Mercurial > hg > nginx
annotate src/os/unix/ngx_writev_chain.c @ 93:738fe44c70d5
nginx-0.0.1-2003-05-21-17:28:21 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 21 May 2003 13:28:21 +0000 |
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children | 8220378432a8 |
rev | line source |
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93
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nginx-0.0.1-2003-05-21-17:28:21 import
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1 |
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nginx-0.0.1-2003-05-21-17:28:21 import
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2 #include <ngx_config.h> |
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nginx-0.0.1-2003-05-21-17:28:21 import
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3 #include <ngx_core.h> |
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4 |
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5 |
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nginx-0.0.1-2003-05-21-17:28:21 import
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6 ngx_chain_t *ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in) |
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7 { |
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nginx-0.0.1-2003-05-21-17:28:21 import
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8 char *prev; |
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nginx-0.0.1-2003-05-21-17:28:21 import
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9 size_t size; |
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nginx-0.0.1-2003-05-21-17:28:21 import
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10 ssize_t n; |
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nginx-0.0.1-2003-05-21-17:28:21 import
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11 off_t sent; |
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nginx-0.0.1-2003-05-21-17:28:21 import
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12 struct iovec *iov; |
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nginx-0.0.1-2003-05-21-17:28:21 import
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13 ngx_err_t err; |
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nginx-0.0.1-2003-05-21-17:28:21 import
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14 ngx_array_t io; |
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nginx-0.0.1-2003-05-21-17:28:21 import
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15 ngx_chain_t *ce; |
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16 |
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nginx-0.0.1-2003-05-21-17:28:21 import
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17 ngx_init_array(io, c->pool, 10, sizeof(struct iovec), NGX_CHAIN_ERROR); |
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18 |
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19 prev = NULL; |
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20 iov = NULL; |
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21 |
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nginx-0.0.1-2003-05-21-17:28:21 import
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22 /* create the iovec and coalesce the neighbouring chain entries */ |
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23 for (ce = in; ce; ce = ce->next) { |
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24 |
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nginx-0.0.1-2003-05-21-17:28:21 import
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25 if (prev == ce->hunk->pos) { |
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26 iov->iov_len += ce->hunk->last - ce->hunk->pos; |
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27 prev = ce->hunk->last; |
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28 |
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29 } else { |
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30 ngx_test_null(iov, ngx_push_array(&io), NGX_CHAIN_ERROR); |
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31 iov->iov_base = ce->hunk->pos; |
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32 iov->iov_len = ce->hunk->last - ce->hunk->pos; |
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33 prev = ce->hunk->last; |
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34 } |
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35 } |
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nginx-0.0.1-2003-05-21-17:28:21 import
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36 |
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nginx-0.0.1-2003-05-21-17:28:21 import
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37 n = writev(c->fd, (struct iovec *) io.elts, io.nelts); |
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38 |
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nginx-0.0.1-2003-05-21-17:28:21 import
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39 if (n == -1) { |
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nginx-0.0.1-2003-05-21-17:28:21 import
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40 err = ngx_errno; |
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nginx-0.0.1-2003-05-21-17:28:21 import
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41 if (err == NGX_EAGAIN) { |
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nginx-0.0.1-2003-05-21-17:28:21 import
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42 ngx_log_error(NGX_LOG_INFO, c->log, err, "writev() EAGAIN"); |
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43 |
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44 } else if (err == NGX_EINTR) { |
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nginx-0.0.1-2003-05-21-17:28:21 import
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45 ngx_log_error(NGX_LOG_INFO, c->log, err, "writev() EINTR"); |
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nginx-0.0.1-2003-05-21-17:28:21 import
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46 |
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47 } else { |
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nginx-0.0.1-2003-05-21-17:28:21 import
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48 ngx_log_error(NGX_LOG_CRIT, c->log, err, "writev() failed"); |
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49 return NGX_CHAIN_ERROR; |
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50 } |
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51 } |
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52 |
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53 sent = n > 0 ? n : 0; |
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54 |
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nginx-0.0.1-2003-05-21-17:28:21 import
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55 #if (NGX_DEBUG_WRITE_CHAIN) |
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56 ngx_log_debug(c->log, "writev: %qd" _ sent); |
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57 #endif |
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58 |
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59 c->sent += sent; |
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60 |
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61 for (ce = in; ce && sent > 0; ce = ce->next) { |
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62 |
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63 size = ce->hunk->last - ce->hunk->pos; |
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64 |
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65 if (sent >= size) { |
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66 sent -= size; |
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67 |
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68 if (ce->hunk->type & NGX_HUNK_IN_MEMORY) { |
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69 ce->hunk->pos = ce->hunk->last; |
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70 } |
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71 |
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72 if (ce->hunk->type & NGX_HUNK_FILE) { |
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73 ce->hunk->file_pos = ce->hunk->file_last; |
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74 } |
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75 |
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76 continue; |
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77 } |
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78 |
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79 if (ce->hunk->type & NGX_HUNK_IN_MEMORY) { |
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80 ce->hunk->pos += sent; |
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81 } |
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82 |
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83 if (ce->hunk->type & NGX_HUNK_FILE) { |
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84 ce->hunk->file_pos += sent; |
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85 } |
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86 |
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87 break; |
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88 } |
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89 |
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90 ngx_destroy_array(&io); |
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91 |
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92 return ce; |
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93 } |