/**
 *  Init.h
 *
 *  Variables and structured required by the Zend engine to work
 *  with global variables
 *
 *  @author Emiel Bruijntjes <emiel.bruijntjes@copernica.com>
 *  @copyright 2013 Copernica BV
 */

/**
 *  Namespace
 */
namespace Php {

/**
 *  The way how PHP C API deals with "global" variables is stupid.
 * 
 *  This is supposed to turn into a structure that is going to be 
 *  instantiated for each parallel running request, and for which the 
 *  PHP engine allocates a certain amount of memory, and a magic
 *  pointer that is passed and should be forwarded to every thinkable 
 *  PHP function.
 * 
 *  We don't like this architecture. We have our own environment object
 *  that makes much more sense, and that we use. However, we need
 *  to assign this object somewhere, so that's what we do in this
 *  one and only global variable
 */
ZEND_BEGIN_MODULE_GLOBALS(phpcpp)
ZEND_END_MODULE_GLOBALS(phpcpp)

/**
 *  And now we're going to define a macro. This also is a ridiculous
 *  architecture from PHP to get access to a variable from the 
 *  structure above.
 */
#ifdef ZTS
#define PHPCPP_G(v) TSRMG(phpcpp_globals_id, phpcpp_globals *, v)
#else
#define PHPCPP_G(v) (phpcpp_globals.v)
#endif

/**
 *  We're almost there, we now need to declare an instance of the
 *  structure defined above (if building for a single thread) or some
 *  sort of impossible to understand magic pointer-to-a-pointer (for
 *  multi-threading builds). We make this a static variable because
 *  this already is bad enough.
 */
extern ZEND_DECLARE_MODULE_GLOBALS(phpcpp)

/**
 *  End of namespace
 */
}