Mercurial > hg > nginx
view src/os/unix/ngx_aio_read_chain.c @ 248:e885208c518b
nginx-0.0.2-2004-02-03-00:19:52 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Mon, 02 Feb 2004 21:19:52 +0000 |
parents | 389d7ee9fa60 |
children | 70e1c7d2b83d |
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#include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #include <ngx_aio.h> ssize_t ngx_aio_read_chain(ngx_connection_t *c, ngx_chain_t *cl) { int n; char *buf, *prev; size_t size, total; ngx_err_t err; if (c->read->aio_eof) { c->read->ready = 0; return 0; } total = 0; while (cl) { /* we can post the single aio operation only */ if (!c->read->ready) { return total ? total : NGX_AGAIN; } buf = cl->hunk->last; prev = cl->hunk->last; size = 0; /* coalesce the neighbouring hunks */ while (cl && prev == cl->hunk->last) { size += cl->hunk->end - cl->hunk->last; prev = cl->hunk->end; cl = cl->next; } n = ngx_aio_read(c, buf, size); ngx_log_debug(c->log, "aio_read: %d" _ n); if (n == NGX_AGAIN) { return total ? total : NGX_AGAIN; } if (n == NGX_ERROR) { return NGX_ERROR; } if (n == 0) { c->read->aio_eof = 1; if (total) { c->read->eof = 0; c->read->ready = 1; } return total; } if (n > 0) { total += n; } ngx_log_debug(c->log, "aio_read total: %d" _ total); } return total ? total : NGX_AGAIN; }