DataChunker Class Reference #include <dataChunker.h> Inheritance diagram for DataChunker: [legend]List of all members. Detailed Description Implements a chunked data allocator. Calling new/malloc all the time is a time consuming operation. Therefore, we provide the DataChunker, which allocates memory in blocks of chunkSize (by default 16k, see ChunkSize, though it can be set in the constructor), then doles it out as requested, in chunks of up to chunkSize in size. It will assert if you try to get more than ChunkSize bytes at a time, and it deals with the logic of allocating new blocks and giving out word-aligned chunks. Note that new/free/realloc WILL NOT WORK on memory gotten from the DataChunker. This also only grows (you can call freeBlocks to deallocate and reset things). Public Types   ChunkSize = 16376   Default size of each DataBlock page in the DataChunker. enum   { ChunkSize = 16376 } Public Member Functions void *  alloc (S32 size)   Return a pointer to a chunk of memory from a pre-allocated block. void  freeBlocks (bool keepOne=false)   Free all allocated memory blocks.   DataChunker (S32 size=ChunkSize)   Initialize using blocks of a given size.   ~DataChunker () void  swap (DataChunker &d)   Swaps the memory allocated in one data chunker for another. Private Attributes DataBlock *  mCurBlock   current page we're allocating data from. S32  mChunkSize   The size allocated for each page in the DataChunker. Classes struct   DataBlock   Block of allocated memory. More... Member Enumeration Documentation anonymous enum Enumerator: ChunkSize  Default size of each DataBlock page in the DataChunker. Constructor & Destructor Documentation DataChunker::DataChunker ( S32  size = ChunkSize  )  Initialize using blocks of a given size. One new block is allocated at constructor-time. Parameters: size  Size in bytes of the space to allocate for each block. DataChunker::~DataChunker (  )  Member Function Documentation void* DataChunker::alloc ( S32  size  )  Return a pointer to a chunk of memory from a pre-allocated block. This memory goes away when you call freeBlocks. This memory is word-aligned. Parameters: size  Size of chunk to return. This must be less than chunkSize or else an assertion will occur. void DataChunker::freeBlocks ( bool  keepOne = false  )  Free all allocated memory blocks. This invalidates all pointers returned from alloc(). void DataChunker::swap ( DataChunker &  d  )  [inline] Swaps the memory allocated in one data chunker for another. This can be used to implement packing of memory stored in a DataChunker. Member Data Documentation DataBlock* DataChunker::mCurBlock [private] current page we're allocating data from. If the data size request is greater than the memory space currently available in the current page, a new page will be allocated. S32 DataChunker::mChunkSize [private] The size allocated for each page in the DataChunker.

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