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src/core/ngx_slab.h - nginx source code

Data types defined

Macros defined

Source code


  2. /*
  3. * Copyright (C) Igor Sysoev
  4. * Copyright (C) Nginx, Inc.
  5. */


  8. #ifndef _NGX_SLAB_H_INCLUDED_
  9. ‌#define _NGX_SLAB_H_INCLUDED_


  12. #include <ngx_config.h>
  13. #include <ngx_core.h>


  16. ‌typedef struct ngx_slab_page_s  ngx_slab_page_t;

  18. ‌struct ngx_slab_page_s {
  19.     uintptr_t         slab;
  20.     ngx_slab_page_t  *next;
  21.     uintptr_t         prev;
  22. };


  25. ‌typedef struct {
  26.     ngx_uint_t        total;
  27.     ngx_uint_t        used;

  29.     ngx_uint_t        reqs;
  30.     ngx_uint_t        fails;
  31. ‌} ngx_slab_stat_t;


  34. ‌typedef struct {
  35.     ngx_shmtx_sh_t    lock;

  37.     size_t            min_size;
  38.     size_t            min_shift;

  40.     ngx_slab_page_t  *pages;
  41.     ngx_slab_page_t  *last;
  42.     ngx_slab_page_t   free;

  44.     ngx_slab_stat_t  *stats;
  45.     ngx_uint_t        pfree;

  47.     u_char           *start;
  48.     u_char           *end;

  50.     ngx_shmtx_t       mutex;

  52.     u_char           *log_ctx;
  53.     u_char            zero;

  55.     unsigned          log_nomem:1;

  57.     void             *data;
  58.     void             *addr;
  59. ‌} ngx_slab_pool_t;


  62. void ngx_slab_sizes_init(void);
  63. void ngx_slab_init(ngx_slab_pool_t *pool);
  64. void *ngx_slab_alloc(ngx_slab_pool_t *pool, size_t size);
  65. void *ngx_slab_alloc_locked(ngx_slab_pool_t *pool, size_t size);
  66. void *ngx_slab_calloc(ngx_slab_pool_t *pool, size_t size);
  67. void *ngx_slab_calloc_locked(ngx_slab_pool_t *pool, size_t size);
  68. void ngx_slab_free(ngx_slab_pool_t *pool, void *p);
  69. void ngx_slab_free_locked(ngx_slab_pool_t *pool, void *p);


  72. #endif /* _NGX_SLAB_H_INCLUDED_ */

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