ra8_slab.h

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#pragma once
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <stdint.h>
 
#include "ra8_err.h"

typedef enum : uint32_t {
  k_ra8_slab_nil            = 0xFFFFFFFFU, 
  k_ra8_slab_min_cell_bytes = 4U,          
  k_ra8_slab_align_bytes    = 4U,          
} ra8_slab_const_t;

typedef struct {
  uint8_t* base;       
  uint32_t cell_bytes; 
  uint32_t cell_count; 
  uint32_t free_head;  
  uint32_t free_count; 
} ra8_slab_t;

[[nodiscard]] ra8_err_t
ra8_slab_init(ra8_slab_t* slab, void* buffer, uint32_t buffer_bytes, uint32_t cell_bytes);

[[nodiscard]] ra8_err_t ra8_slab_alloc(ra8_slab_t* slab, void** out_cell);

[[nodiscard]] ra8_err_t ra8_slab_free(ra8_slab_t* slab, void* cell);

[[nodiscard]] ra8_err_t
ra8_slab_stats(const ra8_slab_t* slab, uint32_t* out_free, uint32_t* out_total);
 
#ifdef __cplusplus
}
#endif