StoreStats.h

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/*
 * Copyright (C) 1996-2019 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */

#ifndef SQUID_STORE_STATS_H
#define SQUID_STORE_STATS_H

class StoreInfoStats
{
public:
    class Part
    {
    public:
        double size = 0.0; 
        double count = 0.0; 
        double capacity = 0.0; 

        double meanObjectSize() const { return count > 0 ? size/count : 0.0; }

        double available() const { return capacity - size; }
    };

    class Swap: public Part
    {
    public:
        double open_disk_fd = 0.0; 
    };

    class Mem: public Part
    {
    public:
        bool shared = false; 
    };

    StoreInfoStats &operator +=(const StoreInfoStats &stats);

    Swap swap; 
    Mem mem; 

    /* stats that could be shared by memory and disk storage */
    double store_entry_count = 0.0; 
    double mem_object_count = 0.0; 
};

// TODO: this should be adjusted for use in StoreIoActionData, DiskdActionData
class StoreIoStats
{
public:
    StoreIoStats();

    struct {
        int calls;
        int select_fail;
        int create_fail;
        int success;
    } create; 
};

#endif /* SQUID_STORE_STATS_H */