Mercurial > hg > nginx

annotate src/os/unix/ngx_writev_chain.c @ 93:738fe44c70d5

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nginx-0.0.1-2003-05-21-17:28:21 import
author Igor Sysoev <igor@sysoev.ru>
date Wed, 21 May 2003 13:28:21 +0000
parents
children 8220378432a8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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93
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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1
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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2 #include <ngx_config.h>
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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3 #include <ngx_core.h>
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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4
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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5
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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6 ngx_chain_t *ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in)
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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7 {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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8 char *prev;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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9 size_t size;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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10 ssize_t n;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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11 off_t sent;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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12 struct iovec *iov;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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13 ngx_err_t err;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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14 ngx_array_t io;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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15 ngx_chain_t *ce;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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16
738fe44c70d5 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);
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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18
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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19 prev = NULL;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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20 iov = NULL;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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21
738fe44c70d5 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 */
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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23 for (ce = in; ce; ce = ce->next) {
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24
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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25 if (prev == ce->hunk->pos) {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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26 iov->iov_len += ce->hunk->last - ce->hunk->pos;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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27 prev = ce->hunk->last;
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28
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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29 } else {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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30 ngx_test_null(iov, ngx_push_array(&io), NGX_CHAIN_ERROR);
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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31 iov->iov_base = ce->hunk->pos;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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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 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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36
738fe44c70d5 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
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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39 if (n == -1) {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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40 err = ngx_errno;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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41 if (err == NGX_EAGAIN) {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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42 ngx_log_error(NGX_LOG_INFO, c->log, err, "writev() EAGAIN");
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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43
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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44 } else if (err == NGX_EINTR) {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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45 ngx_log_error(NGX_LOG_INFO, c->log, err, "writev() EINTR");
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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46
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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47 } else {
738fe44c70d5 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");
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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49 return NGX_CHAIN_ERROR;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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50 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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51 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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52
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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53 sent = n > 0 ? n : 0;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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54
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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55 #if (NGX_DEBUG_WRITE_CHAIN)
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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56 ngx_log_debug(c->log, "writev: %qd" _ sent);
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57 #endif
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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58
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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59 c->sent += sent;
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60
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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61 for (ce = in; ce && sent > 0; ce = ce->next) {
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62
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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63 size = ce->hunk->last - ce->hunk->pos;
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64
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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65 if (sent >= size) {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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66 sent -= size;
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67
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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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) {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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73 ce->hunk->file_pos = ce->hunk->file_last;
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74 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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75
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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76 continue;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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77 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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78
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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79 if (ce->hunk->type & NGX_HUNK_IN_MEMORY) {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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80 ce->hunk->pos += sent;
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81 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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82
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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83 if (ce->hunk->type & NGX_HUNK_FILE) {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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84 ce->hunk->file_pos += sent;
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85 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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86
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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87 break;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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88 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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89
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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90 ngx_destroy_array(&io);
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91
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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92 return ce;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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93 }