Mercurial > hg > nginx-quic
annotate src/core/ngx_buf.h @ 445:f26432a1935a
nginx-0.1.0-2004-09-30-10:38:49 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 30 Sep 2004 06:38:49 +0000 |
parents | 42d11f017717 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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7 #ifndef _NGX_BUF_H_INCLUDED_ |
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8 #define _NGX_BUF_H_INCLUDED_ |
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11 #include <ngx_config.h> |
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12 #include <ngx_core.h> |
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15 typedef void * ngx_buf_tag_t; |
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17 typedef struct ngx_buf_s ngx_buf_t; |
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19 struct ngx_buf_s { |
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20 u_char *pos; |
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21 u_char *last; |
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22 off_t file_pos; |
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23 off_t file_last; |
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24 |
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25 int type; |
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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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33 /* the buf's content could be changed */ |
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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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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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48 unsigned last_buf:1; |
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49 |
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50 unsigned last_shadow:1; |
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51 unsigned temp_file:1; |
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52 |
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53 unsigned zerocopy_busy:1; |
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54 |
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55 /* STUB */ int num; |
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56 }; |
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59 typedef struct ngx_chain_s ngx_chain_t; |
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61 struct ngx_chain_s { |
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62 ngx_buf_t *buf; |
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63 ngx_chain_t *next; |
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64 }; |
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67 typedef struct { |
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68 ngx_int_t num; |
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69 size_t size; |
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70 } ngx_bufs_t; |
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73 typedef int (*ngx_output_chain_filter_pt)(void *ctx, ngx_chain_t *out); |
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74 |
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75 typedef struct { |
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76 ngx_buf_t *buf; |
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77 ngx_chain_t *in; |
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78 ngx_chain_t *free; |
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79 ngx_chain_t *busy; |
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80 |
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81 unsigned sendfile; |
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82 unsigned need_in_memory; |
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83 unsigned need_in_temp; |
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84 |
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85 ngx_pool_t *pool; |
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86 ngx_int_t allocated; |
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87 ngx_bufs_t bufs; |
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88 ngx_buf_tag_t tag; |
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89 |
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90 ngx_output_chain_filter_pt output_filter; |
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91 void *filter_ctx; |
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92 } ngx_output_chain_ctx_t; |
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93 |
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95 typedef struct { |
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96 ngx_chain_t *out; |
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97 ngx_chain_t **last; |
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98 ngx_connection_t *connection; |
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99 ngx_pool_t *pool; |
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100 off_t limit; |
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101 } ngx_chain_writer_ctx_t; |
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102 |
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103 |
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104 #define NGX_CHAIN_ERROR (ngx_chain_t *) NGX_ERROR |
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105 |
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106 |
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107 #define ngx_buf_in_memory(b) (b->temporary || b->memory || b->mmap) |
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108 #define ngx_buf_in_memory_only(b) (ngx_buf_in_memory(b) && !b->in_file) |
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109 #define ngx_buf_special(b) \ |
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110 ((b->flush || b->last_buf) && !ngx_buf_in_memory(b) && !b->in_file) |
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111 |
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112 #define ngx_buf_size(b) \ |
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113 (ngx_buf_in_memory(b) ? (size_t) (b->last - b->pos): \ |
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114 (size_t) (b->file_last - b->file_pos)) |
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115 |
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116 ngx_buf_t *ngx_create_temp_buf(ngx_pool_t *pool, size_t size); |
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117 ngx_chain_t *ngx_create_chain_of_bufs(ngx_pool_t *pool, ngx_bufs_t *bufs); |
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118 |
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119 |
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120 #define ngx_alloc_buf(pool) ngx_palloc(pool, sizeof(ngx_buf_t)) |
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121 #define ngx_calloc_buf(pool) ngx_pcalloc(pool, sizeof(ngx_buf_t)) |
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122 |
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123 |
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124 #define ngx_alloc_chain_link(pool) ngx_palloc(pool, sizeof(ngx_chain_t)) |
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125 |
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126 |
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127 #define ngx_alloc_link_and_set_buf(chain, b, pool, error) \ |
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128 do { \ |
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129 ngx_test_null(chain, ngx_alloc_chain_link(pool), error); \ |
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130 chain->buf = b; \ |
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131 chain->next = NULL; \ |
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132 } while (0); |
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133 |
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134 |
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135 #define ngx_chain_add_link(chain, last, cl) \ |
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136 if (chain) { \ |
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137 *last = cl; \ |
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138 } else { \ |
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139 chain = cl; \ |
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140 } \ |
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141 last = &cl->next |
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142 |
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143 |
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144 ngx_int_t ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in); |
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145 ngx_int_t ngx_chain_writer(void *data, ngx_chain_t *in); |
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146 |
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147 ngx_int_t ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, |
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148 ngx_chain_t *in); |
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149 void ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy, |
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150 ngx_chain_t **out, ngx_buf_tag_t tag); |
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151 |
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152 |
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153 #endif /* _NGX_BUF_H_INCLUDED_ */ |