text: 
  /*
   * Copyright (C) Igor Sysoev
   * Copyright (C) Nginx, Inc.
   */
  
  
  #ifndef _NGX_SLAB_H_INCLUDED_
  #define _NGX_SLAB_H_INCLUDED_
  
  
  #include <ngx_config.h>
  #include <ngx_core.h>
  
  
  typedef struct ngx_slab_page_s  ngx_slab_page_t;
  
  struct ngx_slab_page_s {
      uintptr_t         slab;
      ngx_slab_page_t  *next;
      uintptr_t         prev;
  };
  
  
  typedef struct {
      ngx_uint_t        total;
      ngx_uint_t        used;
  
      ngx_uint_t        reqs;
      ngx_uint_t        fails;
  } ngx_slab_stat_t;
  
  
  typedef struct {
      ngx_shmtx_sh_t    lock;
  
      size_t            min_size;
      size_t            min_shift;
  
      ngx_slab_page_t  *pages;
      ngx_slab_page_t  *last;
      ngx_slab_page_t   free;
  
      ngx_slab_stat_t  *stats;
      ngx_uint_t        pfree;
  
      u_char           *start;
      u_char           *end;
  
      ngx_shmtx_t       mutex;
  
      u_char           *log_ctx;
      u_char            zero;
  
      unsigned          log_nomem:1;
  
      void             *data;
      void             *addr;
  } ngx_slab_pool_t;
  
  
  void ngx_slab_sizes_init(void);
  void ngx_slab_init(ngx_slab_pool_t *pool);
  void *ngx_slab_alloc(ngx_slab_pool_t *pool, size_t size);
  void *ngx_slab_alloc_locked(ngx_slab_pool_t *pool, size_t size);
  void *ngx_slab_calloc(ngx_slab_pool_t *pool, size_t size);
  void *ngx_slab_calloc_locked(ngx_slab_pool_t *pool, size_t size);
  void ngx_slab_free(ngx_slab_pool_t *pool, void *p);
  void ngx_slab_free_locked(ngx_slab_pool_t *pool, void *p);
  
  
  #endif /* _NGX_SLAB_H_INCLUDED_ */
  