memory_pool_dynamic_static.h

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/*  memory_pool_dynamic_static.h                                         */
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/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
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#ifndef MEMORY_POOL_DYNAMIC_STATIC_H
#define MEMORY_POOL_DYNAMIC_STATIC_H

#include "os/memory_pool_dynamic.h"
#include "typedefs.h"
#include "os/thread_safe.h"

class MemoryPoolDynamicStatic : public MemoryPoolDynamic {

    _THREAD_SAFE_CLASS_

    enum {
        MAX_CHUNKS=65536
    };


    struct Chunk {

        uint64_t lock;
        uint64_t check;
        void *mem;
        size_t size;
        const char *descr;

        Chunk() { mem=NULL; lock=0; check=0; }
    };

    Chunk chunk[MAX_CHUNKS];
    uint64_t last_check;
    int last_alloc;
    size_t total_usage;
    size_t max_usage;

    Chunk *get_chunk(ID p_id);
    const Chunk *get_chunk(ID p_id) const;
public:

    virtual ID alloc(size_t p_amount,const char* p_description);
    virtual void free(ID p_id);
    virtual Error realloc(ID p_id, size_t p_amount);
    virtual bool is_valid(ID p_id);
    virtual size_t get_size(ID p_id) const;
    virtual const char* get_description(ID p_id) const;

    virtual bool is_locked(ID p_id) const;
    virtual Error lock(ID p_id);
    virtual void * get(ID p_ID);
    virtual Error unlock(ID p_id);

    virtual size_t get_available_mem() const;
    virtual size_t get_total_usage() const;

    MemoryPoolDynamicStatic();
    virtual ~MemoryPoolDynamicStatic();

};

#endif