// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT

use ges_sys;
use glib;
use glib::object::Cast;
use glib::object::IsA;
use glib::signal::connect_raw;
use glib::signal::SignalHandlerId;
use glib::translate::*;
#[cfg(any(feature = "v1_18", feature = "dox"))]
use glib::GString;
use glib::StaticType;
use glib::Value;
use glib_sys;
use gobject_sys;
use gst;
use std::boxed::Box as Box_;
use std::mem::transmute;
#[cfg(any(feature = "v1_18", feature = "dox"))]
use std::ptr;
use Timeline;
use TrackElement;
use TrackType;

glib_wrapper! {
    /// A `Track` acts an output source for a `Timeline`. Each one
    /// essentially provides an additional `gst::Pad` for the timeline, with
    /// `Track:restriction-caps` capabilities. Internally, a track
    /// wraps an `nlecomposition` filtered by a `capsfilter`.
    ///
    /// A track will contain a number of `TrackElement`-s, and its role is
    /// to select and activate these elements according to their timings when
    /// the timeline in played. For example, a track would activate a
    /// `Source` when its `TimelineElement:start` is reached by outputting
    /// its data for its `TimelineElement:duration`. Similarly, a
    /// `Operation` would be activated by applying its effect to the source
    /// data, starting from its `TimelineElement:start` time and lasting for
    /// its `TimelineElement:duration`.
    ///
    /// For most users, it will usually be sufficient to add newly created
    /// tracks to a timeline, but never directly add an element to a track.
    /// Whenever a `Clip` is added to a timeline, the clip adds its
    /// elements to the timeline's tracks and assumes responsibility for
    /// updating them.
    ///
    /// # Implements
    ///
    /// [`GESTrackExt`](trait.GESTrackExt.html), [`gst::ElementExt`](../gst/trait.ElementExt.html), [`gst::ObjectExt`](../gst/trait.ObjectExt.html), [`glib::object::ObjectExt`](../glib/object/trait.ObjectExt.html)
    pub struct Track(Object<ges_sys::GESTrack, ges_sys::GESTrackClass, TrackClass>) @extends gst::Element, gst::Object;

    match fn {
        get_type => || ges_sys::ges_track_get_type(),
    }
}

impl Track {
    /// Creates a new track with the given track-type and caps.
    ///
    /// If `type_` is `TrackType::Video`, and `caps` is a subset of
    /// "video/x-raw(ANY)", then a `VideoTrack` is created. This will
    /// automatically choose a gap creation method suitable for video data. You
    /// will likely want to set `Track:restriction-caps` separately. You may
    /// prefer to use the `VideoTrack::new` method instead.
    ///
    /// If `type_` is `TrackType::Audio`, and `caps` is a subset of
    /// "audio/x-raw(ANY)", then a `AudioTrack` is created. This will
    /// automatically choose a gap creation method suitable for audio data, and
    /// will set the `Track:restriction-caps` to the default for
    /// `AudioTrack`. You may prefer to use the `AudioTrack::new` method
    /// instead.
    ///
    /// Otherwise, a plain `Track` is returned. You will likely want to set
    /// the `Track:restriction-caps` and call
    /// `GESTrackExt::set_create_element_for_gap_func` on the returned track.
    /// ## `type_`
    /// The `Track:track-type` for the track
    /// ## `caps`
    /// The `Track:caps` for the track
    ///
    /// # Returns
    ///
    /// A new track.
    pub fn new(type_: TrackType, caps: &gst::Caps) -> Track {
        assert_initialized_main_thread!();
        unsafe { from_glib_none(ges_sys::ges_track_new(type_.to_glib(), caps.to_glib_full())) }
    }
}

pub const NONE_TRACK: Option<&Track> = None;

/// Trait containing all `Track` methods.
///
/// # Implementors
///
/// [`Track`](struct.Track.html)
pub trait GESTrackExt: 'static {
    /// See `GESTrackExt::add_element`, which also gives an error.
    /// ## `object`
    /// The element to add
    ///
    /// # Returns
    ///
    /// `true` if `object` was successfully added to `self`.
    fn add_element<P: IsA<TrackElement>>(&self, object: &P) -> Result<(), glib::error::BoolError>;

    /// Adds the given track element to the track, which takes ownership of the
    /// element.
    ///
    /// Note that this can fail if it would break a configuration rule of the
    /// track's `Timeline`.
    ///
    /// Note that a `TrackElement` can only be added to one track.
    ///
    /// Feature: `v1_18`
    ///
    /// ## `object`
    /// The element to add
    ///
    /// # Returns
    ///
    /// `true` if `object` was successfully added to `self`.
    #[cfg(any(feature = "v1_18", feature = "dox"))]
    fn add_element_full<P: IsA<TrackElement>>(&self, object: &P) -> Result<(), glib::Error>;

    /// Commits all the pending changes for the elements contained in the
    /// track.
    ///
    /// When changes are made to the timing or priority of elements within a
    /// track, they are not directly executed for the underlying
    /// `nlecomposition` and its children. This method will finally execute
    /// these changes so they are reflected in the data output of the track.
    ///
    /// Any pending changes will be executed in the backend. The
    /// `Timeline::commited` signal will be emitted once this has completed.
    ///
    /// Note that `TimelineExt::commit` will call this method on all of its
    /// tracks, so you are unlikely to need to use this directly.
    ///
    /// # Returns
    ///
    /// `true` if pending changes were committed, or `false` if nothing
    /// needed to be committed.
    fn commit(&self) -> bool;

    /// Get the `Track:caps` of the track.
    ///
    /// # Returns
    ///
    /// The caps of `self`.
    fn get_caps(&self) -> Option<gst::Caps>;

    /// Gets the track elements contained in the track. The returned list is
    /// sorted by the element's `TimelineElement:priority` and
    /// `TimelineElement:start`.
    ///
    /// # Returns
    ///
    /// A list of
    /// all the `TrackElement`-s in `self`.
    fn get_elements(&self) -> Vec<TrackElement>;

    /// Gets the `Track:mixing` of the track.
    ///
    /// # Returns
    ///
    /// Whether `self` is mixing.
    fn get_mixing(&self) -> bool;

    /// Gets the `Track:restriction-caps` of the track.
    ///
    /// Feature: `v1_18`
    ///
    ///
    /// # Returns
    ///
    /// The restriction-caps of `self`.
    #[cfg(any(feature = "v1_18", feature = "dox"))]
    fn get_restriction_caps(&self) -> Option<gst::Caps>;

    /// Get the timeline this track belongs to.
    ///
    /// # Returns
    ///
    /// The timeline that `self` belongs to, or `None` if
    /// it does not belong to a timeline.
    fn get_timeline(&self) -> Option<Timeline>;

    /// See `GESTrackExt::remove_element_full`, which also returns an error.
    /// ## `object`
    /// The element to remove
    ///
    /// # Returns
    ///
    /// `true` if `object` was successfully removed from `self`.
    fn remove_element<P: IsA<TrackElement>>(
        &self,
        object: &P,
    ) -> Result<(), glib::error::BoolError>;

    /// Removes the given track element from the track, which revokes
    /// ownership of the element.
    ///
    /// Feature: `v1_18`
    ///
    /// ## `object`
    /// The element to remove
    ///
    /// # Returns
    ///
    /// `true` if `object` was successfully removed from `self`.
    #[cfg(any(feature = "v1_18", feature = "dox"))]
    fn remove_element_full<P: IsA<TrackElement>>(&self, object: &P) -> Result<(), glib::Error>;

    //fn set_create_element_for_gap_func<P: Fn(&Track) -> gst::Element + 'static>(&self, func: P);

    /// Sets the `Track:mixing` for the track.
    /// ## `mixing`
    /// Whether `self` should be mixing
    fn set_mixing(&self, mixing: bool);

    /// Sets the `Track:restriction-caps` for the track.
    ///
    /// > **NOTE**: Restriction caps are **not** taken into account when
    /// > using `Pipeline:mode`=`PipelineFlags::SmartRender`.
    /// ## `caps`
    /// The new restriction-caps for `self`
    fn set_restriction_caps(&self, caps: &gst::Caps);

    /// Informs the track that it belongs to the given timeline. Calling this
    /// does not actually add the track to the timeline. For that, you should
    /// use `TimelineExt::add_track`, which will also take care of informing
    /// the track that it belongs to the timeline. As such, there is no need
    /// for you to call this method.
    fn set_timeline<P: IsA<Timeline>>(&self, timeline: &P);

    /// Updates the `Track:restriction-caps` of the track using the fields
    /// found in the given caps. Each of the `gst::Structure`-s in `caps` is
    /// compared against the existing structure with the same index in the
    /// current `Track:restriction-caps`. If there is no corresponding
    /// existing structure at that index, then the new structure is simply
    /// copied to that index. Otherwise, any fields in the new structure are
    /// copied into the existing structure. This will replace existing values,
    /// and may introduce new ones, but any fields 'missing' in the new
    /// structure are left unchanged in the existing structure.
    ///
    /// For example, if the existing `Track:restriction-caps` are
    /// "video/x-raw, width=480, height=360", and the updating caps is
    /// "video/x-raw, format=I420, width=500; video/x-bayer, width=400", then
    /// the new `Track:restriction-caps` after calling this will be
    /// "video/x-raw, width=500, height=360, format=I420; video/x-bayer,
    /// width=400".
    /// ## `caps`
    /// The caps to update the restriction-caps with
    fn update_restriction_caps(&self, caps: &gst::Caps);

    /// Current duration of the track
    ///
    /// Default value: O
    fn get_property_duration(&self) -> u64;

    /// The `nlecomposition:id` of the underlying `nlecomposition`.
    ///
    /// Feature: `v1_18`
    ///
    #[cfg(any(feature = "v1_18", feature = "dox"))]
    fn get_property_id(&self) -> Option<GString>;

    /// The `nlecomposition:id` of the underlying `nlecomposition`.
    ///
    /// Feature: `v1_18`
    ///
    #[cfg(any(feature = "v1_18", feature = "dox"))]
    fn set_property_id(&self, id: Option<&str>);

    /// The capabilities that specifies the final output format of the
    /// `Track`. For example, for a video track, it would specify the
    /// height, width, framerate and other properties of the stream.
    ///
    /// You may change this property after the track has been added to a
    /// `Timeline`, but it must remain compatible with the track's
    /// `Track:caps`.
    ///
    /// Default value: `GST_CAPS_ANY`.
    fn get_property_restriction_caps(&self) -> Option<gst::Caps>;

    /// The track type of the track. This controls the type of
    /// `TrackElement`-s that can be added to the track. This should
    /// match with the track's `Track:caps`.
    ///
    /// Once a track has been added to a `Timeline`, you should not change
    /// this.
    fn get_property_track_type(&self) -> TrackType;

    /// This signal will be emitted once the changes initiated by
    /// `GESTrackExt::commit` have been executed in the backend. In particular,
    /// this will be emitted whenever the underlying `nlecomposition` has been
    /// committed (see `nlecomposition::commited`).
    fn connect_commited<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;

    /// Will be emitted after a track element is added to the track.
    /// ## `effect`
    /// The element that was added
    fn connect_track_element_added<F: Fn(&Self, &TrackElement) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;

    /// Will be emitted after a track element is removed from the track.
    /// ## `effect`
    /// The element that was removed
    fn connect_track_element_removed<F: Fn(&Self, &TrackElement) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;

    fn connect_property_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;

    #[cfg(any(feature = "v1_18", feature = "dox"))]
    fn connect_property_id_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;

    fn connect_property_mixing_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;

    fn connect_property_restriction_caps_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;
}

impl<O: IsA<Track>> GESTrackExt for O {
    fn add_element<P: IsA<TrackElement>>(&self, object: &P) -> Result<(), glib::error::BoolError> {
        unsafe {
            glib_result_from_gboolean!(
                ges_sys::ges_track_add_element(
                    self.as_ref().to_glib_none().0,
                    object.as_ref().to_glib_none().0
                ),
                "Failed to add element"
            )
        }
    }

    #[cfg(any(feature = "v1_18", feature = "dox"))]
    fn add_element_full<P: IsA<TrackElement>>(&self, object: &P) -> Result<(), glib::Error> {
        unsafe {
            let mut error = ptr::null_mut();
            let _ = ges_sys::ges_track_add_element_full(
                self.as_ref().to_glib_none().0,
                object.as_ref().to_glib_none().0,
                &mut error,
            );
            if error.is_null() {
                Ok(())
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    fn commit(&self) -> bool {
        unsafe { from_glib(ges_sys::ges_track_commit(self.as_ref().to_glib_none().0)) }
    }

    fn get_caps(&self) -> Option<gst::Caps> {
        unsafe { from_glib_none(ges_sys::ges_track_get_caps(self.as_ref().to_glib_none().0)) }
    }

    fn get_elements(&self) -> Vec<TrackElement> {
        unsafe {
            FromGlibPtrContainer::from_glib_full(ges_sys::ges_track_get_elements(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn get_mixing(&self) -> bool {
        unsafe {
            from_glib(ges_sys::ges_track_get_mixing(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    #[cfg(any(feature = "v1_18", feature = "dox"))]
    fn get_restriction_caps(&self) -> Option<gst::Caps> {
        unsafe {
            from_glib_full(ges_sys::ges_track_get_restriction_caps(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn get_timeline(&self) -> Option<Timeline> {
        unsafe {
            from_glib_none(ges_sys::ges_track_get_timeline(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn remove_element<P: IsA<TrackElement>>(
        &self,
        object: &P,
    ) -> Result<(), glib::error::BoolError> {
        unsafe {
            glib_result_from_gboolean!(
                ges_sys::ges_track_remove_element(
                    self.as_ref().to_glib_none().0,
                    object.as_ref().to_glib_none().0
                ),
                "Failed to remove element"
            )
        }
    }

    #[cfg(any(feature = "v1_18", feature = "dox"))]
    fn remove_element_full<P: IsA<TrackElement>>(&self, object: &P) -> Result<(), glib::Error> {
        unsafe {
            let mut error = ptr::null_mut();
            let _ = ges_sys::ges_track_remove_element_full(
                self.as_ref().to_glib_none().0,
                object.as_ref().to_glib_none().0,
                &mut error,
            );
            if error.is_null() {
                Ok(())
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    //fn set_create_element_for_gap_func<P: Fn(&Track) -> gst::Element + 'static>(&self, func: P) {
    //    unsafe { TODO: call ges_sys:ges_track_set_create_element_for_gap_func() }
    //}

    fn set_mixing(&self, mixing: bool) {
        unsafe {
            ges_sys::ges_track_set_mixing(self.as_ref().to_glib_none().0, mixing.to_glib());
        }
    }

    fn set_restriction_caps(&self, caps: &gst::Caps) {
        unsafe {
            ges_sys::ges_track_set_restriction_caps(
                self.as_ref().to_glib_none().0,
                caps.to_glib_none().0,
            );
        }
    }

    fn set_timeline<P: IsA<Timeline>>(&self, timeline: &P) {
        unsafe {
            ges_sys::ges_track_set_timeline(
                self.as_ref().to_glib_none().0,
                timeline.as_ref().to_glib_none().0,
            );
        }
    }

    fn update_restriction_caps(&self, caps: &gst::Caps) {
        unsafe {
            ges_sys::ges_track_update_restriction_caps(
                self.as_ref().to_glib_none().0,
                caps.to_glib_none().0,
            );
        }
    }

    fn get_property_duration(&self) -> u64 {
        unsafe {
            let mut value = Value::from_type(<u64 as StaticType>::static_type());
            gobject_sys::g_object_get_property(
                self.to_glib_none().0 as *mut gobject_sys::GObject,
                b"duration\0".as_ptr() as *const _,
                value.to_glib_none_mut().0,
            );
            value
                .get()
                .expect("Return Value for property `duration` getter")
                .unwrap()
        }
    }

    #[cfg(any(feature = "v1_18", feature = "dox"))]
    fn get_property_id(&self) -> Option<GString> {
        unsafe {
            let mut value = Value::from_type(<GString as StaticType>::static_type());
            gobject_sys::g_object_get_property(
                self.to_glib_none().0 as *mut gobject_sys::GObject,
                b"id\0".as_ptr() as *const _,
                value.to_glib_none_mut().0,
            );
            value.get().expect("Return Value for property `id` getter")
        }
    }

    #[cfg(any(feature = "v1_18", feature = "dox"))]
    fn set_property_id(&self, id: Option<&str>) {
        unsafe {
            gobject_sys::g_object_set_property(
                self.to_glib_none().0 as *mut gobject_sys::GObject,
                b"id\0".as_ptr() as *const _,
                Value::from(id).to_glib_none().0,
            );
        }
    }

    fn get_property_restriction_caps(&self) -> Option<gst::Caps> {
        unsafe {
            let mut value = Value::from_type(<gst::Caps as StaticType>::static_type());
            gobject_sys::g_object_get_property(
                self.to_glib_none().0 as *mut gobject_sys::GObject,
                b"restriction-caps\0".as_ptr() as *const _,
                value.to_glib_none_mut().0,
            );
            value
                .get()
                .expect("Return Value for property `restriction-caps` getter")
        }
    }

    fn get_property_track_type(&self) -> TrackType {
        unsafe {
            let mut value = Value::from_type(<TrackType as StaticType>::static_type());
            gobject_sys::g_object_get_property(
                self.to_glib_none().0 as *mut gobject_sys::GObject,
                b"track-type\0".as_ptr() as *const _,
                value.to_glib_none_mut().0,
            );
            value
                .get()
                .expect("Return Value for property `track-type` getter")
                .unwrap()
        }
    }

    fn connect_commited<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn commited_trampoline<P, F: Fn(&P) + 'static>(
            this: *mut ges_sys::GESTrack,
            f: glib_sys::gpointer,
        ) where
            P: IsA<Track>,
        {
            let f: &F = &*(f as *const F);
            f(&Track::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"commited\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    commited_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_track_element_added<F: Fn(&Self, &TrackElement) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn track_element_added_trampoline<P, F: Fn(&P, &TrackElement) + 'static>(
            this: *mut ges_sys::GESTrack,
            effect: *mut ges_sys::GESTrackElement,
            f: glib_sys::gpointer,
        ) where
            P: IsA<Track>,
        {
            let f: &F = &*(f as *const F);
            f(
                &Track::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(effect),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"track-element-added\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    track_element_added_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_track_element_removed<F: Fn(&Self, &TrackElement) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn track_element_removed_trampoline<
            P,
            F: Fn(&P, &TrackElement) + 'static,
        >(
            this: *mut ges_sys::GESTrack,
            effect: *mut ges_sys::GESTrackElement,
            f: glib_sys::gpointer,
        ) where
            P: IsA<Track>,
        {
            let f: &F = &*(f as *const F);
            f(
                &Track::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(effect),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"track-element-removed\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    track_element_removed_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_property_duration_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_duration_trampoline<P, F: Fn(&P) + 'static>(
            this: *mut ges_sys::GESTrack,
            _param_spec: glib_sys::gpointer,
            f: glib_sys::gpointer,
        ) where
            P: IsA<Track>,
        {
            let f: &F = &*(f as *const F);
            f(&Track::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::duration\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_duration_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[cfg(any(feature = "v1_18", feature = "dox"))]
    fn connect_property_id_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_id_trampoline<P, F: Fn(&P) + 'static>(
            this: *mut ges_sys::GESTrack,
            _param_spec: glib_sys::gpointer,
            f: glib_sys::gpointer,
        ) where
            P: IsA<Track>,
        {
            let f: &F = &*(f as *const F);
            f(&Track::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::id\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_id_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_property_mixing_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_mixing_trampoline<P, F: Fn(&P) + 'static>(
            this: *mut ges_sys::GESTrack,
            _param_spec: glib_sys::gpointer,
            f: glib_sys::gpointer,
        ) where
            P: IsA<Track>,
        {
            let f: &F = &*(f as *const F);
            f(&Track::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::mixing\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_mixing_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_property_restriction_caps_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn notify_restriction_caps_trampoline<P, F: Fn(&P) + 'static>(
            this: *mut ges_sys::GESTrack,
            _param_spec: glib_sys::gpointer,
            f: glib_sys::gpointer,
        ) where
            P: IsA<Track>,
        {
            let f: &F = &*(f as *const F);
            f(&Track::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::restriction-caps\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_restriction_caps_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}