release/src/router/nginx/src/core/ngx_slab.h

   1
   2 /*
   3  * Copyright (C) Igor Sysoev
   4  * Copyright (C) Nginx, Inc.
   5  */
   6
   7
   8 #ifndef _NGX_SLAB_H_INCLUDED_
   9 #define _NGX_SLAB_H_INCLUDED_
  10
  11
  12 #include <ngx_config.h>
  13 #include <ngx_core.h>
  14
  15
  16 typedef struct ngx_slab_page_s  ngx_slab_page_t;
  17
  18 struct ngx_slab_page_s {
  19     uintptr_t         slab;
  20     ngx_slab_page_t  *next;
  21     uintptr_t         prev;
  22 };
  23
  24
  25 typedef struct {
  26     ngx_shmtx_sh_t    lock;
  27
  28     size_t            min_size;
  29     size_t            min_shift;
  30
  31     ngx_slab_page_t  *pages;
  32     ngx_slab_page_t   free;
  33
  34     u_char           *start;
  35     u_char           *end;
  36
  37     ngx_shmtx_t       mutex;
  38
  39     u_char           *log_ctx;
  40     u_char            zero;
  41
  42     void             *data;
  43     void             *addr;
  44 } ngx_slab_pool_t;
  45
  46
  47 void ngx_slab_init(ngx_slab_pool_t *pool);
  48 void *ngx_slab_alloc(ngx_slab_pool_t *pool, size_t size);
  49 void *ngx_slab_alloc_locked(ngx_slab_pool_t *pool, size_t size);
  50 void ngx_slab_free(ngx_slab_pool_t *pool, void *p);
  51 void ngx_slab_free_locked(ngx_slab_pool_t *pool, void *p);
  52
  53
  54 #endif /* _NGX_SLAB_H_INCLUDED_ */