1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #ifndef _NGX_PALLOC_H_INCLUDED_
8 #define _NGX_PALLOC_H_INCLUDED_
9
10
11 #include <ngx_config.h>
12 #include <ngx_core.h>
13
14
15 /*
16 * NGX_MAX_ALLOC_FROM_POOL should be (ngx_pagesize - 1), i.e. 4095 on x86.
17 * On Windows NT it decreases a number of locked pages in a kernel.
18 */
19 #define NGX_MAX_ALLOC_FROM_POOL (ngx_pagesize - 1)
20
21 #define NGX_DEFAULT_POOL_SIZE (16 * 1024)
22 #define NGX_MIN_POOL_SIZE \
23 (sizeof(ngx_pool_t) + 2 * sizeof(ngx_pool_large_t))
24
25
26 typedef void (*ngx_pool_cleanup_pt)(void *data);
27
28 typedef struct ngx_pool_cleanup_s ngx_pool_cleanup_t;
29
30 struct ngx_pool_cleanup_s {
31 ngx_pool_cleanup_pt handler;
32 void *data;
33 ngx_pool_cleanup_t *next;
34 };
35
36
37 typedef struct ngx_pool_large_s ngx_pool_large_t;
38
39 struct ngx_pool_large_s {
40 ngx_pool_large_t *next;
41 void *alloc;
42 };
43
44
45 typedef struct {
46 u_char *last;
47 u_char *end;
48 ngx_pool_t *next;
49 ngx_uint_t failed;
50 } ngx_pool_data_t;
51
52
53 struct ngx_pool_s {
54 ngx_pool_data_t d;
55 size_t max;
56 ngx_pool_t *current;
57 ngx_chain_t *chain;
58 ngx_pool_large_t *large;
59 ngx_pool_cleanup_t *cleanup;
60 ngx_log_t *log;
61 };
62
63
64 typedef struct {
65 ngx_fd_t fd;
66 u_char *name;
67 ngx_log_t *log;
68 } ngx_pool_cleanup_file_t;
69
70
71 void *ngx_alloc(size_t size, ngx_log_t *log);
72 void *ngx_calloc(size_t size, ngx_log_t *log);
73
74 ngx_pool_t *ngx_create_pool(size_t size, ngx_log_t *log);
75 void ngx_destroy_pool(ngx_pool_t *pool);
76 void ngx_reset_pool(ngx_pool_t *pool);
77
78 void *ngx_palloc(ngx_pool_t *pool, size_t size);
79 void *ngx_pnalloc(ngx_pool_t *pool, size_t size);
80 void *ngx_pcalloc(ngx_pool_t *pool, size_t size);
81 void *ngx_pmemalign(ngx_pool_t *pool, size_t size, size_t alignment);
82 ngx_int_t ngx_pfree(ngx_pool_t *pool, void *p);
83
84
85 ngx_pool_cleanup_t *ngx_pool_cleanup_add(ngx_pool_t *p, size_t size);
86 void ngx_pool_run_cleanup_file(ngx_pool_t *p, ngx_fd_t fd);
87 void ngx_pool_cleanup_file(void *data);
88 void ngx_pool_delete_file(void *data);
89
90
91 #endif /* _NGX_PALLOC_H_INCLUDED_ */
92
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