Re: [PECL-DEV] myext_globals->global_value vs MYEXT_G(global_value)

On Thu, 05 Aug 2010 02:23:05 +0100, j adams <[email protected]> wrote:

> I am wondering about the correct way to deal with global vars when
> writing a PECL extension.

I wrote about this a while back in the wiki.
See http://wiki.php.net/internals/engine#extension_globals

>
> And then initialized in a function I have not yet seen documented in
> any of the 'getting started' materials:
> /* {{{ PHP_GINIT_FUNCTION
> */
> static PHP_GINIT_FUNCTION(json)
> {
>     json_globals->error_code = 0;
> }
> /* }}} */
>
> This json_globals->error_code assignment puzzles me for two reasons.
>
> First, what is this PHP_GINIT_FUNCTION?

It's just a legacy name of ZEND_MODULE_GLOBALS_CTOR_D (I say "legacy"  
because there's a comment saying "for compatibility" before the macro is  
defined).

> It seems to me that a last_error type var should be initiated in a
> MINIT function, no?

I think it's more or less indifferent, but the globals constructor is  
called before the module startup function (and the module shutdown is  
called before the globals destructor).

-- 
Gustavo Lopes