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annotate src/core/ngx_buf.h @ 348:68ff8000a974

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nginx-0.0.3-2004-06-09-11:45:27 import
author Igor Sysoev <igor@sysoev.ru>
date Wed, 09 Jun 2004 07:45:27 +0000
parents e366ba5db8f8
children 2e3cbc1bbe3c
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1 #ifndef _NGX_BUF_H_INCLUDED_
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2 #define _NGX_BUF_H_INCLUDED_
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5 #include <ngx_config.h>
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6 #include <ngx_core.h>
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9 #if 0
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10 /* the buf type */
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12 /* the buf's content is in memory */
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13 #define NGX_HUNK_IN_MEMORY 0x0001
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14 /* the buf's content can be changed */
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15 #define NGX_HUNK_TEMP 0x0002
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16 /* the buf's content is in cache and can not be changed */
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17 #define NGX_HUNK_MEMORY 0x0004
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18 #define NGX_HUNK_MMAP 0x0008
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20 /* the buf's content is recycled */
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21 #define NGX_HUNK_RECYCLED 0x0010
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23 /* the buf's content is in a file */
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24 #define NGX_HUNK_FILE 0x0020
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26 #define NGX_HUNK_STORAGE (NGX_HUNK_IN_MEMORY \
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27 |NGX_HUNK_TEMP|NGX_HUNK_MEMORY|NGX_HUNK_MMAP \
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28 |NGX_HUNK_RECYCLED|NGX_HUNK_FILE)
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30 /* the buf flags */
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32 /* in thread state flush means to write the buf completely before return */
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33 /* in event state flush means to start to write the buf */
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34 #define NGX_HUNK_FLUSH 0x0100
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36 /* the last buf */
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37 #define NGX_HUNK_LAST 0x0200
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40 #define NGX_HUNK_PREREAD 0x2000
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41 #define NGX_HUNK_LAST_SHADOW 0x4000
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42 #define NGX_HUNK_TEMP_FILE 0x8000
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43 #endif
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46 typedef void * ngx_buf_tag_t;
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48 typedef struct ngx_buf_s ngx_buf_t;
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50 struct ngx_buf_s {
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51 u_char *pos;
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52 u_char *last;
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53 off_t file_pos;
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54 off_t file_last;
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56 int type;
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57 u_char *start; /* start of buffer */
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58 u_char *end; /* end of buffer */
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59 ngx_buf_tag_t tag;
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60 ngx_file_t *file;
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61 ngx_buf_t *shadow;
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64 /* the buf's content can be changed */
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65 unsigned temporary:1;
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67 /*
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68 * the buf's content is in a memory cache or in a read only memory
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69 * and can not be changed
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70 */
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71 unsigned memory:1;
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73 /* the buf's content is mmap()ed and can not be changed */
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74 unsigned mmap:1;
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75 unsigned recycled:1;
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76 unsigned in_file:1;
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77 unsigned flush:1;
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78 unsigned last_buf:1;
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80 unsigned last_shadow:1;
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81 unsigned temp_file:1;
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83 unsigned zerocopy_busy:1;
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84
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85 /* STUB */ int num;
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86 };
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89 typedef struct ngx_chain_s ngx_chain_t;
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90
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91 struct ngx_chain_s {
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92 ngx_buf_t *buf;
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93 ngx_chain_t *next;
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94 };
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97 typedef struct {
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98 ngx_int_t num;
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99 size_t size;
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100 } ngx_bufs_t;
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101
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102
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103 typedef int (*ngx_output_chain_filter_pt)(void *ctx, ngx_chain_t *out);
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104
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105 typedef struct {
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6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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parents: 294
diff changeset
106 ngx_buf_t *buf;
160
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
107 ngx_chain_t *in;
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
108 ngx_chain_t *free;
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
109 ngx_chain_t *busy;
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
110
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
111 unsigned sendfile;
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
112 unsigned need_in_memory;
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
113 unsigned need_in_temp;
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
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 ngx_pool_t *pool;
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
116 ngx_int_t allocated;
160
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
117 ngx_bufs_t bufs;
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
118 ngx_buf_tag_t tag;
160
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
119
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
120 ngx_output_chain_filter_pt output_filter;
294
5cfd65b8b0a7 nginx-0.0.3-2004-03-23-09:01:52 import
Igor Sysoev <igor@sysoev.ru>
parents: 290
diff changeset
121 void *filter_ctx;
160
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
122 } ngx_output_chain_ctx_t;
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
123
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
124
162
96993d4d5067 nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 160
diff changeset
125 typedef struct {
96993d4d5067 nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 160
diff changeset
126 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
127 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
128 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
129 ngx_pool_t *pool;
166
389d7ee9fa60 nginx-0.0.1-2003-10-30-11:51:06 import
Igor Sysoev <igor@sysoev.ru>
parents: 162
diff changeset
130 } 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
131
96993d4d5067 nginx-0.0.1-2003-10-28-00:01:00 import
Igor Sysoev <igor@sysoev.ru>
parents: 160
diff changeset
132
61
4f3e2abcc2c4 nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents: 47
diff changeset
133 #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
134
4f3e2abcc2c4 nginx-0.0.1-2003-02-11-19:42:23 import
Igor Sysoev <igor@sysoev.ru>
parents: 47
diff changeset
135
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
136 #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
137 #define ngx_buf_in_memory_only(b) (ngx_buf_in_memory(b) && !b->in_file)
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
138 #define ngx_buf_special(b) \
348
68ff8000a974 nginx-0.0.3-2004-06-09-11:45:27 import
Igor Sysoev <igor@sysoev.ru>
parents: 344
diff changeset
139 ((b->flush || b->last_buf) && !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
140
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
141 #define ngx_buf_size(b) \
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 (ngx_buf_in_memory(b) ? (size_t) (b->last - b->pos): \
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 (size_t) (b->file_last - b->file_pos))
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
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
145 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
146 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
147
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
148
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
149 #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
150 #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
151
155
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 154
diff changeset
152
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 154
diff changeset
153 #define ngx_alloc_chain_link(pool) ngx_palloc(pool, sizeof(ngx_chain_t))
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 154
diff changeset
154
7
b5481d6fbbd4 nginx-0.0.1-2002-08-29-20:59:54 import
Igor Sysoev <igor@sysoev.ru>
parents: 6
diff changeset
155
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
156 #define ngx_alloc_link_and_set_buf(chain, b, pool, error) \
4
c5f071d376e5 nginx-0.0.1-2002-08-22-19:24:03 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
157 do { \
155
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 154
diff changeset
158 ngx_test_null(chain, ngx_alloc_chain_link(pool), error); \
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
159 chain->buf = b; \
4
c5f071d376e5 nginx-0.0.1-2002-08-22-19:24:03 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
160 chain->next = NULL; \
c5f071d376e5 nginx-0.0.1-2002-08-22-19:24:03 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
161 } while (0);
c5f071d376e5 nginx-0.0.1-2002-08-22-19:24:03 import
Igor Sysoev <igor@sysoev.ru>
parents: 3
diff changeset
162
155
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 154
diff changeset
163
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 154
diff changeset
164 #define ngx_chain_add_link(chain, last, cl) \
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 154
diff changeset
165 if (chain) { \
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 154
diff changeset
166 *last = cl; \
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 154
diff changeset
167 } else { \
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 154
diff changeset
168 chain = cl; \
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 154
diff changeset
169 } \
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 154
diff changeset
170 last = &cl->next
145
58557d0cccd1 nginx-0.0.1-2003-10-13-20:32:29 import
Igor Sysoev <igor@sysoev.ru>
parents: 142
diff changeset
171
58557d0cccd1 nginx-0.0.1-2003-10-13-20:32:29 import
Igor Sysoev <igor@sysoev.ru>
parents: 142
diff changeset
172
160
e7e094d34162 nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents: 155
diff changeset
173 int ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in);
166
389d7ee9fa60 nginx-0.0.1-2003-10-30-11:51:06 import
Igor Sysoev <igor@sysoev.ru>
parents: 162
diff changeset
174 int ngx_chain_writer(void *data, 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
175
155
46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
Igor Sysoev <igor@sysoev.ru>
parents: 154
diff changeset
176 int ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, ngx_chain_t *in);
134
d57c6835225c nginx-0.0.1-2003-09-26-09:45:21 import
Igor Sysoev <igor@sysoev.ru>
parents: 130
diff changeset
177 void ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy,
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
178 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
179
d57c6835225c nginx-0.0.1-2003-09-26-09:45:21 import
Igor Sysoev <igor@sysoev.ru>
parents: 130
diff changeset
180
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
181 #endif /* _NGX_BUF_H_INCLUDED_ */