pool.h

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#ifndef __COMMON__SIMPLE_ALLOCATOR_H__
#define __COMMON__SIMPLE_ALLOCATOR_H__

class OE_FIXED_ALLOCATOR
{
private:
    struct page_header_t {
        page_header_t   *_next; /* next page header in this list */
        unsigned int     _count;    /* number of entries in this page */
    };

    void                *_free;
    void                *_first_page;
    const unsigned int   _block_size;

public:
    OE_FIXED_ALLOCATOR(int block_size)
    :_free(NULL), first_page(NULL), _block_size(block_size)
    {
    }

    ~OE_FIXED_ALLOCATOR()
    {
        while (_first_page) {
            page_header_t *next_page = _first_page->next;
            ::free(_first_page);
            _first_page = next_page;
        }
    }

    void *alloc()
    {
        if (_free) {
            _free = (void*)(*_free);
        }
    }

};

#endif

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