Mercurial > hg > nginx-quic
annotate src/core/ngx_buf.c @ 504:4cfdcb10967c
release-0.1.26 tag
author | Igor Sysoev <igor@sysoev.ru> |
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date | Tue, 22 Mar 2005 16:02:46 +0000 |
parents | d4ea69372b94 |
children | cd3117ad9aab |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
441
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4 */ |
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7 #include <ngx_config.h> |
100
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8 #include <ngx_core.h> |
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9 |
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10 |
499 | 11 ngx_buf_t * |
12 ngx_create_temp_buf(ngx_pool_t *pool, size_t size) | |
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13 { |
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14 ngx_buf_t *b; |
16
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15 |
501 | 16 b = ngx_calloc_buf(pool); |
17 if (b == NULL) { | |
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18 return NULL; |
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19 } |
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20 |
501 | 21 b->start = ngx_palloc(pool, size); |
22 if (b->start == NULL) { | |
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23 return NULL; |
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24 } |
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25 |
499 | 26 /* |
27 * set by ngx_calloc_buf(): | |
28 * | |
29 * b->file_pos = 0; | |
30 * b->file_last = 0; | |
31 * b->file = NULL; | |
32 * b->shadow = NULL; | |
33 * b->tag = 0; | |
34 * | |
35 */ | |
36 | |
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37 b->pos = b->start; |
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38 b->last = b->start; |
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39 b->end = b->last + size; |
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40 b->temporary = 1; |
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41 |
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42 return b; |
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43 } |
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44 |
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45 |
499 | 46 ngx_chain_t * |
47 ngx_create_chain_of_bufs(ngx_pool_t *pool, ngx_bufs_t *bufs) | |
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48 { |
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49 u_char *p; |
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50 ngx_int_t i; |
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51 ngx_buf_t *b; |
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52 ngx_chain_t *chain, *cl, **ll; |
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53 |
501 | 54 p = ngx_palloc(pool, bufs->num * bufs->size); |
55 if (p == NULL) { | |
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56 return NULL; |
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57 } |
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58 |
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59 ll = &chain; |
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60 |
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61 for (i = 0; i < bufs->num; i++) { |
501 | 62 |
63 b = ngx_calloc_buf(pool); | |
64 if (b == NULL) { | |
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65 return NULL; |
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66 } |
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67 |
499 | 68 /* |
69 * set by ngx_calloc_buf(): | |
70 * | |
71 * b->file_pos = 0; | |
72 * b->file_last = 0; | |
73 * b->file = NULL; | |
74 * b->shadow = NULL; | |
75 * b->tag = 0; | |
76 * | |
77 */ | |
78 | |
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79 b->pos = p; |
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80 b->last = p; |
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81 b->temporary = 1; |
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82 |
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83 b->start = p; |
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84 p += bufs->size; |
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85 b->end = p; |
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86 |
501 | 87 cl = ngx_alloc_chain_link(pool); |
88 if (cl == NULL) { | |
343
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89 return NULL; |
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90 } |
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91 |
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92 cl->buf = b; |
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93 *ll = cl; |
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94 ll = &cl->next; |
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95 } |
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96 |
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97 *ll = NULL; |
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98 |
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99 return chain; |
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100 } |
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101 |
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102 |
499 | 103 ngx_int_t |
104 ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, ngx_chain_t *in) | |
134
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105 { |
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106 ngx_chain_t *cl, **ll; |
134
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107 |
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108 ll = chain; |
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109 |
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110 for (cl = *chain; cl; cl = cl->next) { |
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111 ll = &cl->next; |
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112 } |
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113 |
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114 while (in) { |
501 | 115 cl = ngx_alloc_chain_link(pool); |
116 if (cl == NULL) { | |
117 return NGX_ERROR; | |
118 } | |
134
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119 |
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120 cl->buf = in->buf; |
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121 *ll = cl; |
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122 ll = &cl->next; |
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123 in = in->next; |
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124 } |
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125 |
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126 *ll = NULL; |
136
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127 |
134
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128 return NGX_OK; |
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129 } |
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130 |
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131 |
499 | 132 void |
133 ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy, | |
134 ngx_chain_t **out, ngx_buf_tag_t tag) | |
132
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135 { |
499 | 136 ngx_chain_t *cl; |
132
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137 |
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138 if (*busy == NULL) { |
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139 *busy = *out; |
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140 |
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141 } else { |
499 | 142 for (cl = *busy; cl->next; cl = cl->next) { /* void */ } |
455 | 143 |
499 | 144 cl->next = *out; |
132
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145 } |
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146 |
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147 *out = NULL; |
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148 |
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149 while (*busy) { |
343
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150 if (ngx_buf_size((*busy)->buf) != 0) { |
132
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151 break; |
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152 } |
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153 |
469 | 154 #if (NGX_HAVE_WRITE_ZEROCOPY) |
343
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155 if ((*busy)->buf->zerocopy_busy) { |
132
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156 break; |
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157 } |
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158 #endif |
151
2d9e4a8b6d11
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159 |
343
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160 if ((*busy)->buf->tag != tag) { |
135
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161 *busy = (*busy)->next; |
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162 continue; |
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163 } |
132
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164 |
452 | 165 (*busy)->buf->pos = (*busy)->buf->start; |
166 (*busy)->buf->last = (*busy)->buf->start; | |
132
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167 |
499 | 168 cl = *busy; |
169 *busy = cl->next; | |
170 cl->next = *free; | |
171 *free = cl; | |
132
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172 } |
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173 } |