PX_ASSERT(mBuiltInRefCount>0);
+			volatile PxI32* val = reinterpret_cast<volatile PxI32*>(&mBuiltInRefCount);
+			if(physx::PxAtomicDecrement(val) == 0)
+				onRefCountZero();
+		}
+
+		PX_FORCE_INLINE PxU32 getRefCount()	const
+		{
+			return mBuiltInRefCount;
+		}
+	};
+
+	PX_FORCE_INLINE void RefCountable_preExportDataReset(PxRefCounted& base)	{ static_cast<RefCountableExt&>(base).preExportDataReset();			}
+	PX_FORCE_INLINE void RefCountable_incRefCount(PxRefCounted& base)			{ static_cast<RefCountableExt&>(base).incRefCount();				}
+	PX_FORCE_INLINE void RefCountable_decRefCount(PxRefCounted& base)			{ static_cast<RefCountableExt&>(base).decRefCount();				}
+	PX_FORCE_INLINE PxU32 RefCountable_getRefCount(const PxRefCounted& base)	{ return static_cast<const RefCountableExt&>(base).getRefCount();	}
+
+	// simple thread-safe reference count
+	// when the ref count is zero, the object is in an undefined state (pending delete)
+
+	class RefCountable
+	{
+	public:
+// PX_SERIALIZATION
+		RefCountable(const PxEMPTY) { PX_ASSERT(mRefCount == 1); }
+				void	preExportDataReset() { mRefCount = 1; }
+//~PX_SERIALIZATION
+		explicit RefCountable(PxU32 initialCount = 1)
+			: mRefCount(PxI32(initialCount))
+		{
+			PX_ASSERT(mRefCount!=0);
+		}
+
+		virtual ~RefCountable() {}
+
+		/**
+		Calls 'delete this;'. It needs to be overloaded for classes also deriving from 
+		PxBase and call 'Cm::deletePxBase(this);' instead.
+		*/
+		virtual	void onRefCountZero()
+		{
+			PX_DELETE_THIS;
+		}
+
+		void incRefCount()
+		{
+			physx::PxAtomicIncrement(&mRefCount);
+			// value better be greater than 1, or we've created a ref to an undefined object
+			PX_ASSERT(mRefCount>1);
+		}
+
+		void decRefCount()
+		{
+			PX_ASSERT(mRefCount>0);
+			if(physx::PxAtomicDecrement(&mRefCount) == 0)
+				onRefCountZero();
+		}
+
+		PX_FORCE_INLINE PxU32 getRefCount() const
+		{
+			return PxU32(mRefCount);
+		}
+	private:
+		volatile PxI32 mRefCount;
+	};
+
+
+} // namespace Cm
+
+}
+
+#endif