From: KUBO Takehiro <kubo@...>
Date: 2009-04-04T18:33:12+09:00
Subject: Re: rb_thread_blocking_region documentation?

Hi,

On Sat, Apr 4, 2009 at 2:40 PM, Roger Pack <rogerpack2005@gmail.com> wrote:
>
>> rb_thread_blocking_region
>> Help highly appreciated!
>
> The only thing I've found helpful was to examine the code where
> EventMachine used it and try and copy that :)
>
> mysqlplus uses it.
>
> http://betterlogic.com/roger/?p=456
> explains it slightly.
> I dunno where the "real" docu for it is, though.

quote from the blog.
> http://github.com/oldmoe/mysqlplus/tree/19_non_gvl_connect/ext/mysql.c
>
> VALUE answer = rb_thread_blocking_region_variable_params(total_params_right_here - 1, &func_pointer, how_many_params_the_function_takes, param1,param2,param3);

As far as I looked in the code, it makes a segmentation fault when the blocking
thread is woken up by Thread#wakeup.
The third parameter of rb_thread_blocking_region_variable_params in the mysql.c
is passed to rb_thread_blocking_region's third parameter. It should be
an unblocking
function, not an integer.