Mercurial > hg > nginx

annotate src/os/unix/ngx_writev_chain.c @ 170:c42be4185301

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
nginx-0.0.1-2003-11-03-01:56:18 import
author Igor Sysoev <igor@sysoev.ru>
date Sun, 02 Nov 2003 22:56:18 +0000
parents ef8c87afcfc5
children 1bf718ce0dde
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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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>
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4 #include <ngx_event.h>
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5
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6
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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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
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8 {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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9 char *prev;
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6dfda4cf5200 nginx-0.0.1-2003-06-11-19:28:34 import
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10 ssize_t n, size;
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11 off_t sent;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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12 struct iovec *iov;
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13 ngx_err_t err;
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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14 ngx_array_t io;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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15 ngx_chain_t *cl;
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16
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17 if (!c->write->ready) {
ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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18 return in;
ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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19 }
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20
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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21 ngx_init_array(io, c->pool, 10, sizeof(struct iovec), NGX_CHAIN_ERROR);
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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23 prev = NULL;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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24 iov = NULL;
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26 /* create the iovec and coalesce the neighbouring hunks */
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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27 for (cl = in; cl; cl = cl->next) {
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28
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29 if (prev == cl->hunk->pos) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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30 iov->iov_len += cl->hunk->last - cl->hunk->pos;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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31 prev = cl->hunk->last;
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32
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33 } else {
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34 ngx_test_null(iov, ngx_push_array(&io), NGX_CHAIN_ERROR);
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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35 iov->iov_base = cl->hunk->pos;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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36 iov->iov_len = cl->hunk->last - cl->hunk->pos;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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37 prev = cl->hunk->last;
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38 }
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39 }
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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41 n = writev(c->fd, io.elts, io.nelts);
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43 if (n == -1) {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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44 err = ngx_errno;
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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45 if (err == NGX_EAGAIN) {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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46 ngx_log_error(NGX_LOG_INFO, c->log, err, "writev() EAGAIN");
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47
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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48 } else if (err == NGX_EINTR) {
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49 ngx_log_error(NGX_LOG_INFO, c->log, err, "writev() EINTR");
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50
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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51 } else {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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52 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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53 return NGX_CHAIN_ERROR;
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54 }
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55 }
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56
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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57 sent = n > 0 ? n : 0;
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58
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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59 #if (NGX_DEBUG_WRITE_CHAIN)
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60 ngx_log_debug(c->log, "writev: %qd" _ sent);
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61 #endif
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62
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63 c->sent += sent;
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65 for (cl = in; cl && sent > 0; cl = cl->next) {
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67 size = cl->hunk->last - cl->hunk->pos;
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69 ngx_log_debug(c->log, "SIZE: %d" _ size);
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70
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71 if (sent >= size) {
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72 sent -= size;
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73
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74 if (cl->hunk->type & NGX_HUNK_IN_MEMORY) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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75 cl->hunk->pos = cl->hunk->last;
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76 }
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8220378432a8 nginx-0.0.1-2003-05-22-19:23:47 import
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78 #if 0
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79 if (cl->hunk->type & NGX_HUNK_FILE) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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80 cl->hunk->file_pos = cl->hunk->file_last;
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81 }
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8220378432a8 nginx-0.0.1-2003-05-22-19:23:47 import
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82 #endif
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83
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84 continue;
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85 }
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86
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87 if (cl->hunk->type & NGX_HUNK_IN_MEMORY) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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88 cl->hunk->pos += sent;
93
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89 }
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90
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8220378432a8 nginx-0.0.1-2003-05-22-19:23:47 import
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91 #if 0
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92 if (cl->hunk->type & NGX_HUNK_FILE) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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93 cl->hunk->file_pos += sent;
93
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94 }
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8220378432a8 nginx-0.0.1-2003-05-22-19:23:47 import
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95 #endif
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96
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97 break;
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98 }
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100 return cl;
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101 }