Mercurial > hg > nginx-quic
annotate src/core/ngx_buf.h @ 2887:78277989e9ea
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author | Igor Sysoev <igor@sysoev.ru> |
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date | Mon, 25 May 2009 15:24:20 +0000 |
parents | cc13ff6d5c07 |
children | d2b183c39878 |
rev | line source |
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1 |
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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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18 |
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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 u_char *start; /* start of buffer */ |
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26 u_char *end; /* end of buffer */ |
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27 ngx_buf_tag_t tag; |
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28 ngx_file_t *file; |
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29 ngx_buf_t *shadow; |
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30 |
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32 /* the buf's content could be changed */ |
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33 unsigned temporary:1; |
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34 |
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35 /* |
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36 * the buf's content is in a memory cache or in a read only memory |
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37 * and must not be changed |
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38 */ |
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39 unsigned memory:1; |
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41 /* the buf's content is mmap()ed and must not be changed */ |
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42 unsigned mmap:1; |
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44 unsigned recycled:1; |
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45 unsigned in_file:1; |
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46 unsigned flush:1; |
509 | 47 unsigned sync:1; |
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48 unsigned last_buf:1; |
509 | 49 unsigned last_in_chain:1; |
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50 |
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51 unsigned last_shadow:1; |
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52 unsigned temp_file:1; |
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53 |
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54 /* STUB */ int num; |
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55 }; |
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58 struct ngx_chain_s { |
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59 ngx_buf_t *buf; |
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60 ngx_chain_t *next; |
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61 }; |
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64 typedef struct { |
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65 ngx_int_t num; |
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66 size_t size; |
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67 } ngx_bufs_t; |
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69 |
479 | 70 typedef ngx_int_t (*ngx_output_chain_filter_pt)(void *ctx, ngx_chain_t *in); |
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71 |
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72 typedef struct { |
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73 ngx_buf_t *buf; |
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74 ngx_chain_t *in; |
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75 ngx_chain_t *free; |
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76 ngx_chain_t *busy; |
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77 |
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78 unsigned sendfile; |
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79 unsigned directio; |
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80 #if (NGX_HAVE_ALIGNED_DIRECTIO) |
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81 unsigned unaligned; |
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82 #endif |
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83 unsigned need_in_memory; |
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84 unsigned need_in_temp; |
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85 |
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86 ngx_pool_t *pool; |
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87 ngx_int_t allocated; |
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88 ngx_bufs_t bufs; |
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89 ngx_buf_tag_t tag; |
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90 |
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91 ngx_output_chain_filter_pt output_filter; |
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92 void *filter_ctx; |
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93 } ngx_output_chain_ctx_t; |
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94 |
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95 |
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96 typedef struct { |
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97 ngx_chain_t *out; |
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98 ngx_chain_t **last; |
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99 ngx_connection_t *connection; |
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100 ngx_pool_t *pool; |
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101 off_t limit; |
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102 } ngx_chain_writer_ctx_t; |
162
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103 |
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104 |
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105 #define NGX_CHAIN_ERROR (ngx_chain_t *) NGX_ERROR |
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106 |
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107 |
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108 #define ngx_buf_in_memory(b) (b->temporary || b->memory || b->mmap) |
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109 #define ngx_buf_in_memory_only(b) (ngx_buf_in_memory(b) && !b->in_file) |
595 | 110 |
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111 #define ngx_buf_special(b) \ |
509 | 112 ((b->flush || b->last_buf || b->sync) \ |
113 && !ngx_buf_in_memory(b) && !b->in_file) | |
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114 |
595 | 115 #define ngx_buf_sync_only(b) \ |
116 (b->sync \ | |
117 && !ngx_buf_in_memory(b) && !b->in_file && !b->flush && !b->last_buf) | |
118 | |
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119 #define ngx_buf_size(b) \ |
499 | 120 (ngx_buf_in_memory(b) ? (off_t) (b->last - b->pos): \ |
121 (b->file_last - b->file_pos)) | |
343
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122 |
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123 ngx_buf_t *ngx_create_temp_buf(ngx_pool_t *pool, size_t size); |
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124 ngx_chain_t *ngx_create_chain_of_bufs(ngx_pool_t *pool, ngx_bufs_t *bufs); |
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125 |
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126 |
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127 #define ngx_alloc_buf(pool) ngx_palloc(pool, sizeof(ngx_buf_t)) |
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128 #define ngx_calloc_buf(pool) ngx_pcalloc(pool, sizeof(ngx_buf_t)) |
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129 |
507 | 130 ngx_chain_t *ngx_alloc_chain_link(ngx_pool_t *pool); |
131 #define ngx_free_chain(pool, cl) \ | |
132 cl->next = pool->chain; \ | |
133 pool->chain = cl | |
134 | |
155
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135 |
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136 |
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137 ngx_int_t ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in); |
479 | 138 ngx_int_t ngx_chain_writer(void *ctx, ngx_chain_t *in); |
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139 |
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140 ngx_int_t ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, |
499 | 141 ngx_chain_t *in); |
581 | 142 ngx_chain_t *ngx_chain_get_free_buf(ngx_pool_t *p, ngx_chain_t **free); |
134
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143 void ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy, |
499 | 144 ngx_chain_t **out, ngx_buf_tag_t tag); |
134
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145 |
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146 |
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147 #endif /* _NGX_BUF_H_INCLUDED_ */ |