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annotate src/core/ngx_buf.h @ 7660:d33e17499088

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Version bump.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 26 May 2020 22:03:00 +0300
parents 0c572ed91b36
children 2f9214713666
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2 /*
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3 * Copyright (C) Igor Sysoev
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d620f497c50f Copyright updated.
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4 * Copyright (C) Nginx, Inc.
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5 */
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7
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8 #ifndef _NGX_BUF_H_INCLUDED_
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9 #define _NGX_BUF_H_INCLUDED_
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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16 typedef void * ngx_buf_tag_t;
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18 typedef struct ngx_buf_s ngx_buf_t;
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20 struct ngx_buf_s {
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21 u_char *pos;
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22 u_char *last;
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23 off_t file_pos;
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24 off_t file_last;
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26 u_char *start; /* start of buffer */
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27 u_char *end; /* end of buffer */
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28 ngx_buf_tag_t tag;
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29 ngx_file_t *file;
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30 ngx_buf_t *shadow;
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33 /* the buf's content could be changed */
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34 unsigned temporary:1;
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36 /*
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37 * the buf's content is in a memory cache or in a read only memory
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38 * and must not be changed
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39 */
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40 unsigned memory:1;
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42 /* the buf's content is mmap()ed and must not be changed */
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43 unsigned mmap:1;
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45 unsigned recycled:1;
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46 unsigned in_file:1;
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47 unsigned flush:1;
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9b8c906f6e63 nginx-0.1.29-RELEASE import
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48 unsigned sync:1;
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49 unsigned last_buf:1;
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50 unsigned last_in_chain:1;
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52 unsigned last_shadow:1;
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53 unsigned temp_file:1;
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54
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55 /* STUB */ int num;
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56 };
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58
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59 struct ngx_chain_s {
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60 ngx_buf_t *buf;
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61 ngx_chain_t *next;
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62 };
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65 typedef struct {
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66 ngx_int_t num;
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67 size_t size;
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68 } ngx_bufs_t;
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70
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71 typedef struct ngx_output_chain_ctx_s ngx_output_chain_ctx_t;
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72
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73 typedef ngx_int_t (*ngx_output_chain_filter_pt)(void *ctx, ngx_chain_t *in);
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74
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75 typedef void (*ngx_output_chain_aio_pt)(ngx_output_chain_ctx_t *ctx,
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76 ngx_file_t *file);
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77
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78 struct ngx_output_chain_ctx_s {
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79 ngx_buf_t *buf;
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80 ngx_chain_t *in;
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81 ngx_chain_t *free;
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82 ngx_chain_t *busy;
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83
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84 unsigned sendfile:1;
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85 unsigned directio:1;
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86 unsigned unaligned:1;
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87 unsigned need_in_memory:1;
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88 unsigned need_in_temp:1;
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89 unsigned aio:1;
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90
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91 #if (NGX_HAVE_FILE_AIO || NGX_COMPAT)
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92 ngx_output_chain_aio_pt aio_handler;
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93 #if (NGX_HAVE_AIO_SENDFILE || NGX_COMPAT)
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94 ssize_t (*aio_preload)(ngx_buf_t *file);
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95 #endif
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96 #endif
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97
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98 #if (NGX_THREADS || NGX_COMPAT)
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99 ngx_int_t (*thread_handler)(ngx_thread_task_t *task,
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100 ngx_file_t *file);
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101 ngx_thread_task_t *thread_task;
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102 #endif
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103
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104 off_t alignment;
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105
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106 ngx_pool_t *pool;
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107 ngx_int_t allocated;
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108 ngx_bufs_t bufs;
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109 ngx_buf_tag_t tag;
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110
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111 ngx_output_chain_filter_pt output_filter;
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112 void *filter_ctx;
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113 };
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diff changeset
114
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
115
162
96993d4d5067 nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 160
diff changeset
116 typedef struct {
96993d4d5067 nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 160
diff changeset
117 ngx_chain_t *out;
96993d4d5067 nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 160
diff changeset
118 ngx_chain_t **last;
96993d4d5067 nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 160
diff changeset
119 ngx_connection_t *connection;
96993d4d5067 nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 160
diff changeset
120 ngx_pool_t *pool;
362
7650aea1816f nginx-0.0.7-2004-06-21-19:59:32 import
Igor Sysoev <igor@sysoev.ru>
parents: 356
diff changeset
121 off_t limit;
166
389d7ee9fa60 nginx-0.0.1-2003-10-30-11:51:06 import
Igor Sysoev <igor@sysoev.ru>
parents: 162
diff changeset
122 } ngx_chain_writer_ctx_t;
162
96993d4d5067 nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 160
diff changeset
123
96993d4d5067 nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 160
diff changeset
124
61
4f3e2abcc2c4 nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents: 47
diff changeset
125 #define NGX_CHAIN_ERROR (ngx_chain_t *) NGX_ERROR
4f3e2abcc2c4 nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents: 47
diff changeset
126
4f3e2abcc2c4 nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents: 47
diff changeset
127
343
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents: 294
diff changeset
128 #define ngx_buf_in_memory(b) (b->temporary || b->memory || b->mmap)
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents: 294
diff changeset
129 #define ngx_buf_in_memory_only(b) (ngx_buf_in_memory(b) && !b->in_file)
595
ebc68d8ca496 nginx-0.3.19-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 581
diff changeset
130
343
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents: 294
diff changeset
131 #define ngx_buf_special(b) \
509
9b8c906f6e63 nginx-0.1.29-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 507
diff changeset
132 ((b->flush || b->last_buf || b->sync) \
9b8c906f6e63 nginx-0.1.29-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 507
diff changeset
133 && !ngx_buf_in_memory(b) && !b->in_file)
343
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents: 294
diff changeset
134
595
ebc68d8ca496 nginx-0.3.19-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 581
diff changeset
135 #define ngx_buf_sync_only(b) \
ebc68d8ca496 nginx-0.3.19-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 581
diff changeset
136 (b->sync \
ebc68d8ca496 nginx-0.3.19-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 581
diff changeset
137 && !ngx_buf_in_memory(b) && !b->in_file && !b->flush && !b->last_buf)
ebc68d8ca496 nginx-0.3.19-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 581
diff changeset
138
343
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents: 294
diff changeset
139 #define ngx_buf_size(b) \
499
64d9afb209da nginx-0.1.24-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 479
diff changeset
140 (ngx_buf_in_memory(b) ? (off_t) (b->last - b->pos): \
64d9afb209da nginx-0.1.24-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 479
diff changeset
141 (b->file_last - b->file_pos))
343
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents: 294
diff changeset
142
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents: 294
diff changeset
143 ngx_buf_t *ngx_create_temp_buf(ngx_pool_t *pool, size_t size);
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents: 294
diff changeset
144 ngx_chain_t *ngx_create_chain_of_bufs(ngx_pool_t *pool, ngx_bufs_t *bufs);
8
708f8bb772ec nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 7
diff changeset
145
343
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents: 294
diff changeset
146
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents: 294
diff changeset
147 #define ngx_alloc_buf(pool) ngx_palloc(pool, sizeof(ngx_buf_t))
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents: 294
diff changeset
148 #define ngx_calloc_buf(pool) ngx_pcalloc(pool, sizeof(ngx_buf_t))
75
869b10be682f nginx-0.0.1-2003-04-14-21:04:58 import
Igor Sysoev <igor@sysoev.ru>
parents: 74
diff changeset
149
507
cd3117ad9aab nginx-0.1.28-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
150 ngx_chain_t *ngx_alloc_chain_link(ngx_pool_t *pool);
cd3117ad9aab nginx-0.1.28-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
151 #define ngx_free_chain(pool, cl) \
cd3117ad9aab nginx-0.1.28-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
152 cl->next = pool->chain; \
cd3117ad9aab nginx-0.1.28-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
153 pool->chain = cl
cd3117ad9aab nginx-0.1.28-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 501
diff changeset
154
155
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 154
diff changeset
155
7
b5481d6fbbd4 nginx-0.0.1-2002-08-29-20:59:54 import
Igor Sysoev <igor@sysoev.ru>
parents: 6
diff changeset
156
356
2e3cbc1bbe3c nginx-0.0.7-2004-06-16-19:32:11 import
Igor Sysoev <igor@sysoev.ru>
parents: 348
diff changeset
157 ngx_int_t ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in);
479
c52408583801 nginx-0.1.14-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 473
diff changeset
158 ngx_int_t ngx_chain_writer(void *ctx, ngx_chain_t *in);
162
96993d4d5067 nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 160
diff changeset
159
356
2e3cbc1bbe3c nginx-0.0.7-2004-06-16-19:32:11 import
Igor Sysoev <igor@sysoev.ru>
parents: 348
diff changeset
160 ngx_int_t ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain,
499
64d9afb209da nginx-0.1.24-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 479
diff changeset
161 ngx_chain_t *in);
581
326634fb9d47 nginx-0.3.12-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
162 ngx_chain_t *ngx_chain_get_free_buf(ngx_pool_t *p, ngx_chain_t **free);
4114
5db098f97e0e API change: ngx_chain_update_chains() now requires pool.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3119
diff changeset
163 void ngx_chain_update_chains(ngx_pool_t *p, ngx_chain_t **free,
5db098f97e0e API change: ngx_chain_update_chains() now requires pool.
Maxim Dounin <mdounin@mdounin.ru>
parents: 3119
diff changeset
164 ngx_chain_t **busy, ngx_chain_t **out, ngx_buf_tag_t tag);
134
d57c6835225c nginx-0.0.1-2003-09-26-09:45:21 import
Igor Sysoev <igor@sysoev.ru>
parents: 130
diff changeset
165
5915
ac3f78219f85 Moved the code for coalescing file buffers to a separate function.
Valentin Bartenev <vbart@nginx.com>
parents: 5912
diff changeset
166 off_t ngx_chain_coalesce_file(ngx_chain_t **in, off_t limit);
ac3f78219f85 Moved the code for coalescing file buffers to a separate function.
Valentin Bartenev <vbart@nginx.com>
parents: 5912
diff changeset
167
5912
de68ed551bfb Renamed ngx_handle_sent_chain() to ngx_chain_update_sent().
Valentin Bartenev <vbart@nginx.com>
parents: 5850
diff changeset
168 ngx_chain_t *ngx_chain_update_sent(ngx_chain_t *in, off_t sent);
134
d57c6835225c nginx-0.0.1-2003-09-26-09:45:21 import
Igor Sysoev <igor@sysoev.ru>
parents: 130
diff changeset
169
343
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
Igor Sysoev <igor@sysoev.ru>
parents: 294
diff changeset
170 #endif /* _NGX_BUF_H_INCLUDED_ */