GI_IS_ARG_INFO()

#define             GI_IS_ARG_INFO(info)

Checks if info is a GIArgInfo.

g_arg_info_get_closure ()

gint
g_arg_info_get_closure (GIArgInfo *info);

Obtain the index of the user data argument. This is only valid for arguments which are callbacks.

g_arg_info_get_destroy ()

gint
g_arg_info_get_destroy (GIArgInfo *info);

Obtains the index of the GDestroyNotify argument. This is only valid for arguments which are callbacks.

g_arg_info_get_direction ()

GIDirection
g_arg_info_get_direction (GIArgInfo *info);

Obtain the direction of the argument. Check GIDirection for possible direction values.

g_arg_info_get_ownership_transfer ()

GITransfer
g_arg_info_get_ownership_transfer (GIArgInfo *info);

Obtain the ownership transfer for this argument. GITransfer contains a list of possible values.

g_arg_info_get_scope ()

GIScopeType
g_arg_info_get_scope (GIArgInfo *info);

Obtain the scope type for this argument. The scope type explains how a callback is going to be invoked, most importantly when the resources required to invoke it can be freed. GIScopeType contains a list of possible values.

g_arg_info_get_type ()

GITypeInfo *
g_arg_info_get_type (GIArgInfo *info);

Obtain the type information for info .

g_arg_info_load_type ()

void
g_arg_info_load_type (GIArgInfo *info,
                      GITypeInfo *type);

Obtain information about a the type of given argument info ; this function is a variant of g_arg_info_get_type() designed for stack allocation.

The initialized type must not be referenced after info is deallocated.

g_arg_info_may_be_null ()

gboolean
g_arg_info_may_be_null (GIArgInfo *info);

Obtain if the type of the argument includes the possibility of NULL. For 'in' values this means that NULL is a valid value. For 'out' values, this means that NULL may be returned.

See also g_arg_info_is_optional().

g_arg_info_is_caller_allocates ()

gboolean
g_arg_info_is_caller_allocates (GIArgInfo *info);

Obtain if the argument is a pointer to a struct or object that will receive an output of a function. The default assumption for GI_DIRECTION_OUT arguments which have allocation is that the callee allocates; if this is TRUE, then the caller must allocate.

g_arg_info_is_optional ()

gboolean
g_arg_info_is_optional (GIArgInfo *info);

Obtain if the argument is optional. For 'out' arguments this means that you can pass NULL in order to ignore the result.

g_arg_info_is_return_value ()

gboolean
g_arg_info_is_return_value (GIArgInfo *info);

Obtain if the argument is a return value. It can either be a parameter or a return value.

g_arg_info_is_skip ()

gboolean
g_arg_info_is_skip (GIArgInfo *info);

Obtain if an argument is only useful in C.

Since: 1.30

GIArgInfo

typedef GIBaseInfo GIArgInfo;

Represents an argument.

enum GIDirection

The direction of a GIArgInfo.

enum GIScopeType

Scope type of a GIArgInfo representing callback, determines how the callback is invoked and is used to decided when the invoke structs can be freed.

enum GITransfer

The transfer is the exchange of data between two parts, from the callee to the caller. The callee is either a function/method/signal or an object/interface where a property is defined. The caller is the side accessing a property or calling a function. GITransfer specifies who's responsible for freeing the resources after the ownership transfer is complete. In case of a containing type such as a list, an array or a hash table the container itself is specified differently from the items within the container itself. Each container is freed differently, check the documentation for the types themselves for information on how to free them.