slab.h

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#pragma once
 
#include "sys/list_head.h"
#include "stddef.h"
#include "mem/gfp.h"
 
typedef unsigned int slab_flags_t;
 
typedef void (*kmem_fun_t)(void *);
 
#define KMEM_CREATE(objtype) \
    kmem_cache_create(#objtype, sizeof(objtype), alignof(objtype), GFP_KERNEL, NULL, NULL)
 
#define KMEM_CREATE_CTOR(objtype, ctor) \
    kmem_cache_create(#objtype, sizeof(objtype), alignof(objtype), GFP_KERNEL, (kmem_fun_t)(ctor), NULL)
 
typedef struct kmem_cache_t {
    list_head cache_list;
    const char *name;
    unsigned int size;
    unsigned int object_size;
    unsigned int align;
    unsigned int total_num;
    unsigned int free_num;
    slab_flags_t flags;
    unsigned int gfp_order;
    kmem_fun_t ctor;
    kmem_fun_t dtor;
    list_head slabs_full;
    list_head slabs_partial;
    list_head slabs_free;
} kmem_cache_t;
 
int kmem_cache_init(void);
 
kmem_cache_t *kmem_cache_create(
    const char *name,
    unsigned int size,
    unsigned int align,
    slab_flags_t flags,
    kmem_fun_t ctor,
    kmem_fun_t dtor);
 
int kmem_cache_destroy(kmem_cache_t *cachep);
 
#ifdef ENABLE_CACHE_TRACE
 
void *pr_kmem_cache_alloc(const char *file, const char *fun, int line, kmem_cache_t *cachep, gfp_t flags);
 
void pr_kmem_cache_free(const char *file, const char *fun, int line, void *addr);
 
#define kmem_cache_alloc(...) pr_kmem_cache_alloc(__FILE__, __func__, __LINE__, __VA_ARGS__)
 
#define kmem_cache_free(...) pr_kmem_cache_free(__FILE__, __func__, __LINE__, __VA_ARGS__)
 
#else
 
void *kmem_cache_alloc(kmem_cache_t *cachep, gfp_t flags);
 
void kmem_cache_free(void *addr);
 
#endif
 
#ifdef ENABLE_ALLOC_TRACE
 
void *pr_kmalloc(const char *file, const char *fun, int line, unsigned int size);
 
void pr_kfree(const char *file, const char *fun, int line, void *addr);
 
#define kmalloc(...) pr_kmalloc(__FILE__, __func__, __LINE__, __VA_ARGS__)
 
#define kfree(...) pr_kfree(__FILE__, __func__, __LINE__, __VA_ARGS__)
 
#else
 
void *kmalloc(unsigned int size);
 
void kfree(void *ptr);
 
#endif