arena.h

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#pragma once
#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

// TYPES

typedef struct sys_mem_arena_t sys_mem_arena_t;

typedef struct sys_mem_stats_t {
  size_t size_bytes;  
  size_t used_bytes;  
  size_t allocations; 
} sys_mem_stats_t;

// LIFECYCLE

sys_mem_arena_t *sys_mem_arena_init(size_t size, sys_mem_arena_t *prev,
                                    void *(*malloc_fn)(size_t size),
                                    void (*free_fn)(void *ptr));

void sys_mem_arena_delete(sys_mem_arena_t *arena);

sys_mem_arena_t *sys_mem_arena_next(sys_mem_arena_t *arena,
                                    sys_mem_stats_t *stats);

// PUBLIC METHODS

void *sys_mem_arena_alloc(sys_mem_arena_t *arena, size_t size);

void *sys_mem_arena_realloc(sys_mem_arena_t *arena, void *ptr, size_t size);

void sys_mem_arena_free(sys_mem_arena_t *arena, void *ptr);


#ifdef __cplusplus
}
#endif