Mercurial > hg > nginx

annotate src/os/unix/ngx_aio_write_chain.c @ 164:84036764e215

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nginx-0.0.1-2003-10-29-11:30:44 import
author Igor Sysoev <igor@sysoev.ru>
date Wed, 29 Oct 2003 08:30:44 +0000
parents ef8c87afcfc5
children 389d7ee9fa60
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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>
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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)
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9 {
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84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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10 int n;
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11 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->hunk->last - cl->hunk->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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29 if (c->write->active) {
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30 return cl;
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31 }
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32
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33 buf = cl->hunk->pos;
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34 prev = buf;
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35 size = 0;
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36
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37 /* coalesce the neighbouring hunks */
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39 while (cl && prev == cl->hunk->pos) {
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40 size += cl->hunk->last - cl->hunk->pos;
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41 prev = cl->hunk->last;
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42 cl = cl->next;
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43 }
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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 #if (NGX_DEBUG_WRITE_CHAIN)
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48 ngx_log_debug(c->log, "aio_write: %d" _ n);
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49 #endif
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51 if (n == NGX_ERROR) {
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ef8c87afcfc5 nginx-0.0.1-2003-10-12-20:49:16 import
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52 return NGX_CHAIN_ERROR;
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53 }
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55 if (n > 0) {
84036764e215 nginx-0.0.1-2003-10-29-11:30:44 import
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56 sent += n;
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57 c->sent += n;
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58 }
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60 #if (NGX_DEBUG_WRITE_CHAIN)
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61 ngx_log_debug(c->log, "aio_write sent: " OFF_FMT _ c->sent);
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62 #endif
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64 for (cl = in; cl; cl = cl->next) {
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66 if (sent >= cl->hunk->last - cl->hunk->pos) {
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67 sent -= cl->hunk->last - cl->hunk->pos;
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68 cl->hunk->pos = cl->hunk->last;
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70 continue;
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71 }
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73 cl->hunk->pos += sent;
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74
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75 break;
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76 }
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77 }
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79 return cl;
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80 }