feat(physics): wire physx sdk into build

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

@@ -0,0 +1,154 @@
+// 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_FLUSH_POOL_H
+#define CM_FLUSH_POOL_H
+
+#include "foundation/PxUserAllocated.h"
+#include "foundation/PxBitUtils.h"
+#include "foundation/PxMutex.h"
+#include "foundation/PxArray.h"
+
+/*
+Pool used to allocate variable sized tasks. It's intended to be cleared after a short period (time step).
+*/
+
+namespace physx
+{
+namespace Cm
+{
+	static const PxU32 sSpareChunkCount = 2;
+
+	class FlushPool
+	{
+		PX_NOCOPY(FlushPool)
+	public:
+		FlushPool(PxU32 chunkSize) : mChunks("FlushPoolChunk"), mChunkIndex(0), mOffset(0), mChunkSize(chunkSize)
+		{
+			mChunks.pushBack(static_cast<PxU8*>(PX_ALLOC(mChunkSize, "PxU8")));
+		}
+
+		~FlushPool()
+		{
+			for (PxU32 i = 0; i < mChunks.size(); ++i)
+				PX_FREE(mChunks[i]);
+		}
+
+		// alignment must be a power of two
+		void* allocate(PxU32 size, PxU32 alignment=16)
+		{
+			PxMutex::ScopedLock lock(mMutex);
+			return allocateNotThreadSafe(size, alignment);
+		}
+
+		// alignment must be a power of two
+		void* allocateNotThreadSafe(PxU32 size, PxU32 alignment=16)
+		{
+			PX_ASSERT(PxIsPowerOfTwo(alignment));
+			PX_ASSERT(size <= mChunkSize && !mChunks.empty());
+			
+			// padding for alignment
+			size_t unalignedStart = size_t(mChunks[mChunkIndex]+mOffset);
+			PxU32 pad = PxU32(((unalignedStart+alignment-1)&~(size_t(alignment)-1)) - unalignedStart);
+
+			if (mOffset + size + pad > mChunkSize)
+			{
+				mChunkIndex++;
+				mOffset = 0;
+				if (mChunkIndex >= mChunks.size())
+					mChunks.pushBack(static_cast<PxU8*>(PX_ALLOC(mChunkSize, "PxU8")));
+
+				// update padding to ensure new alloc is aligned
+				unalignedStart = size_t(mChunks[mChunkIndex]);
+				pad = PxU32(((unalignedStart+alignment-1)&~(size_t(alignment)-1)) - unalignedStart);
+			}
+
+			void* ptr = mChunks[mChunkIndex] + mOffset + pad;
+			PX_ASSERT((size_t(ptr)&(size_t(alignment)-1)) == 0);
+			mOffset += size + pad;
+			return ptr;
+		}
+
+		void clear(PxU32 spareChunkCount = sSpareChunkCount)
+		{
+			PxMutex::ScopedLock lock(mMutex);
+			
+			clearNotThreadSafe(spareChunkCount);
+		}
+
+		void clearNotThreadSafe(PxU32 spareChunkCount = sSpareChunkCount)
+		{
+			//release memory not used previously
+			PxU32 targetSize = mChunkIndex+spareChunkCount;
+			while (mChunks.size() > targetSize)
+			{
+				PxU8* ptr = mChunks.popBack();
+				PX_FREE(ptr);
+			}
+
+			mChunkIndex = 0;
+			mOffset = 0;
+		}
+
+		void resetNotThreadSafe()
+		{
+			PxU8* firstChunk = mChunks[0];
+
+			for (PxU32 i = 1; i < mChunks.size(); ++i)
+				PX_FREE(mChunks[i]);
+
+			mChunks.clear();
+			mChunks.pushBack(firstChunk);
+			mChunkIndex = 0;
+			mOffset = 0;
+		}
+
+		void lock()
+		{
+			mMutex.lock();
+		}
+
+		void unlock()
+		{
+			mMutex.unlock();	
+		}
+
+	private:
+		PxMutex mMutex;
+		PxArray<PxU8*> mChunks;
+		PxU32 mChunkIndex;
+		PxU32 mOffset;
+		PxU32 mChunkSize;
+	};
+
+	
+} // namespace Cm
+
+}
+
+#endif