Mercurial > hg > nginx-quic
annotate src/core/ngx_buf.h @ 4726:dad38cdaf496 stable-1.2
Merge of r4686, r4687: $status variable.
Contains response status code as a 3-digit integer
(with leading zeroes if necessary), or one of the following values:
000 - response status code has not yet been assigned
009 - HTTP/0.9 request is being processed
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Mon, 02 Jul 2012 16:53:36 +0000 |
parents | d620f497c50f |
children | f9c83484d9ce |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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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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14 |
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16 typedef void * ngx_buf_tag_t; |
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17 |
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18 typedef struct ngx_buf_s ngx_buf_t; |
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19 |
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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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25 |
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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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31 |
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32 |
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33 /* the buf's content could be changed */ |
343
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34 unsigned temporary:1; |
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35 |
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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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41 |
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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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44 |
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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; |
509 | 48 unsigned sync:1; |
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49 unsigned last_buf:1; |
509 | 50 unsigned last_in_chain:1; |
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51 |
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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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57 |
61
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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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63 |
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64 |
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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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69 |
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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 |
479 | 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 #if (NGX_HAVE_FILE_AIO) |
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76 typedef void (*ngx_output_chain_aio_pt)(ngx_output_chain_ctx_t *ctx, |
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77 ngx_file_t *file); |
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78 #endif |
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79 |
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80 struct ngx_output_chain_ctx_s { |
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81 ngx_buf_t *buf; |
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82 ngx_chain_t *in; |
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83 ngx_chain_t *free; |
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84 ngx_chain_t *busy; |
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85 |
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86 unsigned sendfile:1; |
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87 unsigned directio:1; |
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88 #if (NGX_HAVE_ALIGNED_DIRECTIO) |
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89 unsigned unaligned:1; |
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90 #endif |
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91 unsigned need_in_memory:1; |
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92 unsigned need_in_temp:1; |
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93 #if (NGX_HAVE_FILE_AIO) |
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94 unsigned aio:1; |
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95 |
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96 ngx_output_chain_aio_pt aio_handler; |
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97 #endif |
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98 |
3053 | 99 off_t alignment; |
100 | |
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101 ngx_pool_t *pool; |
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102 ngx_int_t allocated; |
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103 ngx_bufs_t bufs; |
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104 ngx_buf_tag_t tag; |
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105 |
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106 ngx_output_chain_filter_pt output_filter; |
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107 void *filter_ctx; |
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108 }; |
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109 |
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110 |
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111 typedef struct { |
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112 ngx_chain_t *out; |
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113 ngx_chain_t **last; |
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114 ngx_connection_t *connection; |
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115 ngx_pool_t *pool; |
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116 off_t limit; |
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117 } ngx_chain_writer_ctx_t; |
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118 |
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119 |
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120 #define NGX_CHAIN_ERROR (ngx_chain_t *) NGX_ERROR |
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121 |
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122 |
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123 #define ngx_buf_in_memory(b) (b->temporary || b->memory || b->mmap) |
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124 #define ngx_buf_in_memory_only(b) (ngx_buf_in_memory(b) && !b->in_file) |
595 | 125 |
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126 #define ngx_buf_special(b) \ |
509 | 127 ((b->flush || b->last_buf || b->sync) \ |
128 && !ngx_buf_in_memory(b) && !b->in_file) | |
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129 |
595 | 130 #define ngx_buf_sync_only(b) \ |
131 (b->sync \ | |
132 && !ngx_buf_in_memory(b) && !b->in_file && !b->flush && !b->last_buf) | |
133 | |
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134 #define ngx_buf_size(b) \ |
499 | 135 (ngx_buf_in_memory(b) ? (off_t) (b->last - b->pos): \ |
136 (b->file_last - b->file_pos)) | |
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137 |
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138 ngx_buf_t *ngx_create_temp_buf(ngx_pool_t *pool, size_t size); |
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139 ngx_chain_t *ngx_create_chain_of_bufs(ngx_pool_t *pool, ngx_bufs_t *bufs); |
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140 |
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141 |
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142 #define ngx_alloc_buf(pool) ngx_palloc(pool, sizeof(ngx_buf_t)) |
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143 #define ngx_calloc_buf(pool) ngx_pcalloc(pool, sizeof(ngx_buf_t)) |
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144 |
507 | 145 ngx_chain_t *ngx_alloc_chain_link(ngx_pool_t *pool); |
146 #define ngx_free_chain(pool, cl) \ | |
147 cl->next = pool->chain; \ | |
148 pool->chain = cl | |
149 | |
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150 |
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151 |
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152 ngx_int_t ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in); |
479 | 153 ngx_int_t ngx_chain_writer(void *ctx, ngx_chain_t *in); |
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154 |
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155 ngx_int_t ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, |
499 | 156 ngx_chain_t *in); |
581 | 157 ngx_chain_t *ngx_chain_get_free_buf(ngx_pool_t *p, ngx_chain_t **free); |
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158 void ngx_chain_update_chains(ngx_pool_t *p, ngx_chain_t **free, |
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159 ngx_chain_t **busy, ngx_chain_t **out, ngx_buf_tag_t tag); |
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160 |
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161 |
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162 #endif /* _NGX_BUF_H_INCLUDED_ */ |