Mercurial > hg > nginx

annotate src/os/unix/ngx_aio_write_chain.c @ 144:ef8c87afcfc5

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nginx-0.0.1-2003-10-12-20:49:16 import
author Igor Sysoev <igor@sysoev.ru>
date Sun, 12 Oct 2003 16:49:16 +0000
parents b48066122884
children 84036764e215
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36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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1
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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2 #include <ngx_config.h>
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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3 #include <ngx_core.h>
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ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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4 #include <ngx_event.h>
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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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 {
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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10 int rc;
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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11 char *buf, *prev;
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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12 off_t sent;
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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13 size_t size;
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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14 ngx_err_t err;
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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15 ngx_chain_t *ce;
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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16
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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17 sent = 0;
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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18 ce = in;
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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20 while (ce) {
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22 /* we can post the single aio operation only */
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23
ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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24 if (c->write->active) {
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25 return ce;
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26 }
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27
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738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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28 buf = prev = ce->hunk->pos;
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36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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29 size = 0;
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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30
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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31 /* coalesce the neighbouring chain entries */
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32
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33 while (ce && prev == ce->hunk->pos) {
738fe44c70d5 nginx-0.0.1-2003-05-21-17:28:21 import
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34 size += ce->hunk->last - ce->hunk->pos;
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35 prev = ce->hunk->last;
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36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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36 ce = ce->next;
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37 }
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38
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39 rc = ngx_aio_write(c, buf, size);
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b48066122884 nginx-0.0.1-2003-05-23-15:53:01 import
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41 #if (NGX_DEBUG_WRITE_CHAIN)
b48066122884 nginx-0.0.1-2003-05-23-15:53:01 import
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42 ngx_log_debug(c->log, "aio_write rc: %d" _ rc);
b48066122884 nginx-0.0.1-2003-05-23-15:53:01 import
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43 #endif
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44
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45 if (rc == NGX_ERROR) {
ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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46 return NGX_CHAIN_ERROR;
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47 }
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48
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49 if (rc > 0) {
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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50 sent += rc;
36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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51 c->sent += rc;
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52 }
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ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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54 #if (NGX_DEBUG_WRITE_CHAIN)
ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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55 ngx_log_debug(c->log, "aio_write sent: " OFF_FMT _ c->sent);
ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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56 #endif
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57
ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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58 for (ce = in; ce; ce = ce->next) {
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59
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60 if (sent >= ce->hunk->last - ce->hunk->pos) {
ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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61 sent -= ce->hunk->last - ce->hunk->pos;
ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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62 ce->hunk->pos = ce->hunk->last;
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63
ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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64 continue;
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65 }
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ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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67 ce->hunk->pos += sent;
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68
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69 break;
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70 }
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71 }
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36d2c25cc9bb nginx-0.0.1-2003-02-26-23:21:43 import
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73 return ce;
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74 }