Mercurial > hg > nginx
annotate src/core/ngx_buf.h @ 399:4e21d1291a14
nginx-0.0.7-2004-07-25-22:34:14 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Sun, 25 Jul 2004 18:34:14 +0000 |
parents | f8f0f1834266 |
children | da8c5707af39 |
rev | line source |
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1 #ifndef _NGX_BUF_H_INCLUDED_ |
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2 #define _NGX_BUF_H_INCLUDED_ |
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3 |
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4 |
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5 #include <ngx_config.h> |
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6 #include <ngx_core.h> |
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7 |
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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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35 |
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36 /* the last buf */ |
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37 #define NGX_HUNK_LAST 0x0200 |
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38 |
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39 |
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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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62 |
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63 |
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64 /* the buf's content can be changed */ |
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65 unsigned temporary:1; |
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66 |
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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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72 |
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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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79 |
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80 unsigned last_shadow:1; |
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81 unsigned temp_file:1; |
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82 |
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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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87 |
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88 |
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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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95 |
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96 |
141
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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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106 ngx_buf_t *buf; |
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107 ngx_chain_t *in; |
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108 ngx_chain_t *free; |
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109 ngx_chain_t *busy; |
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110 |
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111 unsigned sendfile; |
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112 unsigned need_in_memory; |
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113 unsigned need_in_temp; |
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114 |
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115 ngx_pool_t *pool; |
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116 ngx_int_t allocated; |
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117 ngx_bufs_t bufs; |
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118 ngx_buf_tag_t tag; |
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119 |
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120 ngx_output_chain_filter_pt output_filter; |
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121 void *filter_ctx; |
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122 } ngx_output_chain_ctx_t; |
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123 |
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124 |
162
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125 typedef struct { |
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126 ngx_chain_t *out; |
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127 ngx_chain_t **last; |
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128 ngx_connection_t *connection; |
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129 ngx_pool_t *pool; |
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130 off_t limit; |
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131 } ngx_chain_writer_ctx_t; |
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132 |
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133 |
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134 #define NGX_CHAIN_ERROR (ngx_chain_t *) NGX_ERROR |
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135 |
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136 |
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137 #define ngx_buf_in_memory(b) (b->temporary || b->memory || b->mmap) |
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138 #define ngx_buf_in_memory_only(b) (ngx_buf_in_memory(b) && !b->in_file) |
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139 #define ngx_buf_special(b) \ |
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140 ((b->flush || b->last_buf) && !ngx_buf_in_memory(b) && !b->in_file) |
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141 |
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142 #define ngx_buf_size(b) \ |
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143 (ngx_buf_in_memory(b) ? (size_t) (b->last - b->pos): \ |
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144 (size_t) (b->file_last - b->file_pos)) |
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145 |
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146 ngx_buf_t *ngx_create_temp_buf(ngx_pool_t *pool, size_t size); |
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147 ngx_chain_t *ngx_create_chain_of_bufs(ngx_pool_t *pool, ngx_bufs_t *bufs); |
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148 |
343
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149 |
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150 #define ngx_alloc_buf(pool) ngx_palloc(pool, sizeof(ngx_buf_t)) |
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151 #define ngx_calloc_buf(pool) ngx_pcalloc(pool, sizeof(ngx_buf_t)) |
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152 |
155
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153 |
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154 #define ngx_alloc_chain_link(pool) ngx_palloc(pool, sizeof(ngx_chain_t)) |
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155 |
7
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156 |
343
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157 #define ngx_alloc_link_and_set_buf(chain, b, pool, error) \ |
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158 do { \ |
155
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159 ngx_test_null(chain, ngx_alloc_chain_link(pool), error); \ |
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160 chain->buf = b; \ |
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161 chain->next = NULL; \ |
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162 } while (0); |
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163 |
155
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164 |
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165 #define ngx_chain_add_link(chain, last, cl) \ |
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166 if (chain) { \ |
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167 *last = cl; \ |
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168 } else { \ |
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169 chain = cl; \ |
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170 } \ |
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171 last = &cl->next |
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172 |
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173 |
356
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174 ngx_int_t ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in); |
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175 ngx_int_t ngx_chain_writer(void *data, ngx_chain_t *in); |
162
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176 |
356
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177 ngx_int_t ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, |
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178 ngx_chain_t *in); |
134
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179 void ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy, |
343
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180 ngx_chain_t **out, ngx_buf_tag_t tag); |
134
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181 |
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182 |
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183 #endif /* _NGX_BUF_H_INCLUDED_ */ |