Mercurial > hg > nginx

annotate src/os/unix/ngx_aio_read_chain.c @ 5914:4dd67e5d958e

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Refactored ngx_solaris_sendfilev_chain(). Though ngx_solaris_sendfilev_chain() shouldn't suffer from the problem mentioned in d1bde5c3c5d2 since currently IOV_MAX on Solaris is 16, but this follows the change from 3d5717550371 in order to make the code look similar to other systems and potentially eliminates the problem in the future.
author Valentin Bartenev <vbart@nginx.com>
date Wed, 19 Nov 2014 21:17:11 +0300
parents ec81934727a1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
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1
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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parents: 375
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2 /*
444
42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
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3 * Copyright (C) Igor Sysoev
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d620f497c50f Copyright updated.
Maxim Konovalov <maxim@nginx.com>
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4 * Copyright (C) Nginx, Inc.
441
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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5 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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6
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84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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10 #include <ngx_event.h>
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11
84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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12
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4d9ea73a627a nginx-0.3.10-RELEASE import
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13 ssize_t
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14 ngx_aio_read_chain(ngx_connection_t *c, ngx_chain_t *cl, off_t limit)
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84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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15 {
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16 int n;
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4a3f18406832 nginx-0.0.3-2004-03-30-10:27:36 import
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17 u_char *buf, *prev;
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7a8ebba985a9 nginx-0.0.3-2004-04-16-19:27:31 import
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18 size_t size;
7a8ebba985a9 nginx-0.0.3-2004-04-16-19:27:31 import
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19 ssize_t total;
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744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
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21 if (c->read->pending_eof) {
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22 c->read->ready = 0;
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23 return 0;
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24 }
389d7ee9fa60 nginx-0.0.1-2003-10-30-11:51:06 import
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25
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26 total = 0;
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27
84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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28 while (cl) {
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29
84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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30 /* we can post the single aio operation only */
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31
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32 if (!c->read->ready) {
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33 return total ? total : NGX_AGAIN;
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34 }
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35
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6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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36 buf = cl->buf->last;
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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37 prev = cl->buf->last;
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38 size = 0;
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39
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40 /* coalesce the neighbouring bufs */
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parents: 319
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42 while (cl && prev == cl->buf->last) {
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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parents: 319
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43 size += cl->buf->end - cl->buf->last;
6bdf858bff8c nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
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parents: 319
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44 prev = cl->buf->end;
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45 cl = cl->next;
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46 }
84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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47
84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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48 n = ngx_aio_read(c, buf, size);
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49
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50 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_read: %d", n);
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51
84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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52 if (n == NGX_AGAIN) {
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53 return total ? total : NGX_AGAIN;
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54 }
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55
84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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56 if (n == NGX_ERROR) {
84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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57 return NGX_ERROR;
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58 }
84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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59
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389d7ee9fa60 nginx-0.0.1-2003-10-30-11:51:06 import
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60 if (n == 0) {
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744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
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61 c->read->pending_eof = 1;
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62 if (total) {
389d7ee9fa60 nginx-0.0.1-2003-10-30-11:51:06 import
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63 c->read->eof = 0;
389d7ee9fa60 nginx-0.0.1-2003-10-30-11:51:06 import
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64 c->read->ready = 1;
389d7ee9fa60 nginx-0.0.1-2003-10-30-11:51:06 import
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65 }
389d7ee9fa60 nginx-0.0.1-2003-10-30-11:51:06 import
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66 return total;
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67 }
389d7ee9fa60 nginx-0.0.1-2003-10-30-11:51:06 import
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68
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69 if (n > 0) {
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70 total += n;
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71 }
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72
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73 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
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74 "aio_read total: %d", total);
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75 }
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76
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77 return total ? total : NGX_AGAIN;
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78 }