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annotate src/core/ngx_buf.h @ 507:cd3117ad9aab release-0.1.28

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nginx-0.1.28-RELEASE import *) Bugfix: nginx hogs CPU while proxying the huge files. *) Bugfix: nginx could not be built by gcc 4.0 on Linux.
author Igor Sysoev <igor@sysoev.ru>
date Fri, 08 Apr 2005 15:18:55 +0000
parents d4ea69372b94
children 9b8c906f6e63
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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6
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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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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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32 /* the buf's content could be changed */
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33 unsigned temporary:1;
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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;
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47 unsigned last_buf:1;
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49 unsigned last_shadow:1;
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50 unsigned temp_file:1;
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52 unsigned zerocopy_busy:1;
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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
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70 typedef ngx_int_t (*ngx_output_chain_filter_pt)(void *ctx, ngx_chain_t *in);
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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 need_in_memory;
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80 unsigned need_in_temp;
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81
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82 ngx_pool_t *pool;
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83 ngx_int_t allocated;
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84 ngx_bufs_t bufs;
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85 ngx_buf_tag_t tag;
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87 ngx_output_chain_filter_pt output_filter;
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88 void *filter_ctx;
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89 } ngx_output_chain_ctx_t;
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91
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92 typedef struct {
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93 ngx_chain_t *out;
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94 ngx_chain_t **last;
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95 ngx_connection_t *connection;
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96 ngx_pool_t *pool;
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97 off_t limit;
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98 } ngx_chain_writer_ctx_t;
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99
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100
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101 #define NGX_CHAIN_ERROR (ngx_chain_t *) NGX_ERROR
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102
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103
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104 #define ngx_buf_in_memory(b) (b->temporary || b->memory || b->mmap)
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105 #define ngx_buf_in_memory_only(b) (ngx_buf_in_memory(b) && !b->in_file)
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106 #define ngx_buf_special(b) \
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107 ((b->flush || b->last_buf) && !ngx_buf_in_memory(b) && !b->in_file)
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108
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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109 #define ngx_buf_size(b) \
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64d9afb209da nginx-0.1.24-RELEASE import
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110 (ngx_buf_in_memory(b) ? (off_t) (b->last - b->pos): \
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111 (b->file_last - b->file_pos))
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112
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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113 ngx_buf_t *ngx_create_temp_buf(ngx_pool_t *pool, size_t size);
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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114 ngx_chain_t *ngx_create_chain_of_bufs(ngx_pool_t *pool, ngx_bufs_t *bufs);
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708f8bb772ec nginx-0.0.1-2002-09-02-18:48:24 import
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115
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116
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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117 #define ngx_alloc_buf(pool) ngx_palloc(pool, sizeof(ngx_buf_t))
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118 #define ngx_calloc_buf(pool) ngx_pcalloc(pool, sizeof(ngx_buf_t))
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869b10be682f nginx-0.0.1-2003-04-14-21:04:58 import
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119
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cd3117ad9aab nginx-0.1.28-RELEASE import
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120 ngx_chain_t *ngx_alloc_chain_link(ngx_pool_t *pool);
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121 #define ngx_free_chain(pool, cl) \
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122 cl->next = pool->chain; \
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123 pool->chain = cl
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124
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46eb23d9471d nginx-0.0.1-2003-10-22-20:38:26 import
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125
7
b5481d6fbbd4 nginx-0.0.1-2002-08-29-20:59:54 import
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126
356
2e3cbc1bbe3c nginx-0.0.7-2004-06-16-19:32:11 import
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127 ngx_int_t ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in);
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c52408583801 nginx-0.1.14-RELEASE import
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128 ngx_int_t ngx_chain_writer(void *ctx, ngx_chain_t *in);
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96993d4d5067 nginx-0.0.1-2003-10-28-00:01:00 import
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129
356
2e3cbc1bbe3c nginx-0.0.7-2004-06-16-19:32:11 import
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130 ngx_int_t ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain,
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diff changeset
131 ngx_chain_t *in);
134
d57c6835225c nginx-0.0.1-2003-09-26-09:45:21 import
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132 void ngx_chain_update_chains(ngx_chain_t **free, ngx_chain_t **busy,
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133 ngx_chain_t **out, ngx_buf_tag_t tag);
134
d57c6835225c nginx-0.0.1-2003-09-26-09:45:21 import
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134
d57c6835225c nginx-0.0.1-2003-09-26-09:45:21 import
Igor Sysoev <igor@sysoev.ru>
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135
343
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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diff changeset
136 #endif /* _NGX_BUF_H_INCLUDED_ */