Re: myext_globals->global_value vs MYEXT_G(global_value)

On Thu, 05 Aug 2010 02:23:05 +0100, j adams <zardozrocks@gmail.com> 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