Merging r4195, r4196: AIO related fixes: *) Fix for connection drops with AIO. Connections serving content with AIO to fast clients were dropped with "client timed out" messages after send_timeout from response start. *) Fix for socket leak with "aio sendfile" and "limit_rate". Second aio post happened when timer set by limit_rate expired while we have aio request in flight, resulting in "second aio post" alert and socket leak. The patch adds actual protection from aio calls with r->aio already set to aio sendfile code in ngx_http_copy_filter(). This should fix other cases as well, e.g. when sending buffered to disk upstream replies while still talking to upstream. The ngx_http_writer() is also fixed to handle the above case (though it's mostly optimization now).

# Copyright (C) Igor Sysoev


have=NGX_WIN32 . auto/have_headers

CORE_INCS="$WIN32_INCS"
CORE_DEPS="$WIN32_DEPS"
CORE_SRCS="$WIN32_SRCS $IOCP_SRCS"
OS_CONFIG="$WIN32_CONFIG"
CORE_LIBS="$CORE_LIBS advapi32.lib ws2_32.lib"
NGX_ICONS="$NGX_WIN32_ICONS"
SELECT_SRCS=$WIN32_SELECT_SRCS

EVENT_MODULES="$EVENT_MODULES $IOCP_MODULE"
EVENT_FOUND=YES

if [ $EVENT_SELECT = NO ]; then
    CORE_SRCS="$CORE_SRCS $SELECT_SRCS"
    EVENT_MODULES="$EVENT_MODULES $SELECT_MODULE"
fi

if [ $NGX_IPV6 = YES ]; then
    have=NGX_HAVE_INET6 . auto/have
fi

have=NGX_HAVE_AIO . auto/have
have=NGX_HAVE_IOCP . auto/have