Struct _GParamSpecTypeInfo

#[repr(C)]
pub struct _GParamSpecTypeInfo {
    pub instance_size: guint16,
    pub n_preallocs: guint16,
    pub instance_init: Option<unsafe extern "C" fn(pspec: *mut GParamSpec)>,
    pub value_type: GType,
    pub finalize: Option<unsafe extern "C" fn(pspec: *mut GParamSpec)>,
    pub value_set_default: Option<unsafe extern "C" fn(pspec: *mut GParamSpec, value: *mut GValue)>,
    pub value_validate: Option<unsafe extern "C" fn(pspec: *mut GParamSpec, value: *mut GValue) -> gboolean>,
    pub values_cmp: Option<unsafe extern "C" fn(pspec: *mut GParamSpec, value1: *const GValue, value2: *const GValue) -> gint>,
}

GParamSpecTypeInfo: @instance_size: Size of the instance (object) structure. @n_preallocs: 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. @instance_init: Location of the instance initialization function (optional). @value_type: The #GType of values conforming to this #GParamSpec @finalize: The instance finalization function (optional). @value_set_default: Resets a @value to the default value for @pspec (recommended, the default is g_value_reset()), see g_param_value_set_default(). @value_validate: Ensures that the contents of @value comply with the specifications set out by @pspec (optional), see g_param_value_validate(). @values_cmp: Compares @value1 with @value2 according to @pspec (recommended, the default is memcmp()), see g_param_values_cmp().

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

The initialized structure is passed to the g_param_type_register_static() The type system will perform a deep copy of this structure, so its memory does not need to be persistent across invocation of g_param_type_register_static().

Fields

instance_size: guint16

n_preallocs: guint16

instance_init: Option<unsafe extern "C" fn(pspec: *mut GParamSpec)>

value_type: GType

finalize: Option<unsafe extern "C" fn(pspec: *mut GParamSpec)>

value_set_default: Option<unsafe extern "C" fn(pspec: *mut GParamSpec, value: *mut GValue)>

value_validate: Option<unsafe extern "C" fn(pspec: *mut GParamSpec, value: *mut GValue) -> gboolean>

values_cmp: Option<unsafe extern "C" fn(pspec: *mut GParamSpec, value1: *const GValue, value2: *const GValue) -> gint>

Trait Implementations

impl Clone for _GParamSpecTypeInfo

fn clone(&self) -> _GParamSpecTypeInfo

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for _GParamSpecTypeInfo

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for _GParamSpecTypeInfo

fn eq(&self, other: &_GParamSpecTypeInfo) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for _GParamSpecTypeInfo

impl Eq for _GParamSpecTypeInfo

impl StructuralPartialEq for _GParamSpecTypeInfo