cache.hpp

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#ifndef __JOIN_CACHE_HPP__
#define __JOIN_CACHE_HPP__
 
// libjoin.
#include <join/mutex.hpp>
 
// C++.
#include <string>
#include <memory>
#include <map>
 
// C.
#include <sys/stat.h>
 
namespace join
{
    class Cache
    {
    public:
        Cache () = default;
 
        Cache (const Cache& other) = delete;
 
        Cache& operator= (const Cache& other) = delete;
 
        Cache (Cache&& other) = delete;
 
        Cache& operator= (Cache&& other) = delete;
 
        ~Cache ();
 
        void* get (const std::string &fileName, struct stat &sbuf);
 
        void remove (const std::string &fileName);
 
        void clear ();
 
        size_t size ();
 
    protected:
        struct CacheEntry
        {
            off_t size;                 
            struct timespec modifTime;  
            void *addr;                 
        };
 
        std::map <std::string, std::unique_ptr <CacheEntry>> _entries;
 
        Mutex _mutex;
    };
}
 
#endif