Mercurial > hg > nginx-quic
annotate src/core/ngx_output_chain.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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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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5 |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_event.h> |
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10 |
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11 |
469 | 12 #if 0 |
13 #define NGX_SENDFILE_LIMIT 4096 | |
14 #endif | |
15 | |
16 | |
17 #define NGX_NONE 1 | |
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18 |
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19 |
467 | 20 static ngx_inline ngx_int_t |
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21 ngx_output_chain_need_to_copy(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf); |
469 | 22 static ngx_int_t ngx_output_chain_add_copy(ngx_pool_t *pool, |
499 | 23 ngx_chain_t **chain, ngx_chain_t *in); |
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24 static ngx_int_t ngx_output_chain_copy_buf(ngx_buf_t *dst, ngx_buf_t *src, |
499 | 25 ngx_uint_t sendfile); |
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26 |
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27 |
499 | 28 ngx_int_t |
29 ngx_output_chain(ngx_output_chain_ctx_t *ctx, ngx_chain_t *in) | |
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30 { |
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31 int rc, last; |
473 | 32 off_t bsize; |
33 size_t size; | |
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34 ngx_chain_t *cl, *out, **last_out; |
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35 |
455 | 36 if (ctx->in == NULL && ctx->busy == NULL) { |
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37 |
469 | 38 /* |
39 * the short path for the case when the ctx->in and ctx->busy chains | |
40 * are empty, the incoming chain is empty too or has the single buf | |
41 * that does not require the copy | |
42 */ | |
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43 |
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44 if (in == NULL) { |
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45 return ctx->output_filter(ctx->filter_ctx, in); |
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46 } |
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47 |
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48 if (in->next == NULL |
469 | 49 #if (NGX_SENDFILE_LIMIT) |
50 && !(in->buf->in_file && in->buf->file_last > NGX_SENDFILE_LIMIT) | |
51 #endif | |
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52 && (!ngx_output_chain_need_to_copy(ctx, in->buf))) |
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53 { |
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54 return ctx->output_filter(ctx->filter_ctx, in); |
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55 } |
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56 } |
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57 |
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58 /* add the incoming buf to the chain ctx->in */ |
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59 |
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60 if (in) { |
469 | 61 if (ngx_output_chain_add_copy(ctx->pool, &ctx->in, in) == NGX_ERROR) { |
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62 return NGX_ERROR; |
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63 } |
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64 } |
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65 |
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66 out = NULL; |
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67 last_out = &out; |
499 | 68 last = NGX_NONE; |
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69 |
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70 for ( ;; ) { |
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71 |
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72 while (ctx->in) { |
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73 |
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74 /* |
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75 * cycle while there are the ctx->in bufs |
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76 * or there are the free output bufs to copy in |
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77 */ |
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78 |
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79 bsize = ngx_buf_size(ctx->in->buf); |
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80 |
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81 if (bsize == 0 && !ngx_buf_special(ctx->in->buf)) { |
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82 |
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83 ngx_log_error(NGX_LOG_ALERT, ctx->pool->log, 0, |
483 | 84 "zero size buf in output " |
85 "t:%d r:%d f:%d %p %p-%p %p %O-%O", | |
86 ctx->in->buf->temporary, | |
87 ctx->in->buf->recycled, | |
88 ctx->in->buf->in_file, | |
89 ctx->in->buf->start, | |
90 ctx->in->buf->pos, | |
91 ctx->in->buf->last, | |
92 ctx->in->buf->file, | |
93 ctx->in->buf->file_pos, | |
94 ctx->in->buf->file_last); | |
403
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95 |
473 | 96 ngx_debug_point(); |
97 | |
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98 ctx->in = ctx->in->next; |
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99 |
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100 continue; |
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101 } |
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102 |
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103 if (!ngx_output_chain_need_to_copy(ctx, ctx->in->buf)) { |
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104 |
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105 /* move the chain link to the output chain */ |
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106 |
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107 cl = ctx->in; |
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108 ctx->in = cl->next; |
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109 |
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110 *last_out = cl; |
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111 last_out = &cl->next; |
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112 cl->next = NULL; |
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113 |
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114 continue; |
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115 } |
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116 |
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117 if (ctx->buf == NULL) { |
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118 |
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119 /* get the free buf */ |
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120 |
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121 if (ctx->free) { |
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122 ctx->buf = ctx->free->buf; |
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123 ctx->free = ctx->free->next; |
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124 |
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125 } else if (out || ctx->allocated == ctx->bufs.num) { |
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126 |
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127 break; |
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128 |
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129 } else { |
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130 |
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131 size = ctx->bufs.size; |
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132 |
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133 if (ctx->in->buf->last_buf) { |
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134 |
473 | 135 if (bsize < (off_t) ctx->bufs.size) { |
160
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136 |
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137 /* |
343
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138 * allocate small temp buf for the small last buf |
160
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139 * or its small last part |
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140 */ |
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141 |
473 | 142 size = (size_t) bsize; |
160
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143 |
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144 } else if (ctx->bufs.num == 1 |
473 | 145 && (bsize < (off_t) (ctx->bufs.size |
146 + (ctx->bufs.size >> 2)))) | |
160
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147 { |
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148 /* |
343
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149 * allocate a temp buf that equals |
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150 * to the last buf if the last buf size is lesser |
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151 * than 1.25 of bufs.size and a temp buf is single |
160
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152 */ |
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153 |
473 | 154 size = (size_t) bsize; |
160
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155 } |
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156 } |
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157 |
501 | 158 ctx->buf = ngx_create_temp_buf(ctx->pool, size); |
159 if (ctx->buf == NULL) { | |
343
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160 return NGX_ERROR; |
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161 } |
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162 |
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163 ctx->buf->tag = ctx->tag; |
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164 ctx->buf->recycled = 1; |
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165 ctx->allocated++; |
160
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166 } |
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167 } |
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168 |
343
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169 rc = ngx_output_chain_copy_buf(ctx->buf, ctx->in->buf, |
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170 ctx->sendfile); |
160
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171 |
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172 if (rc == NGX_ERROR) { |
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173 return rc; |
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174 } |
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175 |
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176 if (rc == NGX_AGAIN) { |
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177 if (out) { |
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178 break; |
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179 } |
430
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180 |
160
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181 return rc; |
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182 } |
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183 |
343
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184 /* delete the completed buf from the ctx->in chain */ |
160
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185 |
343
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186 if (ngx_buf_size(ctx->in->buf) == 0) { |
160
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187 ctx->in = ctx->in->next; |
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188 } |
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189 |
501 | 190 cl = ngx_alloc_chain_link(ctx->pool); |
191 if (cl == NULL) { | |
461 | 192 return NGX_ERROR; |
193 } | |
501 | 194 |
461 | 195 cl->buf = ctx->buf; |
196 cl->next = NULL; | |
160
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197 *last_out = cl; |
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198 last_out = &cl->next; |
343
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199 ctx->buf = NULL; |
160
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200 } |
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201 |
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202 if (out == NULL && last != NGX_NONE) { |
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203 return last; |
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204 } |
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205 |
294
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206 last = ctx->output_filter(ctx->filter_ctx, out); |
160
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207 |
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208 ngx_chain_update_chains(&ctx->free, &ctx->busy, &out, ctx->tag); |
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209 last_out = &out; |
320
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210 |
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211 if (last == NGX_ERROR) { |
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212 return last; |
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213 } |
160
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214 } |
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215 } |
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216 |
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217 |
467 | 218 static ngx_inline ngx_int_t |
499 | 219 ngx_output_chain_need_to_copy(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf) |
160
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220 { |
469 | 221 ngx_uint_t sendfile; |
222 | |
343
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223 if (ngx_buf_special(buf)) { |
160
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224 return 0; |
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225 } |
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226 |
469 | 227 sendfile = ctx->sendfile; |
228 | |
229 #if (NGX_SENDFILE_LIMIT) | |
230 | |
231 if (buf->in_file && buf->file_pos >= NGX_SENDFILE_LIMIT) { | |
232 sendfile = 0; | |
233 } | |
234 | |
235 #endif | |
236 | |
237 if (!sendfile) { | |
455 | 238 |
343
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239 if (!ngx_buf_in_memory(buf)) { |
170
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167
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240 return 1; |
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167
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241 } |
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167
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242 |
343
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243 buf->in_file = 0; |
160
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244 } |
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245 |
343
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246 if (ctx->need_in_memory && !ngx_buf_in_memory(buf)) { |
160
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247 return 1; |
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248 } |
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249 |
343
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250 if (ctx->need_in_temp && (buf->memory || buf->mmap)) { |
160
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251 return 1; |
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252 } |
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253 |
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254 return 0; |
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255 } |
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256 |
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257 |
499 | 258 static ngx_int_t |
259 ngx_output_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, | |
260 ngx_chain_t *in) | |
469 | 261 { |
262 ngx_chain_t *cl, **ll; | |
263 #if (NGX_SENDFILE_LIMIT) | |
264 ngx_buf_t *b, *buf; | |
265 #endif | |
266 | |
267 ll = chain; | |
268 | |
269 for (cl = *chain; cl; cl = cl->next) { | |
270 ll = &cl->next; | |
271 } | |
272 | |
273 while (in) { | |
274 | |
501 | 275 cl = ngx_alloc_chain_link(pool); |
276 if (cl == NULL) { | |
469 | 277 return NGX_ERROR; |
278 } | |
279 | |
280 #if (NGX_SENDFILE_LIMIT) | |
281 | |
282 buf = in->buf; | |
283 | |
284 if (buf->in_file | |
285 && buf->file_pos < NGX_SENDFILE_LIMIT | |
286 && buf->file_last > NGX_SENDFILE_LIMIT) | |
287 { | |
501 | 288 b = ngx_calloc_buf(pool); |
289 if (b == NULL) { | |
469 | 290 return NGX_ERROR; |
291 } | |
292 | |
293 ngx_memcpy(b, buf, sizeof(ngx_buf_t)); | |
294 | |
295 if (ngx_buf_in_memory(buf)) { | |
296 buf->pos += (ssize_t) (NGX_SENDFILE_LIMIT - buf->file_pos); | |
297 b->last = buf->pos; | |
298 } | |
299 | |
300 buf->file_pos = NGX_SENDFILE_LIMIT; | |
301 b->file_last = NGX_SENDFILE_LIMIT; | |
302 | |
303 cl->buf = b; | |
304 | |
305 } else { | |
306 cl->buf = buf; | |
307 in = in->next; | |
308 } | |
309 | |
310 #else | |
311 cl->buf = in->buf; | |
312 in = in->next; | |
313 | |
314 #endif | |
315 | |
316 *ll = cl; | |
317 ll = &cl->next; | |
318 } | |
319 | |
320 *ll = NULL; | |
321 | |
322 return NGX_OK; | |
323 } | |
324 | |
325 | |
499 | 326 static ngx_int_t |
327 ngx_output_chain_copy_buf(ngx_buf_t *dst, ngx_buf_t *src, ngx_uint_t sendfile) | |
160
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328 { |
473 | 329 off_t size; |
194
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330 ssize_t n; |
160
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331 |
343
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332 size = ngx_buf_size(src); |
160
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333 |
473 | 334 if (size > dst->end - dst->pos) { |
160
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335 size = dst->end - dst->pos; |
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336 } |
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337 |
469 | 338 #if (NGX_SENDFILE_LIMIT) |
339 | |
340 if (src->in_file && src->file_pos >= NGX_SENDFILE_LIMIT) { | |
341 sendfile = 0; | |
342 } | |
343 | |
344 #endif | |
345 | |
343
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346 if (ngx_buf_in_memory(src)) { |
473 | 347 ngx_memcpy(dst->pos, src->pos, (size_t) size); |
348 src->pos += (size_t) size; | |
349 dst->last += (size_t) size; | |
160
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350 |
455 | 351 if (src->in_file) { |
352 | |
353 if (sendfile) { | |
354 dst->in_file = 1; | |
355 dst->file = src->file; | |
356 dst->file_pos = src->file_pos; | |
357 dst->file_last = src->file_pos + size; | |
358 | |
359 } else { | |
360 dst->in_file = 0; | |
361 } | |
362 | |
160
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363 src->file_pos += size; |
452 | 364 |
365 } else { | |
366 dst->in_file = 0; | |
160
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367 } |
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368 |
343
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369 if (src->last_buf && src->pos == src->last) { |
6bdf858bff8c
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370 dst->last_buf = 1; |
160
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371 } |
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372 |
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373 } else { |
473 | 374 n = ngx_read_file(src->file, dst->pos, (size_t) size, src->file_pos); |
160
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375 |
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376 if (n == NGX_ERROR) { |
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377 return n; |
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378 } |
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379 |
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380 #if (NGX_FILE_AIO_READ) |
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381 if (n == NGX_AGAIN) { |
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382 return n; |
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383 } |
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384 #endif |
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385 |
473 | 386 if (n != size) { |
160
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387 ngx_log_error(NGX_LOG_ALERT, src->file->log, 0, |
473 | 388 ngx_read_file_n " reads only %z of %O from file", |
160
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389 n, size); |
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parents:
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390 if (n == 0) { |
e7e094d34162
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parents:
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391 return NGX_ERROR; |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
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parents:
diff
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392 } |
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nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
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393 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
394 |
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nginx-0.0.1-2003-10-27-11:53:49 import
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parents:
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395 dst->last += n; |
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parents:
diff
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|
396 |
452 | 397 if (sendfile) { |
398 dst->in_file = 1; | |
399 dst->file = src->file; | |
400 dst->file_pos = src->file_pos; | |
455 | 401 dst->file_last = src->file_pos + n; |
452 | 402 |
403 } else { | |
343
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parents:
334
diff
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|
404 dst->in_file = 0; |
160
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parents:
diff
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405 } |
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nginx-0.0.1-2003-10-27-11:53:49 import
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parents:
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406 |
455 | 407 src->file_pos += n; |
408 | |
343
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parents:
334
diff
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409 if (src->last_buf && src->file_pos == src->file_last) { |
6bdf858bff8c
nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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parents:
334
diff
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|
410 dst->last_buf = 1; |
160
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parents:
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|
411 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
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|
412 } |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
413 |
e7e094d34162
nginx-0.0.1-2003-10-27-11:53:49 import
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414 return NGX_OK; |
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parents:
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415 } |
162
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nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
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|
416 |
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417 |
499 | 418 ngx_int_t |
419 ngx_chain_writer(void *data, ngx_chain_t *in) | |
162
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420 { |
166
389d7ee9fa60
nginx-0.0.1-2003-10-30-11:51:06 import
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parents:
164
diff
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|
421 ngx_chain_writer_ctx_t *ctx = data; |
162
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422 |
473 | 423 off_t size; |
162
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160
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424 ngx_chain_t *cl; |
96993d4d5067
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425 |
473 | 426 for (size = 0; in; in = in->next) { |
427 | |
428 #if 1 | |
429 if (ngx_buf_size(in->buf) == 0 && !ngx_buf_special(in->buf)) { | |
430 ngx_debug_point(); | |
431 } | |
432 #endif | |
433 | |
434 size += ngx_buf_size(in->buf); | |
408
d6e2b445c1b8
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parents:
403
diff
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|
435 |
d6e2b445c1b8
nginx-0.0.10-2004-08-27-19:40:59 import
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parents:
403
diff
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|
436 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0, |
461 | 437 "chain writer buf size: %uz", ngx_buf_size(in->buf)); |
408
d6e2b445c1b8
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parents:
403
diff
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|
438 |
501 | 439 cl = ngx_alloc_chain_link(ctx->pool); |
440 if (cl == NULL) { | |
461 | 441 return NGX_ERROR; |
442 } | |
501 | 443 |
461 | 444 cl->buf = in->buf; |
445 cl->next = NULL; | |
162
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446 *ctx->last = cl; |
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447 ctx->last = &cl->next; |
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448 } |
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449 |
291
117ccc7c4055
nginx-0.0.3-2004-03-16-16:35:20 import
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parents:
257
diff
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|
450 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0, |
461 | 451 "chain writer in: %p", ctx->out); |
291
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452 |
473 | 453 for (cl = ctx->out; cl; cl = cl->next) { |
454 | |
455 #if 1 | |
456 if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { | |
457 ngx_debug_point(); | |
458 } | |
459 | |
460 #endif | |
461 | |
462 size += ngx_buf_size(cl->buf); | |
463 } | |
464 | |
465 if (size == 0) { | |
466 return NGX_OK; | |
467 } | |
468 | |
395
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nginx-0.0.7-2004-07-16-21:11:43 import
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parents:
362
diff
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|
469 ctx->out = ngx_send_chain(ctx->connection, ctx->out, ctx->limit); |
162
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160
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470 |
291
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257
diff
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|
471 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ctx->connection->log, 0, |
461 | 472 "chain writer out: %p", ctx->out); |
291
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473 |
162
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160
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|
474 if (ctx->out == NGX_CHAIN_ERROR) { |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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475 return NGX_ERROR; |
96993d4d5067
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476 } |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
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|
477 |
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nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
diff
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|
478 if (ctx->out == NULL) { |
96993d4d5067
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479 ctx->last = &ctx->out; |
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480 return NGX_OK; |
96993d4d5067
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parents:
160
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|
481 } |
96993d4d5067
nginx-0.0.1-2003-10-28-00:01:00 import
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parents:
160
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|
482 |
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nginx-0.0.1-2003-10-28-00:01:00 import
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483 return NGX_AGAIN; |
96993d4d5067
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parents:
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484 } |