Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_readv_chain.c @ 220:4f81b931e9ff
nginx-0.0.1-2004-01-08-11:47:17 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 08 Jan 2004 08:47:17 +0000 |
parents | 0061d1f0908d |
children | 70e1c7d2b83d |
rev | line source |
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1 |
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2 #include <ngx_config.h> |
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3 #include <ngx_core.h> |
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4 #include <ngx_event.h> |
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5 |
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7 static int ngx_readv_error(ngx_event_t *rev, ngx_err_t err); |
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8 |
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9 #if (HAVE_KQUEUE) |
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11 ssize_t ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain) |
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12 { |
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13 char *prev; |
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14 ssize_t n, size; |
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15 struct iovec *iov; |
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16 ngx_err_t err; |
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17 ngx_array_t io; |
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18 ngx_event_t *rev; |
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19 |
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20 rev = c->read; |
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21 |
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22 if (ngx_event_flags & NGX_HAVE_KQUEUE_EVENT) { |
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23 ngx_log_debug(c->log, "recv: eof:%d, avail:%d, err:%d" _ |
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24 rev->kq_eof _ rev->available _ rev->kq_errno); |
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25 |
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26 if (rev->available == 0) { |
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27 if (rev->kq_eof) { |
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28 rev->ready = 0; |
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29 rev->eof = 1; |
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30 |
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31 if (rev->kq_errno) { |
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32 rev->error = 1; |
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33 ngx_set_socket_errno(rev->kq_errno); |
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34 return ngx_readv_error(rev, rev->kq_errno); |
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35 } |
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36 |
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37 return 0; |
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38 |
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39 } else { |
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40 return NGX_AGAIN; |
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41 } |
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42 } |
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43 } |
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44 |
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45 prev = NULL; |
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46 iov = NULL; |
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47 size = 0; |
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48 |
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49 ngx_init_array(io, c->pool, 10, sizeof(struct iovec), NGX_ERROR); |
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50 |
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51 /* coalesce the neighbouring hunks */ |
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52 |
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53 while (chain) { |
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54 if (prev == chain->hunk->last) { |
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55 iov->iov_len += chain->hunk->end - chain->hunk->last; |
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56 |
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57 } else { |
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58 ngx_test_null(iov, ngx_push_array(&io), NGX_ERROR); |
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59 iov->iov_base = chain->hunk->last; |
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60 iov->iov_len = chain->hunk->end - chain->hunk->last; |
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61 } |
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62 |
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63 size += chain->hunk->end - chain->hunk->last; |
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64 prev = chain->hunk->end; |
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65 chain = chain->next; |
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66 } |
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67 |
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68 ngx_log_debug(c->log, "recv: %d:%d" _ io.nelts _ iov->iov_len); |
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69 |
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70 rev = c->read; |
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71 |
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72 do { |
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73 n = readv(c->fd, (struct iovec *) io.elts, io.nelts); |
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74 |
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75 if (n >= 0) { |
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76 if (ngx_event_flags & NGX_HAVE_KQUEUE_EVENT) { |
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77 rev->available -= n; |
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78 |
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79 /* |
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80 * rev->available can be negative here because some additional |
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81 * bytes can be received between kevent() and recv() |
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82 */ |
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83 |
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84 if (rev->available <= 0) { |
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85 if (!rev->kq_eof) { |
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86 rev->ready = 0; |
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87 } |
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88 |
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89 if (rev->available < 0) { |
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90 rev->available = 0; |
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91 } |
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92 } |
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93 |
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94 return n; |
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95 } |
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96 |
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97 if (n < size) { |
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98 rev->ready = 0; |
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99 } |
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100 |
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101 if (n == 0) { |
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102 rev->eof = 1; |
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103 } |
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104 |
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105 return n; |
73
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106 } |
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107 |
188
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108 n = ngx_readv_error(rev, ngx_socket_errno); |
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109 |
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110 } while (n == NGX_EINTR); |
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111 |
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112 /* NGX_ERROR || NGX_AGAIN */ |
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113 |
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114 rev->ready = 0; |
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115 |
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116 if (n == NGX_ERROR){ |
164
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117 c->read->error = 1; |
73
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118 } |
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119 |
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120 return n; |
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121 } |
188
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122 |
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123 #else /* ! NAVE_KQUEUE */ |
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124 |
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125 ssize_t ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain) |
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126 { |
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127 char *prev; |
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128 ssize_t n, size; |
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129 struct iovec *iov; |
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130 ngx_err_t err; |
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131 ngx_array_t io; |
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132 ngx_event_t *rev; |
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133 |
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134 prev = NULL; |
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135 iov = NULL; |
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136 size = 0; |
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137 |
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138 ngx_init_array(io, c->pool, 10, sizeof(struct iovec), NGX_ERROR); |
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139 |
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140 /* coalesce the neighbouring hunks */ |
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141 |
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142 while (chain) { |
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143 if (prev == chain->hunk->last) { |
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144 iov->iov_len += chain->hunk->end - chain->hunk->last; |
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145 |
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146 } else { |
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147 ngx_test_null(iov, ngx_push_array(&io), NGX_ERROR); |
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148 iov->iov_base = chain->hunk->last; |
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149 iov->iov_len = chain->hunk->end - chain->hunk->last; |
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150 } |
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151 |
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152 size += chain->hunk->end - chain->hunk->last; |
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153 prev = chain->hunk->end; |
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154 chain = chain->next; |
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155 } |
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156 |
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157 ngx_log_debug(c->log, "recv: %d:%d" _ io.nelts _ iov->iov_len); |
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158 |
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159 rev = c->read; |
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160 |
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161 do { |
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162 n = readv(c->fd, (struct iovec *) io.elts, io.nelts); |
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163 |
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164 if (n >= 0) { |
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165 if (n < size) { |
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166 rev->ready = 0; |
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167 } |
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168 |
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169 if (n == 0) { |
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170 rev->eof = 1; |
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171 } |
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172 |
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173 return n; |
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174 } |
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175 |
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176 n = ngx_readv_error(rev, ngx_socket_errno); |
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177 |
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178 } while (n == NGX_EINTR); |
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179 |
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180 /* NGX_ERROR || NGX_AGAIN */ |
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181 |
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182 rev->ready = 0; |
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183 |
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184 if (n == NGX_ERROR){ |
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185 c->read->error = 1; |
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186 } |
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187 |
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188 return n; |
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189 } |
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190 |
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191 #endif /* NAVE_KQUEUE */ |
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192 |
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193 |
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194 static int ngx_readv_error(ngx_event_t *rev, ngx_err_t err) |
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195 { |
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196 if (err == NGX_EAGAIN) { |
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197 ngx_log_error(NGX_LOG_INFO, rev->log, err, "readv() returned EAGAIN"); |
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198 return NGX_AGAIN; |
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199 } |
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200 |
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201 if (err == NGX_EINTR) { |
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202 ngx_log_error(NGX_LOG_INFO, rev->log, err, "readv() returned EINTR"); |
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203 return NGX_EINTR; |
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204 } |
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205 |
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206 ngx_log_error(NGX_LOG_ERR, rev->log, err, "readv() failed"); |
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207 |
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208 return NGX_ERROR; |
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diff
changeset
|
209 } |