libcryfs/implementations/caching/CacheEntry.h

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#pragma once
#ifndef MESSMER_BLOCKSTORE_IMPLEMENTATIONS_CACHING_CACHEENTRY_H_
#define MESSMER_BLOCKSTORE_IMPLEMENTATIONS_CACHING_CACHEENTRY_H_
#include <ctime>
#include <memory>
#include <messmer/cpp-utils/macros.h>
#include <boost/date_time/posix_time/posix_time_types.hpp>
namespace blockstore {
class Block;
namespace caching {
class CacheEntry {
public:
CacheEntry(std::unique_ptr<Block> block): _lastAccess(currentTime()), _block(std::move(block)) {
}
CacheEntry(CacheEntry &&) = default;
double ageSeconds() const {
return ((double)(currentTime() - _lastAccess).total_nanoseconds()) / ((double)1000000000);
}
std::unique_ptr<Block> releaseBlock() {
return std::move(_block);
}
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void setNextEntry(const CacheEntry *entry) {
_nextEntry = entry;
}
const CacheEntry *nextEntry() {
return _nextEntry;
}
private:
boost::posix_time::ptime _lastAccess;
std::unique_ptr<Block> _block;
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const CacheEntry *_nextEntry;
static boost::posix_time::ptime currentTime() {
return boost::posix_time::microsec_clock::local_time();
}
DISALLOW_COPY_AND_ASSIGN(CacheEntry);
};
}
}
#endif