On Sun, Oct 11, 2009 at 10:33:38PM +0800, bit bull wrote:

> hi, all:
>
> I saw multithread is supported at Nginx SourceCode. But complie
> configure hiden this feature.
>
> I modified some source to open it, then run Nginx. DeathLock(lock
> and lock again) happened, Nginx is Hanging.
>
> I modified two files to solution this problem:
>
> ---------------------------------------------------------------------------------------------------------------------------
> --- nginx-0.8.19/src/event/ngx_event_timer.c 2009-10-11 19:49:04.000000000 +0800
> +++ src/event/ngx_event_timer.c 2009-10-11 18:19:44.000000000 +0800
> @@ -82,11 +82,13 @@
>
> for ( ;; ) {
>
> ngx_mutex_lock(ngx_event_timer_mutex);
>
> root = ngx_event_timer_rbtree.root;
>
> if (root == sentinel) {
> + ngx_mutex_unlock(ngx_event_timer_mutex);
> return;
>
> --- nginx-0.8.19/src/event/modules/ngx_epoll_module.c 2009-10-11
> 19:49:04.000000000 +0800
> +++ src/event/modules/ngx_epoll_module.c 2009-10-11 19:43:56.000000000 +0800
>
> @@ -639,7 +639,10 @@
> ngx_locked_post_event(rev, queue);
>
> } else {
> +
> + ngx_mutex_unlock(ngx_posted_events_mutex);
> rev->handler(rev);
> + ngx_mutex_lock(ngx_posted_events_mutex);
> }
> }
>
> @@ -658,12 +661,15 @@
> ngx_locked_post_event(wev, &ngx_posted_events);
>
> } else {
> +
> + ngx_mutex_unlock(ngx_posted_events_mutex);
> wev->handler(wev);
> + ngx_mutex_lock(ngx_posted_events_mutex);
> }
> }
> }
> ---------------------------------------------------------------------------------------------------------------------------
>
>
> Now it run, and seem no problem (I feeling have some problems yet).
> I what to know why not support multithread in public, have
> other problem in current version?

The threads support in nginx is currently broken and this patch does not
fix it.


--
Igor Sysoev
http://sysoev.ru/en/