allocator.h

// Copyright Maciej Sobczak 2008-2022.
// This file is part of YAMI4.
// See the package-level LICENSE.txt file.
 
#ifndef YAMICORE_ALLOCATOR_H_INCLUDED
#define YAMICORE_ALLOCATOR_H_INCLUDED
 
#include "dll.h"
 
#include <cstddef>
 
namespace yami
{
    
namespace core
{
 
class DLL allocator
{
public:
    virtual void * allocate(std::size_t requested_size) = 0;
 
    virtual void deallocate(const void * p) = 0;
};
 
class DLL standard_allocator : public allocator
{
public:
    virtual void * allocate(std::size_t requested_size);
 
    virtual void deallocate(const void * p);
};
 
class DLL non_locked_allocator : public allocator
{
public:
    non_locked_allocator();
 
    void set_working_area(void * buf, std::size_t size);
 
    virtual void * allocate(std::size_t requested_size);
 
    virtual void deallocate(const void * p);
 
    void get_free_size(std::size_t & biggest, std::size_t & all) const;
 
private:
    non_locked_allocator(const non_locked_allocator &);
    void operator=(const non_locked_allocator &);
 
    void * base_;
    std::size_t size_;
 
    void * first_free_segment_;
};
 
} // namespace core
 
} // namespace yami
 
#endif // YAMICORE_ALLOCATOR_H_INCLUDED