This structure is used to provide the type system with the information required to initialize and destruct (finalize) a type's class and its instances.

The initialized structure is passed to the g_type_register_static() function (or is copied into the provided GTypeInfo structure in the g_type_plugin_complete_type_info()). The type system will perform a deep copy of this structure, so its memory does not need to be persistent across invocation of g_type_register_static().



GBaseFinalizeFunc baseFinalize;

Location of the base finalization function (optional)

GBaseInitFunc baseInit;

Location of the base initialization function (optional)

void* classData;

User-supplied data passed to the class init/finalize functions

GClassFinalizeFunc classFinalize;

Location of the class finalization function for classed and instantiatable types. Location of the default vtable finalization function for interface types. (optional)

GClassInitFunc classInit;

Location of the class initialization function for classed and instantiatable types. Location of the default vtable inititalization function for interface types. (optional) This function is used both to fill in virtual functions in the class or default vtable, and to do type-specific setup such as registering signals and object properties.

ushort classSize;

Size of the class structure (required for interface, classed and instantiatable types)

GInstanceInitFunc instanceInit;

Location of the instance initialization function (optional, for instantiatable types only)

ushort instanceSize;

Size of the instance (object) structure (required for instantiatable types only)

ushort nPreallocs;

Prior to GLib 2.10, it specified the number of pre-allocated (cached) instances to reserve memory for (0 indicates no caching). Since GLib 2.10, it is ignored, since instances are allocated with the [slice allocator][glib-Memory-Slices] now.

GTypeValueTable* valueTable;

A GTypeValueTable function table for generic handling of GValues of this type (usually only useful for fundamental types)