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annotate src/os/unix/ngx_aio_write_chain.c @ 343:6bdf858bff8c

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nginx-0.0.3-2004-05-28-19:49:23 import; rename ngx_hunk_t to ngx_buf_t
author Igor Sysoev <igor@sysoev.ru>
date Fri, 28 May 2004 15:49:23 +0000
parents 4a3f18406832
children 7650aea1816f
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36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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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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36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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8 ngx_chain_t *ngx_aio_write_chain(ngx_connection_t *c, ngx_chain_t *in)
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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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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12 off_t sent;
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13 size_t size;
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14 ngx_err_t err;
84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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15 ngx_chain_t *cl;
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17 sent = 0;
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18 cl = in;
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20 while (cl) {
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22 if (cl->buf->last - cl->buf->pos == 0) {
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23 cl = cl->next;
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24 continue;
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25 }
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27 /* we can post the single aio operation only */
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28
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389d7ee9fa60 nginx-0.0.1-2003-10-30-11:51:06 import
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29 if (!c->write->ready) {
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30 return cl;
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31 }
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32
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33 buf = cl->buf->pos;
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34 prev = buf;
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35 size = 0;
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37 /* coalesce the neighbouring bufs */
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39 while (cl && prev == cl->buf->pos) {
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40 size += cl->buf->last - cl->buf->pos;
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41 prev = cl->buf->last;
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42 cl = cl->next;
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43 }
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44
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84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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45 n = ngx_aio_write(c, buf, size);
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47 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_write: %d", n);
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49 if (n == NGX_ERROR) {
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ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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50 return NGX_CHAIN_ERROR;
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51 }
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53 if (n > 0) {
84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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54 sent += n;
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55 c->sent += n;
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56 }
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58 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
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59 "aio_write sent: " OFF_T_FMT, c->sent);
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61 for (cl = in; cl; cl = cl->next) {
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63 if (sent >= cl->buf->last - cl->buf->pos) {
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64 sent -= cl->buf->last - cl->buf->pos;
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65 cl->buf->pos = cl->buf->last;
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67 continue;
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68 }
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70 cl->buf->pos += sent;
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72 break;
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73 }
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74 }
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76 return cl;
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77 }