Mercurial > hg > nginx

annotate src/os/unix/ngx_writev_chain.c @ 198:34995c5ec6c4

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
nginx-0.0.1-2003-11-27-22:01:37 import
author Igor Sysoev <igor@sysoev.ru>
date Thu, 27 Nov 2003 19:01:37 +0000
parents 8dee38ea9117
children 70e1c7d2b83d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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>
parents:
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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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parents:
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3 #include <ngx_core.h>
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ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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parents: 103
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4 #include <ngx_event.h>
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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5
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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6
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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7 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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8 {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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9 char *prev;
103
6dfda4cf5200 nginx-0.0.1-2003-06-11-19:28:34 import
Igor Sysoev <igor@sysoev.ru>
parents: 94
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10 ssize_t n, size;
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
Igor Sysoev <igor@sysoev.ru>
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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;
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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13 ngx_int_t eintr;
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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14 ngx_err_t err;
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 144
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15 ngx_array_t io;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
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16 ngx_chain_t *cl;
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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17 ngx_event_t *wev;
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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18
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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19 wev = c->write;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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20
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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21 if (!wev->ready) {
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ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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22 return in;
ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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23 }
ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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24
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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25 ngx_init_array(io, c->pool, 10, sizeof(struct iovec), NGX_CHAIN_ERROR);
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26
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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27 do {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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28 prev = NULL;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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29 iov = NULL;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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30 eintr = 0;
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31
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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32 /* create the iovec and coalesce the neighbouring hunks */
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1bf718ce0dde nginx-0.0.1-2003-11-14-10:20:34 import
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33
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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34 for (cl = in; cl; cl = cl->next) {
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35
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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36 if (prev == cl->hunk->pos) {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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parents: 195
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37 iov->iov_len += cl->hunk->last - cl->hunk->pos;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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parents: 195
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38 prev = cl->hunk->last;
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39
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40 } else {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
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41 ngx_test_null(iov, ngx_push_array(&io), NGX_CHAIN_ERROR);
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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parents: 195
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42 iov->iov_base = cl->hunk->pos;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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parents: 195
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43 iov->iov_len = cl->hunk->last - cl->hunk->pos;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
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44 prev = cl->hunk->last;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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45 }
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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
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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48 n = writev(c->fd, io.elts, io.nelts);
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49
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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50 if (n == -1) {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
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51 err = ngx_errno;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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parents: 195
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52 if (err == NGX_EAGAIN) {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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parents: 195
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53 ngx_log_error(NGX_LOG_INFO, c->log, err, "writev() EAGAIN");
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54
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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55 } else if (err == NGX_EINTR) {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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56 eintr = 1;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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57 ngx_log_error(NGX_LOG_INFO, c->log, err, "writev() EINTR");
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58
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59 } else {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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60 wev->error = 1;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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61 ngx_log_error(NGX_LOG_CRIT, c->log, err, "writev() failed");
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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62 return NGX_CHAIN_ERROR;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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63 }
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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64 }
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65
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66 sent = n > 0 ? n : 0;
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67
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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68 #if (NGX_DEBUG_WRITE_CHAIN)
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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69 ngx_log_debug(c->log, "writev: " OFF_T_FMT _ sent);
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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70 #endif
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71
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72 c->sent += sent;
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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73
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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74 for (cl = in; cl && sent > 0; cl = cl->next) {
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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76 size = cl->hunk->last - cl->hunk->pos;
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8220378432a8 nginx-0.0.1-2003-05-22-19:23:47 import
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78 ngx_log_debug(c->log, "SIZE: %d" _ size);
8220378432a8 nginx-0.0.1-2003-05-22-19:23:47 import
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79
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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80 if (sent >= size) {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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81 sent -= size;
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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82
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83 if (cl->hunk->type & NGX_HUNK_IN_MEMORY) {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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84 cl->hunk->pos = cl->hunk->last;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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85 }
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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86
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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87 continue;
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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
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90 if (cl->hunk->type & NGX_HUNK_IN_MEMORY) {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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91 cl->hunk->pos += sent;
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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92 }
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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93
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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parents: 195
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94 break;
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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95 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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96
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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97 } while (eintr);
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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98
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34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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99 if (cl) {
34995c5ec6c4 nginx-0.0.1-2003-11-27-22:01:37 import
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100 wev->ready = 0;
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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101 }
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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102
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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103 return cl;
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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104 }