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src/core/ngx_palloc.h - nginx-1.7.10

Data types defined

Macros defined

Source code


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


  8. #ifndef _NGX_PALLOC_H_INCLUDED_
  9. ‌#define _NGX_PALLOC_H_INCLUDED_


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


  16. /*
  17. * NGX_MAX_ALLOC_FROM_POOL should be (ngx_pagesize - 1), i.e. 4095 on x86.
  18. * On Windows NT it decreases a number of locked pages in a kernel.
  19. */
  20. ‌#define NGX_MAX_ALLOC_FROM_POOL  (ngx_pagesize - 1)

  22. ‌#define NGX_DEFAULT_POOL_SIZE    (16 * 1024)

  24. ‌#define NGX_POOL_ALIGNMENT       16
  25. ‌#define NGX_MIN_POOL_SIZE                                                     \
  26.     ngx_align((sizeof(ngx_pool_t) + 2 * sizeof(ngx_pool_large_t)),            \
  27.               NGX_POOL_ALIGNMENT)


  30. ‌typedef void (*ngx_pool_cleanup_pt)(void *data);

  32. ‌typedef struct ngx_pool_cleanup_s  ngx_pool_cleanup_t;

  34. ‌struct ngx_pool_cleanup_s {
  35.     ngx_pool_cleanup_pt   handler;
  36.     void                 *data;
  37.     ngx_pool_cleanup_t   *next;
  38. };


  41. ‌typedef struct ngx_pool_large_s  ngx_pool_large_t;

  43. ‌struct ngx_pool_large_s {
  44.     ngx_pool_large_t     *next;
  45.     void                 *alloc;
  46. };


  49. typedef struct {
  50.     u_char               *last;
  51.     u_char               *end;
  52.     ngx_pool_t           *next;
  53.     ngx_uint_t            failed;
  54. ‌} ngx_pool_data_t;


  57. ‌struct ngx_pool_s {
  58.     ngx_pool_data_t       d;
  59.     size_t                max;
  60.     ngx_pool_t           *current;
  61.     ngx_chain_t          *chain;
  62.     ngx_pool_large_t     *large;
  63.     ngx_pool_cleanup_t   *cleanup;
  64.     ngx_log_t            *log;
  65. };


  68. typedef struct {
  69.     ngx_fd_t              fd;
  70.     u_char               *name;
  71.     ngx_log_t            *log;
  72. ‌} ngx_pool_cleanup_file_t;


  75. void *ngx_alloc(size_t size, ngx_log_t *log);
  76. void *ngx_calloc(size_t size, ngx_log_t *log);

  78. ngx_pool_t *ngx_create_pool(size_t size, ngx_log_t *log);
  79. void ngx_destroy_pool(ngx_pool_t *pool);
  80. void ngx_reset_pool(ngx_pool_t *pool);

  82. void *ngx_palloc(ngx_pool_t *pool, size_t size);
  83. void *ngx_pnalloc(ngx_pool_t *pool, size_t size);
  84. void *ngx_pcalloc(ngx_pool_t *pool, size_t size);
  85. void *ngx_pmemalign(ngx_pool_t *pool, size_t size, size_t alignment);
  86. ngx_int_t ngx_pfree(ngx_pool_t *pool, void *p);


  89. ngx_pool_cleanup_t *ngx_pool_cleanup_add(ngx_pool_t *p, size_t size);
  90. void ngx_pool_run_cleanup_file(ngx_pool_t *p, ngx_fd_t fd);
  91. void ngx_pool_cleanup_file(void *data);
  92. void ngx_pool_delete_file(void *data);


  95. #endif /* _NGX_PALLOC_H_INCLUDED_ */

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