hkFreeListMemoryServer.h
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上传日期:2020-08-09
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其他游戏
开发平台:
Visual C++
- /*
- *
- * Confidential Information of Telekinesys Research Limited (t/a Havok). Not for disclosure or distribution without Havok's
- * prior written consent. This software contains code, techniques and know-how which is confidential and proprietary to Havok.
- * Level 2 and Level 3 source code contains trade secrets of Havok. Havok Software (C) Copyright 1999-2009 Telekinesys Research Limited t/a Havok. All Rights Reserved. Use of this software is subject to the terms of an end user license agreement.
- *
- */
- #ifndef HK_FREE_LIST_MEMORY_SERVER_H
- #define HK_FREE_LIST_MEMORY_SERVER_H
- // Defines the interface that the hkFreeList uses to access underlying memory
- // The hkLargeBlockAllocator implements this interface
- class hkFreeListMemoryServer
- {
- public:
- virtual ~hkFreeListMemoryServer() {}
- /// Allocate some memory
- virtual void* alloc(hk_size_t size) = 0;
- /// Free some memory
- virtual void free(void* data)=0;
- /// Returns true if this appears to be a valid allocation.
- /// Does some fairly comprehesive tests, so will be slow in general.
- virtual hkBool isValidAlloc(void* data) = 0;
- /// Returns the total amount of memory available in an allocated block
- /// This extra memory can be used if needs be. The value returned will always be greater
- /// than or equal to the size passed in. The size is the size that the client believes the block
- /// to be. It must be either the size requested when the block was allocated, or a size returned
- /// by this method, otherwise the result is undefined.
- ///
- /// NOTE an implementation that does not implement this functionality - can always just return the
- /// size passed in.
- virtual hk_size_t getAllocSize(void* p,hk_size_t size) = 0;
- /// Returns the total amount of bytes taken up by an allocation
- /// The size passed in is the size of the block - it can be either the size passed in the original
- /// allocation or the size returned from getAllocSize.
- virtual hk_size_t getAllocTotalSize(void* p,hk_size_t size) = 0;
- /// Allocate memory, if can't find memory internally will fallback to the servers critical memory system
- /// Memory must be freed in the opposite order to allocation. Allocations should only be used for the
- /// shortest possible time, as the underlying memory may have severe restrictions
- virtual void* criticalAlloc(hk_size_t size) = 0;
- /// To free a critical memory allocation
- virtual void criticalFree(void* ptr,hk_size_t size) = 0;
- };
- /// Implementation of the hkFreeListAllocator interface that just uses the hkThreadMemory for its
- /// implementation. Allows you to use freelists as a fast memory allocation system separately from the
- /// the hkFreeListMemory system.
- ///
- /// Performance improvements come from not having to lookup the appropriate freelist from the size of
- /// an allocation as, well as not having to have the freelist allocate from inside of a critical section
- /// as is the case inside of the hkFreeListMemory implementation
- class hkDefaultFreeListMemoryServer: public hkReferencedObject, public hkSingleton<hkDefaultFreeListMemoryServer>,public hkFreeListMemoryServer
- {
- public:
- HK_DECLARE_SYSTEM_ALLOCATOR();
- hkDefaultFreeListMemoryServer(HK_MEMORY_CLASS cls = HK_MEMORY_CLASS_ROOT)
- : m_memoryClass(cls)
- {
- }
- /// implementing hkFreeListMemoryServer
- virtual void* alloc(hk_size_t size);
- virtual void free(void* data);
- virtual hkBool isValidAlloc(void* data) { return true; }
- virtual hk_size_t getAllocSize(void* p,hk_size_t size) { return size; }
- virtual hk_size_t getAllocTotalSize(void* p, hk_size_t size) { return size; }
- virtual void* criticalAlloc(hk_size_t size) { return alloc(size); }
- virtual void criticalFree(void* ptr,hk_size_t size) { free(ptr); }
- HK_MEMORY_CLASS m_memoryClass;
- };
- #endif // HK_FREE_LIST_MEMORY_SERVER_H
- /*
- * Havok SDK - NO SOURCE PC DOWNLOAD, BUILD(#20090216)
- *
- * Confidential Information of Havok. (C) Copyright 1999-2009
- * Telekinesys Research Limited t/a Havok. All Rights Reserved. The Havok
- * Logo, and the Havok buzzsaw logo are trademarks of Havok. Title, ownership
- * rights, and intellectual property rights in the Havok software remain in
- * Havok and/or its suppliers.
- *
- * Use of this software for evaluation purposes is subject to and indicates
- * acceptance of the End User licence Agreement for this product. A copy of
- * the license is included with this software and is also available at www.havok.com/tryhavok.
- *
- */