34 lines
1.1 KiB
C++
34 lines
1.1 KiB
C++
#ifndef THOR_CACHE_H
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#define THOR_CACHE_H
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#include "blockdev.h"
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/**
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* Handles events associated with a cache pulling blocks in and out of memory.
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*/
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class BlockHandler {
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FORBID_COPY(BlockHandler);
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public:
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BlockHandler() {}
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virtual ~BlockHandler() {}
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/** Save state. */
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virtual void Serialize(ArrayList<char>* data) const = 0;
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/** Initialize from state. */
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virtual void Deserialize(const ArrayList<char>& data) = 0;
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/** Initialize a chunk in frozen state. */
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virtual void BlockInitFrozen(BlockDevice::blockid_t blockid,
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BlockDevice::offset_t begin,
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BlockDevice::offset_t bytes, char *block) = 0;
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/** Freeze a chunk so it can be sent over net, or stored. */
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virtual void BlockFreeze(BlockDevice::blockid_t blockid,
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BlockDevice::offset_t begin, BlockDevice::offset_t bytes,
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const char *old_location, char *block) = 0;
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/** Thaw a chunk so it can be accessed via pointers. */
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virtual void BlockThaw(BlockDevice::blockid_t blockid,
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BlockDevice::offset_t begin, BlockDevice::offset_t bytes,
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char *block) = 0;
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};
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#endif
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