GyotoError.h File Reference

Error handling. More...

#include <string>
#include "GyotoDefs.h"

Go to the source code of this file.

Classes
class	Gyoto::Error
	Class for thowing exceptions. More...

Namespaces
	Gyoto
	Namespace for the Gyoto library.

Macros
#define	GYOTO_ERROR(msg)   Gyoto::throwError(std::string(__FILE__ ":" GYOTO_STRINGIFY(__LINE__) " in ")+ __PRETTY_FUNCTION__ + ": " + msg)
	Throw a Gyoto::Error nicely. More...

Functions
void	Gyoto::throwError (std::string)
	Throw a Gyoto::Error. More...

Detailed Description

Error handling.

Gyoto dlopens its plug-ins. The throw/catch C++ mechanism cannot pass the dlopen boundary. The Gyoto::Error mechanism alleviates this C++ language limitation.

Every Gyoto method (either in the main Gyoto library or in a Gyoto plug-in) should check for possible error conditions and throw adequate Gyoto::Error exceptions through the Gyoto::Error::throw() function. For instance:

if (error_condition) Gyoto::Error::throw("Useful error message");

If the main code has set Gyoto::Error::handler_t error handler using Gyoto::Error::setHandler(), these errors will then be passed to it. Else, the Error is C++-thrown at the main Gyoto library level, above the dlopen boundary.

The main code can then catch these exceptions and act appropriately, for instance:

try { gyoto_code ; }
catch (Gyoto::Error err)
{
   err.Report();
   abort();
}

Macro Definition Documentation

GYOTO_ERROR

#define GYOTO_ERROR

(

msg

)

Gyoto::throwError(std::string(__FILE__ ":" GYOTO_STRINGIFY(__LINE__) " in ")+ __PRETTY_FUNCTION__ + ": " + msg)

Throw a Gyoto::Error nicely.

Throw an Error, prepending current function name. Calls Gyoto::throwError(std::string).