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annotate src/os/unix/ngx_aio_read_chain.c @ 4244:df9d3dd8cfc0 stable-1.0

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Merging r4020: SIGWINCH/NOACCEPT signal is disabled now in non-daemon mode. Non-daemon mode is currently used by supervisord, daemontools and so on or during debugging. The NOACCEPT signal is only used for online upgrade which is not supported when nginx is run under supervisord, etc., so this change should not break existant setups.
author Igor Sysoev <igor@sysoev.ru>
date Tue, 01 Nov 2011 11:26:56 +0000
parents a1d54c705f38
children d620f497c50f
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
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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11
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4d9ea73a627a nginx-0.3.10-RELEASE import
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12 ssize_t
4d9ea73a627a nginx-0.3.10-RELEASE import
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13 ngx_aio_read_chain(ngx_connection_t *c, ngx_chain_t *cl)
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14 {
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15 int n;
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4a3f18406832 nginx-0.0.3-2004-03-30-10:27:36 import
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16 u_char *buf, *prev;
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7a8ebba985a9 nginx-0.0.3-2004-04-16-19:27:31 import
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17 size_t size;
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18 ssize_t total;
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20 if (c->read->pending_eof) {
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21 c->read->ready = 0;
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22 return 0;
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23 }
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24
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25 total = 0;
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26
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27 while (cl) {
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28
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29 /* we can post the single aio operation only */
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30
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31 if (!c->read->ready) {
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32 return total ? total : NGX_AGAIN;
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33 }
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34
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35 buf = cl->buf->last;
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36 prev = cl->buf->last;
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37 size = 0;
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38
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39 /* coalesce the neighbouring bufs */
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41 while (cl && prev == cl->buf->last) {
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42 size += cl->buf->end - cl->buf->last;
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43 prev = cl->buf->end;
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44 cl = cl->next;
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45 }
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46
84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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47 n = ngx_aio_read(c, buf, size);
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49 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_read: %d", n);
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51 if (n == NGX_AGAIN) {
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52 return total ? total : NGX_AGAIN;
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53 }
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54
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55 if (n == NGX_ERROR) {
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56 return NGX_ERROR;
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57 }
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58
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59 if (n == 0) {
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60 c->read->pending_eof = 1;
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61 if (total) {
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62 c->read->eof = 0;
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63 c->read->ready = 1;
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64 }
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65 return total;
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66 }
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67
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68 if (n > 0) {
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69 total += n;
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70 }
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72 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
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73 "aio_read total: %d", total);
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74 }
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75
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76 return total ? total : NGX_AGAIN;
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77 }