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// file : examples/cxx/hybrid/allocator/arena.hxx
// copyright : not copyrighted - public domain
#ifndef ARENA_HXX
#define ARENA_HXX
#include <stddef.h> // size_t
// Sample pooled memory arena. The primary goal here is to provide a
// simple, if naive, implementation. As a result, it probably shouldn't
// be used in production.
//
class arena
{
public:
arena (void* memory, size_t size);
void*
allocate (size_t);
void*
reallocate (void*, size_t);
void
free (void*);
void
print_statistics ();
private:
struct block
{
size_t cap; // block capacity
size_t size; // allocated size
block* next; // next block
size_t used; // used flag
};
block* head_; // Linked list of blocks.
// Statistics.
//
size_t alloc_count_;
size_t realloc_count_;
size_t free_count_;
size_t cur_allocated_;
size_t max_allocated_;
};
#endif // ARENA_HXX
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