RigidBody Implementation

Includes/box2d/b2_api.h

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+// MIT License
+
+// Copyright (c) 2019 Erin Catto
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+#ifndef B2_API_H
+#define B2_API_H
+
+#ifdef B2_SHARED
+  #if defined _WIN32 || defined __CYGWIN__
+    #ifdef box2d_EXPORTS
+      #ifdef __GNUC__
+        #define B2_API __attribute__ ((dllexport))
+      #else
+        #define B2_API __declspec(dllexport)
+      #endif
+    #else
+      #ifdef __GNUC__
+        #define B2_API __attribute__ ((dllimport))
+      #else
+        #define B2_API __declspec(dllimport)
+      #endif
+    #endif
+  #else
+    #if __GNUC__ >= 4
+      #define B2_API __attribute__ ((visibility ("default")))
+    #else
+      #define B2_API
+    #endif
+  #endif
+#else
+  #define B2_API
+#endif
+
+#endif

Includes/box2d/b2_block_allocator.h

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+// MIT License
+
+// Copyright (c) 2019 Erin Catto
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+#ifndef B2_BLOCK_ALLOCATOR_H
+#define B2_BLOCK_ALLOCATOR_H
+
+#include "b2_api.h"
+#include "b2_settings.h"
+
+const int32 b2_blockSizeCount = 14;
+
+struct b2Block;
+struct b2Chunk;
+
+/// This is a small object allocator used for allocating small
+/// objects that persist for more than one time step.
+/// See: http://www.codeproject.com/useritems/Small_Block_Allocator.asp
+class B2_API b2BlockAllocator
+{
+public:
+	b2BlockAllocator();
+	~b2BlockAllocator();
+
+	/// Allocate memory. This will use b2Alloc if the size is larger than b2_maxBlockSize.
+	void* Allocate(int32 size);
+
+	/// Free memory. This will use b2Free if the size is larger than b2_maxBlockSize.
+	void Free(void* p, int32 size);
+
+	void Clear();
+
+private:
+
+	b2Chunk* m_chunks;
+	int32 m_chunkCount;
+	int32 m_chunkSpace;
+
+	b2Block* m_freeLists[b2_blockSizeCount];
+};
+
+#endif