Mercurial > hg > nginx
annotate src/os/unix/ngx_writev_chain.c @ 315:39b6f2df45c0
nginx-0.0.3-2004-04-14-21:44:28 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 14 Apr 2004 17:44:28 +0000 |
parents | 87e73f067470 |
children | 6bdf858bff8c |
rev | line source |
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93
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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 ngx_chain_t *ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in) |
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8 { |
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9 u_char *prev; |
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10 ssize_t n, size; |
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11 off_t sent; |
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12 struct iovec *iov; |
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13 ngx_int_t eintr; |
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14 ngx_err_t err; |
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15 ngx_array_t io; |
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16 ngx_chain_t *cl; |
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17 ngx_event_t *wev; |
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18 |
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19 wev = c->write; |
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20 |
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21 if (!wev->ready) { |
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22 return in; |
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23 } |
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24 |
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25 #if (HAVE_KQUEUE) |
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26 |
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27 if ((ngx_event_flags & NGX_HAVE_KQUEUE_EVENT) && wev->kq_eof) { |
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28 ngx_log_error(NGX_LOG_INFO, c->log, wev->kq_errno, |
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29 "kevent() reported about an closed connection"); |
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30 |
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31 wev->error = 1; |
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32 return NGX_CHAIN_ERROR; |
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33 } |
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34 |
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35 #endif |
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36 |
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37 ngx_init_array(io, c->pool, 10, sizeof(struct iovec), NGX_CHAIN_ERROR); |
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38 |
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39 do { |
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40 prev = NULL; |
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41 iov = NULL; |
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42 eintr = 0; |
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43 |
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44 /* create the iovec and coalesce the neighbouring hunks */ |
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45 |
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46 for (cl = in; cl; cl = cl->next) { |
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47 |
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48 if (prev == cl->hunk->pos) { |
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49 iov->iov_len += cl->hunk->last - cl->hunk->pos; |
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50 prev = cl->hunk->last; |
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51 |
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52 } else { |
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53 ngx_test_null(iov, ngx_push_array(&io), NGX_CHAIN_ERROR); |
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54 iov->iov_base = (void *) cl->hunk->pos; |
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55 iov->iov_len = cl->hunk->last - cl->hunk->pos; |
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56 prev = cl->hunk->last; |
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57 } |
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58 } |
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59 |
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60 n = writev(c->fd, io.elts, io.nelts); |
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61 |
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62 if (n == -1) { |
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63 err = ngx_errno; |
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64 |
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65 if (err == NGX_EAGAIN || err == NGX_EINTR) { |
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66 if (err == NGX_EINTR) { |
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67 eintr = 1; |
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68 } |
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69 |
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70 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, |
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71 "writev() not ready"); |
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72 |
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73 } else { |
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74 wev->error = 1; |
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75 ngx_connection_error(c, err, "writev() failed"); |
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76 return NGX_CHAIN_ERROR; |
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77 } |
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78 } |
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79 |
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80 sent = n > 0 ? n : 0; |
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81 |
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82 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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83 "writev: " OFF_T_FMT, sent); |
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84 |
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85 c->sent += sent; |
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86 |
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87 for (cl = in; cl && sent > 0; cl = cl->next) { |
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88 |
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89 size = cl->hunk->last - cl->hunk->pos; |
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90 |
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91 if (sent >= size) { |
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92 sent -= size; |
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93 |
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94 if (cl->hunk->type & NGX_HUNK_IN_MEMORY) { |
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95 cl->hunk->pos = cl->hunk->last; |
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96 } |
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97 |
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98 continue; |
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99 } |
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100 |
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101 if (cl->hunk->type & NGX_HUNK_IN_MEMORY) { |
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nginx-0.0.1-2003-11-27-22:01:37 import
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102 cl->hunk->pos += sent; |
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nginx-0.0.1-2003-11-27-22:01:37 import
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103 } |
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nginx-0.0.1-2003-11-27-22:01:37 import
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104 |
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nginx-0.0.1-2003-11-27-22:01:37 import
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105 break; |
93
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nginx-0.0.1-2003-05-21-17:28:21 import
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106 } |
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nginx-0.0.1-2003-05-21-17:28:21 import
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107 |
198
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nginx-0.0.1-2003-11-27-22:01:37 import
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108 } while (eintr); |
93
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109 |
198
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nginx-0.0.1-2003-11-27-22:01:37 import
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110 if (cl) { |
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nginx-0.0.1-2003-11-27-22:01:37 import
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111 wev->ready = 0; |
93
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nginx-0.0.1-2003-05-21-17:28:21 import
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112 } |
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nginx-0.0.1-2003-05-21-17:28:21 import
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parents:
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113 |
170
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
144
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114 return cl; |
93
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nginx-0.0.1-2003-05-21-17:28:21 import
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115 } |