Mercurial > hg > nginx-vendor-1-0
view src/os/unix/ngx_aio_read_chain.c @ 270:6eb1e38f0f1f NGINX_0_5_5
nginx 0.5.5
*) Change: the -v switch does not show compiler information any more.
*) Feature: the -V switch.
*) Feature: the "worker_rlimit_core" directive supports size in K, M,
and G.
*) Bugfix: the nginx.pm module now could be installed by an
unprivileged user.
*) Bugfix: a segmentation fault might occur if the $r->request_body or
$r->request_body_file methods were used.
*) Bugfix: the ppc platform specific bugs.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Sun, 24 Dec 2006 00:00:00 +0300 |
parents | df17fbafec8f |
children | 86dad910eeb6 |
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/* * Copyright (C) Igor Sysoev */ #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; u_char *buf, *prev; size_t size; ssize_t total; if (c->read->pending_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->buf->last; prev = cl->buf->last; size = 0; /* coalesce the neighbouring bufs */ while (cl && prev == cl->buf->last) { size += cl->buf->end - cl->buf->last; prev = cl->buf->end; cl = cl->next; } n = ngx_aio_read(c, buf, size); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "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->pending_eof = 1; if (total) { c->read->eof = 0; c->read->ready = 1; } return total; } if (n > 0) { total += n; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_read total: %d", total); } return total ? total : NGX_AGAIN; }