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annotate src/os/unix/ngx_aio_read_chain.c @ 375:744ccb59062d

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nginx-0.0.7-2004-07-02-19:54:34 import
author Igor Sysoev <igor@sysoev.ru>
date Fri, 02 Jul 2004 15:54:34 +0000
parents 6bdf858bff8c
children da8c5707af39
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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1
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2 #include <ngx_config.h>
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3 #include <ngx_core.h>
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4 #include <ngx_event.h>
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5 #include <ngx_aio.h>
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8 ssize_t ngx_aio_read_chain(ngx_connection_t *c, ngx_chain_t *cl)
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9 {
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10 int n;
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4a3f18406832 nginx-0.0.3-2004-03-30-10:27:36 import
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11 u_char *buf, *prev;
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7a8ebba985a9 nginx-0.0.3-2004-04-16-19:27:31 import
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12 size_t size;
7a8ebba985a9 nginx-0.0.3-2004-04-16-19:27:31 import
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13 ssize_t total;
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14 ngx_err_t err;
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16 if (c->read->pending_eof) {
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17 c->read->ready = 0;
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18 return 0;
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19 }
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20
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21 total = 0;
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22
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23 while (cl) {
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24
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25 /* we can post the single aio operation only */
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26
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27 if (!c->read->ready) {
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28 return total ? total : NGX_AGAIN;
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29 }
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30
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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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31 buf = cl->buf->last;
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32 prev = cl->buf->last;
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33 size = 0;
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34
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35 /* coalesce the neighbouring bufs */
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37 while (cl && prev == cl->buf->last) {
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38 size += cl->buf->end - cl->buf->last;
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39 prev = cl->buf->end;
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40 cl = cl->next;
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41 }
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84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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43 n = ngx_aio_read(c, buf, size);
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44
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45 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_read: %d", n);
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47 if (n == NGX_AGAIN) {
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48 return total ? total : NGX_AGAIN;
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49 }
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50
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51 if (n == NGX_ERROR) {
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52 return NGX_ERROR;
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53 }
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54
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55 if (n == 0) {
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744ccb59062d nginx-0.0.7-2004-07-02-19:54:34 import
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56 c->read->pending_eof = 1;
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57 if (total) {
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58 c->read->eof = 0;
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59 c->read->ready = 1;
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60 }
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61 return total;
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62 }
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63
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64 if (n > 0) {
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65 total += n;
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66 }
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68 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
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69 "aio_read total: %d", total);
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70 }
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72 return total ? total : NGX_AGAIN;
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73 }