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GObject Introspection Reference Manual | ![]() |
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Top | Description |
typedef GIArgInfo; enum GIDirection; enum GIScopeType; enum GITransfer; GIDirection g_arg_info_get_direction (GIArgInfo *info
); gboolean g_arg_info_is_return_value (GIArgInfo *info
); gboolean g_arg_info_is_optional (GIArgInfo *info
); gboolean g_arg_info_may_be_null (GIArgInfo *info
); GITransfer g_arg_info_get_ownership_transfer (GIArgInfo *info
); GIScopeType g_arg_info_get_scope (GIArgInfo *info
); gint g_arg_info_get_closure (GIArgInfo *info
); gint g_arg_info_get_destroy (GIArgInfo *info
); GITypeInfo * g_arg_info_get_type (GIArgInfo *info
); void g_arg_info_load_type (GIArgInfo *info
,GITypeInfo *type
);
typedef enum { GI_DIRECTION_IN, GI_DIRECTION_OUT, GI_DIRECTION_INOUT } GIDirection;
The direction of a GIArgInfo.
typedef enum { GI_SCOPE_TYPE_INVALID, GI_SCOPE_TYPE_CALL, GI_SCOPE_TYPE_ASYNC, GI_SCOPE_TYPE_NOTIFIED } 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.
The argument is not of callback type. | |
The callback and associated user_data is only used during the call to this function. | |
The callback and associated user_data is only used until the callback is invoked, and the callback. is invoked always exactly once. | |
The callback and and associated user_data is used until the caller is notfied via the destroy_notify. |
typedef enum { GI_TRANSFER_NOTHING, GI_TRANSFER_CONTAINER, GI_TRANSFER_EVERYTHING } GITransfer;
Represent the transfer ownership information of a GICallableInfo or a GIArgInfo.
GIDirection g_arg_info_get_direction (GIArgInfo *info
);
Obtain the direction of the argument. Check GIDirection for possible direction values.
|
a GIArgInfo |
Returns : |
the direction |
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.
|
a GIArgInfo |
Returns : |
TRUE if it is a return value
|
gboolean g_arg_info_is_optional (GIArgInfo *info
);
Obtain if the argument is optional.
|
a GIArgInfo |
Returns : |
TRUE if it is an optional argument
|
gboolean g_arg_info_may_be_null (GIArgInfo *info
);
Obtain if the argument accepts NULL
.
|
a GIArgInfo |
Returns : |
TRUE if it accepts NULL
|
GITransfer g_arg_info_get_ownership_transfer (GIArgInfo *info
);
Obtain the ownership transfer for this argument. GITransfer contains a list of possible values.
|
a GIArgInfo |
Returns : |
the transfer |
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.
|
a GIArgInfo |
Returns : |
the scope type |
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.
|
a GIArgInfo |
Returns : |
index of the user data argument or -1 if there is none |
gint g_arg_info_get_destroy (GIArgInfo *info
);
Obtains the index of the GDestroyNotify argument. This is only valid for arguments which are callbacks.
|
a GIArgInfo |
Returns : |
index of the GDestroyNotify argument or -1 if there is none |
GITypeInfo * g_arg_info_get_type (GIArgInfo *info
);
Obtain the type information for info
.
|
a GIArgInfo |
Returns : |
the GIArgInfo, free it with
g_base_info_unref() when done. [transfer full]
|
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.
|
a GIArgInfo |
|
Initialized with information about type of info . [out caller-allocates]
|