Struct wayland_client::UserData[−][src]

pub struct UserData { /* fields omitted */ }

A wrapper for user data, able to store any type, and correctly handling access from a wrong thread

Implementations

impl UserData[src]

pub const fn new() -> UserData[src]

Create a new UserData instance

pub fn set<T, F>(&self, f: F) where
    T: 'static + Any,
    F: FnOnce() -> T, [src]

Sets the UserData to a given value

The provided closure is called to init the UserData, does nothing is the UserData had already been set.

pub fn set_threadsafe<T, F>(&self, f: F) where
    T: 'static + Send + Sync + Any,
    F: FnOnce() -> T, [src]

Sets the UserData to a given threadsafe value

The provided closure is called to init the UserData, does nothing is the UserData had already been set.

pub fn get<T>(&self) -> Option<&T> where
    T: 'static, [src]

Attempt to access the wrapped user data

Will return None if either:

  • The requested type T does not match the type used for construction
  • This UserData has been created using the non-threadsafe variant and access is attempted from an other thread than the one it was created on

Trait Implementations

impl Drop for UserData[src]

impl Send for UserData[src]

impl Sync for UserData[src]

Auto Trait Implementations

impl !RefUnwindSafe for UserData

impl Unpin for UserData

impl !UnwindSafe for UserData

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized, [src]

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

impl<T> Downcast for T where
    T: Any, [src]

impl<T> DowncastSync for T where
    T: Send + Sync + Any, [src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, [src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.