nginx/src/core/ngx_slab.h

   1
   2 /*
   3  * Copyright (C) Igor Sysoev
   4  */
   5
   6
   7 #ifndef _NGX_SLAB_H_INCLUDED_
   8 #define _NGX_SLAB_H_INCLUDED_
   9
  10
  11 #include <ngx_config.h>
  12 #include <ngx_core.h>
  13
  14
  15 typedef struct ngx_slab_page_s  ngx_slab_page_t;
  16
  17 struct ngx_slab_page_s {
  18     uintptr_t         slab;
  19     ngx_slab_page_t  *next;
  20     uintptr_t         prev;
  21 };
  22
  23
  24 typedef struct {
  25     ngx_atomic_t      lock;
  26
  27     size_t            min_size;
  28     size_t            min_shift;
  29
  30     ngx_slab_page_t  *pages;
  31     ngx_slab_page_t   free;
  32
  33     u_char           *start;
  34     u_char           *end;
  35
  36     ngx_shmtx_t       mutex;
  37 } ngx_slab_pool_t;
  38
  39
  40 void ngx_slab_init(ngx_slab_pool_t *pool);
  41 void *ngx_slab_alloc(ngx_slab_pool_t *pool, size_t size);
  42 void *ngx_slab_alloc_locked(ngx_slab_pool_t *pool, size_t size);
  43 void ngx_slab_free(ngx_slab_pool_t *pool, void *p);
  44 void ngx_slab_free_locked(ngx_slab_pool_t *pool, void *p);
  45
  46
  47 #endif /* _NGX_SLAB_H_INCLUDED_ */