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 FreeBSD 5.x it allows to use the zero copy sending.
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)
21
22 #define NGX_DEFAULT_POOL_SIZE (16 * 1024)
23 #define NGX_MIN_POOL_SIZE \
24 (sizeof(ngx_pool_t) + 2 * sizeof(ngx_pool_large_t))
25
26
27 typedef void (*ngx_pool_cleanup_pt)(void *data);
28
29 typedef struct ngx_pool_cleanup_s ngx_pool_cleanup_t;
30
31 struct ngx_pool_cleanup_s {
32 ngx_pool_cleanup_pt handler;
33 void *data;
34 ngx_pool_cleanup_t *next;
35 };
36
37
38 typedef struct ngx_pool_large_s ngx_pool_large_t;
39
40 struct ngx_pool_large_s {
41 ngx_pool_large_t *next;
42 void *alloc;
43 };
44
45
46 struct ngx_pool_s {
47 u_char *last;
48 u_char *end;
49 ngx_pool_t *current;
50 ngx_chain_t *chain;
51 ngx_pool_t *next;
52 ngx_pool_large_t *large;
53 ngx_pool_cleanup_t *cleanup;
54 ngx_log_t *log;
55 };
56
57
58 typedef struct {
59 ngx_fd_t fd;
60 u_char *name;
61 ngx_log_t *log;
62 } ngx_pool_cleanup_file_t;
63
64
65 void *ngx_alloc(size_t size, ngx_log_t *log);
66 void *ngx_calloc(size_t size, ngx_log_t *log);
67
68 ngx_pool_t *ngx_create_pool(size_t size, ngx_log_t *log);
69 void ngx_destroy_pool(ngx_pool_t *pool);
70
71 void *ngx_palloc(ngx_pool_t *pool, size_t size);
72 void *ngx_pcalloc(ngx_pool_t *pool, size_t size);
73 ngx_int_t ngx_pfree(ngx_pool_t *pool, void *p);
74
75
76 ngx_pool_cleanup_t *ngx_pool_cleanup_add(ngx_pool_t *p, size_t size);
77 void ngx_pool_cleanup_file(void *data);
78 void ngx_pool_delete_file(void *data);
79
80
81 #endif /* _NGX_PALLOC_H_INCLUDED_ */
82
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