Mercurial > hg > nginx
annotate src/os/unix/ngx_readv_chain.c @ 164:84036764e215
nginx-0.0.1-2003-10-29-11:30:44 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 29 Oct 2003 08:30:44 +0000 |
parents | fb61ba77beba |
children | 0061d1f0908d |
rev | line source |
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nginx-0.0.1-2003-04-10-19:08:54 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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7 ssize_t ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain) |
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8 { |
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9 char *prev; |
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10 ssize_t n, size; |
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11 struct iovec *iov; |
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12 ngx_err_t err; |
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13 ngx_array_t io; |
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15 prev = NULL; |
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16 iov = NULL; |
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17 size = 0; |
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19 ngx_init_array(io, c->pool, 10, sizeof(struct iovec), NGX_ERROR); |
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21 /* coalesce the neighbouring hunks */ |
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23 while (chain) { |
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24 if (prev == chain->hunk->last) { |
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25 iov->iov_len += chain->hunk->end - chain->hunk->last; |
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26 |
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27 } else { |
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28 ngx_test_null(iov, ngx_push_array(&io), NGX_ERROR); |
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29 iov->iov_base = chain->hunk->last; |
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30 iov->iov_len = chain->hunk->end - chain->hunk->last; |
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31 } |
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33 size += chain->hunk->end - chain->hunk->last; |
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34 prev = chain->hunk->end; |
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35 chain = chain->next; |
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36 } |
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38 ngx_log_debug(c->log, "recv: %d:%d" _ io.nelts _ iov->iov_len); |
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40 n = readv(c->fd, (struct iovec *) io.elts, io.nelts); |
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41 |
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42 if (n == 0) { |
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43 c->read->eof = 1; |
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44 |
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45 } else if (n == -1) { |
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46 c->read->ready = 0; |
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47 |
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48 err = ngx_errno; |
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49 if (err == NGX_EAGAIN) { |
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50 ngx_log_error(NGX_LOG_INFO, c->log, err, "readv() returned EAGAIN"); |
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51 return NGX_AGAIN; |
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52 } |
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54 c->read->error = 1; |
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55 ngx_log_error(NGX_LOG_ERR, c->log, err, "readv() failed"); |
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56 return NGX_ERROR; |
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57 |
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58 } else if (n < size) { |
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59 c->read->ready = 0; |
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60 } |
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61 |
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62 return n; |
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63 } |