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Remove unused things in block_cache.h

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This commit is contained in:
Thomas Goyne 2014-07-16 11:58:27 -07:00
parent e2a11f2d90
commit 24b8db522a
1 changed files with 1 additions and 62 deletions
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63
src/block_cache.h
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@ -37,55 +37,12 @@
#include <list>
#include <vector>
/// @class BasicDataBlockFactory
/// @brief Simple factory for allocating blocks for DataBlockCache
/// @tparam BlockT Type of blocks to produce
///
/// This is the default block factory class used by DataBlockCache if another isn't specified.
/// It allocates blocks on the heap using operator new and the default constructor, and does
/// nothing special to initialise the blocks.
///
/// Custom block factories could use a large internally pre-allocated buffer to create the
/// requested blocks in to avoid the default allocator.
template <typename BlockT>
struct BasicDataBlockFactory {
typedef std::unique_ptr<BlockT> BlockType;
/// @brief Allocates a block and returns it
/// @param i Index of the block to allocate
/// @return A pointer to the allocated block
///
/// This default implementation does not use the i parameter. Custom implementations
/// of block factories should use i to determine what data to fill into the block.
std::unique_ptr<BlockT> ProduceBlock(size_t i)
{
(void)i;
return std::unique_ptr<BlockT>(new BlockT);
}
/// @brief Retrieve the amount of memory consumed by a single block
/// @return Number of bytes consumed by a block
///
/// All blocks must consume the same amount of memory. The size of a block
/// is used to manage and limit the size of the cache.
size_t GetBlockSize() const
{
return sizeof(BlockT);
}
};
/// @class DataBlockCache
/// @brief Cache for blocks of data in a stream or similar
/// @tparam BlockT Type of blocks to store
/// @tparam MacroblockExponent Controls the number of blocks per macroblock, for tuning memory usage
/// @tparam BlockFactoryT Type of block factory, see BasicDataBlockFactory class for detail on these
template <
typename BlockT,
int MacroblockExponent = 6,
typename BlockFactoryT = BasicDataBlockFactory<BlockT>
>
template <typename BlockT, int MacroblockExponent, typename BlockFactoryT>
class DataBlockCache {
/// Type of an array of blocks
typedef std::vector<typename BlockFactoryT::BlockType> BlockArray;
@ -260,22 +217,4 @@ public:
return b;
}
/// @brief Speculatively add blocks not present to the cache
/// @param forward Assume forwards linear access is plausible
/// @param backward Assume backwards linear access is plausible
/// @return Number of blocks added to the cache
///
/// Assuming forwards and/or backwards linear access causes the macroblock access data to be
/// used for speculating in macroblocks that may be accessed soon, and also allocate block
/// in macroblocks that may otherwise not have been accessed recently.
///
/// @todo Implement this.
size_t Speculate(bool forward, bool backward)
{
(void)forward;
(void)backward;
return 0;
}
};