Struct gio::LocalTask

source ·
pub struct LocalTask<V: ValueType> { /* private fields */ }
Expand description

LocalTask provides idiomatic access to gio’s GTask API, for instance by being generic over their value type, while not completely departing from the underlying C API. LocalTask does not require its value to be Send and Sync and thus is useful to to implement gio style asynchronous tasks that run in the glib main loop. If you need to run tasks in threads see the Task type.

The constructors of LocalTask and Task is marked as unsafe because this API does not allow to automatically enforce all the invariants required to be a completely safe abstraction. See the Task type for more details.

Implementations§

source§

impl<V: Into<Value> + ValueType> LocalTask<V>

source

pub unsafe fn new<S, P, Q>( source_object: Option<&S>, cancellable: Option<&P>, callback: Q ) -> Self
where S: IsA<Object>, P: IsA<Cancellable>, Q: FnOnce(LocalTask<V>, Option<&S>) + 'static,

source

pub fn cancellable(&self) -> Option<Cancellable>

source

pub fn is_check_cancellable(&self) -> bool

source

pub fn set_check_cancellable(&self, check_cancellable: bool)

source

pub fn set_name(&self, name: Option<&str>)

Available on crate feature v2_60 only.
source

pub fn set_return_on_cancel(&self, return_on_cancel: bool) -> bool

source

pub fn is_valid( result: &impl IsA<AsyncResult>, source_object: Option<&impl IsA<Object>> ) -> bool

source

pub fn priority(&self) -> Priority

source

pub fn set_priority(&self, priority: Priority)

source

pub fn is_completed(&self) -> bool

source

pub fn context(&self) -> MainContext

source

pub fn name(&self) -> Option<GString>

Available on crate feature v2_60 only.
source

pub fn is_return_on_cancel(&self) -> bool

source

pub fn had_error(&self) -> bool

source

pub fn connect_completed_notify<F>(&self, f: F) -> SignalHandlerId
where F: Fn(&LocalTask<V>) + 'static,

source

pub fn return_error_if_cancelled(&self) -> bool

source

pub fn return_result(self, result: Result<V, Error>)

source

pub fn propagate(self) -> Result<V, Error>

Trait Implementations§

source§

impl<V: ValueType> Clone for LocalTask<V>

source§

fn clone(&self) -> Self

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
source§

impl<V: ValueType> Debug for LocalTask<V>

source§

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

Formats the value using the given formatter. Read more
source§

impl<V: ValueType> Display for LocalTask<V>

source§

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

Formats the value using the given formatter. Read more
source§

impl<V: ValueType> HasParamSpec for LocalTask<V>

§

type ParamSpec = ParamSpecObject

§

type SetValue = LocalTask<V>

Preferred value to be used as setter for the associated ParamSpec.
§

type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, LocalTask<V>>

source§

fn param_spec_builder() -> Self::BuilderFn

source§

impl<V: ValueType> Hash for LocalTask<V>

source§

fn hash<H>(&self, state: &mut H)
where H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
source§

impl<V: ValueType> Ord for LocalTask<V>

source§

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
source§

impl<V: ValueType> ParentClassIs for LocalTask<V>

source§

impl<OT: ObjectType, V: ValueType> PartialEq<OT> for LocalTask<V>

source§

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

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source§

impl<OT: ObjectType, V: ValueType> PartialOrd<OT> for LocalTask<V>

source§

fn partial_cmp(&self, other: &OT) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

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

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

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

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
1.0.0 · source§

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

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

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

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
source§

impl<V: ValueType> StaticType for LocalTask<V>

source§

fn static_type() -> Type

Returns the type identifier of Self.
source§

impl<V: ValueType> Eq for LocalTask<V>

source§

impl<V: ValueType> IsA<AsyncResult> for LocalTask<V>

Auto Trait Implementations§

§

impl<V> RefUnwindSafe for LocalTask<V>
where V: RefUnwindSafe,

§

impl<V> !Send for LocalTask<V>

§

impl<V> !Sync for LocalTask<V>

§

impl<V> Unpin for LocalTask<V>
where V: Unpin,

§

impl<V> UnwindSafe for LocalTask<V>
where V: UnwindSafe,

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<O> AsyncResultExt for O
where O: IsA<AsyncResult>,

source§

fn source_object(&self) -> Option<Object>

Gets the source object from a AsyncResult. Read more
source§

fn legacy_propagate_error(&self) -> Result<(), Error>

If self is a GSimpleAsyncResult, this is equivalent to g_simple_async_result_propagate_error(). Otherwise it returns false. Read more
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> Cast for T
where T: ObjectType,

source§

fn upcast<T>(self) -> T
where T: ObjectType, Self: IsA<T>,

Upcasts an object to a superclass or interface T. Read more
source§

fn upcast_ref<T>(&self) -> &T
where T: ObjectType, Self: IsA<T>,

Upcasts an object to a reference of its superclass or interface T. Read more
source§

fn downcast<T>(self) -> Result<T, Self>
where T: ObjectType, Self: MayDowncastTo<T>,

Tries to downcast to a subclass or interface implementor T. Read more
source§

fn downcast_ref<T>(&self) -> Option<&T>
where T: ObjectType, Self: MayDowncastTo<T>,

Tries to downcast to a reference of its subclass or interface implementor T. Read more
source§

fn dynamic_cast<T>(self) -> Result<T, Self>
where T: ObjectType,

Tries to cast to an object of type T. This handles upcasting, downcasting and casting between interface and interface implementors. All checks are performed at runtime, while upcast will do many checks at compile-time already. downcast will perform the same checks at runtime as dynamic_cast, but will also ensure some amount of compile-time safety. Read more
source§

fn dynamic_cast_ref<T>(&self) -> Option<&T>
where T: ObjectType,

Tries to cast to reference to an object of type T. This handles upcasting, downcasting and casting between interface and interface implementors. All checks are performed at runtime, while downcast and upcast will do many checks at compile-time already. Read more
source§

unsafe fn unsafe_cast<T>(self) -> T
where T: ObjectType,

Casts to T unconditionally. Read more
source§

unsafe fn unsafe_cast_ref<T>(&self) -> &T
where T: ObjectType,

Casts to &T unconditionally. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> IntoClosureReturnValue for T
where T: Into<Value>,

source§

impl<U> IsSubclassableExt for U

source§

impl<T> ObjectExt for T
where T: ObjectType,

source§

fn is<U>(&self) -> bool
where U: StaticType,

Returns true if the object is an instance of (can be cast to) T.
source§

fn type_(&self) -> Type

Returns the type of the object.
source§

fn object_class(&self) -> &Class<Object>

Returns the ObjectClass of the object. Read more
source§

fn class(&self) -> &Class<T>
where T: IsClass,

Returns the class of the object.
source§

fn class_of<U>(&self) -> Option<&Class<U>>
where U: IsClass,

Returns the class of the object in the given type T. Read more
source§

fn interface<U>(&self) -> Option<InterfaceRef<'_, U>>
where U: IsInterface,

Returns the interface T of the object. Read more
source§

fn set_property(&self, property_name: &str, value: impl Into<Value>)

Sets the property property_name of the object to value value. Read more
source§

fn set_property_from_value(&self, property_name: &str, value: &Value)

Sets the property property_name of the object to value value. Read more
source§

fn set_properties(&self, property_values: &[(&str, &dyn ToValue)])

Sets multiple properties of the object at once. Read more
source§

fn set_properties_from_value(&self, property_values: &[(&str, Value)])

Sets multiple properties of the object at once. Read more
source§

fn property<V>(&self, property_name: &str) -> V
where V: for<'b> FromValue<'b> + 'static,

Gets the property property_name of the object and cast it to the type V. Read more
source§

fn property_value(&self, property_name: &str) -> Value

Gets the property property_name of the object. Read more
source§

fn has_property(&self, property_name: &str, type_: Option<Type>) -> bool

Check if the object has a property property_name of the given type_. Read more
source§

fn property_type(&self, property_name: &str) -> Option<Type>

Get the type of the property property_name of this object. Read more
source§

fn find_property(&self, property_name: &str) -> Option<ParamSpec>

Get the ParamSpec of the property property_name of this object.
source§

fn list_properties(&self) -> PtrSlice<ParamSpec>

Return all ParamSpec of the properties of this object.
source§

fn freeze_notify(&self) -> PropertyNotificationFreezeGuard

Freeze all property notifications until the return guard object is dropped. Read more
source§

unsafe fn set_qdata<QD>(&self, key: Quark, value: QD)
where QD: 'static,

Set arbitrary data on this object with the given key. Read more
source§

unsafe fn qdata<QD>(&self, key: Quark) -> Option<NonNull<QD>>
where QD: 'static,

Return previously set arbitrary data of this object with the given key. Read more
source§

unsafe fn steal_qdata<QD>(&self, key: Quark) -> Option<QD>
where QD: 'static,

Retrieve previously set arbitrary data of this object with the given key. Read more
source§

unsafe fn set_data<QD>(&self, key: &str, value: QD)
where QD: 'static,

Set arbitrary data on this object with the given key. Read more
source§

unsafe fn data<QD>(&self, key: &str) -> Option<NonNull<QD>>
where QD: 'static,

Return previously set arbitrary data of this object with the given key. Read more
source§

unsafe fn steal_data<QD>(&self, key: &str) -> Option<QD>
where QD: 'static,

Retrieve previously set arbitrary data of this object with the given key. Read more
source§

fn block_signal(&self, handler_id: &SignalHandlerId)

Block a given signal handler. Read more
source§

fn unblock_signal(&self, handler_id: &SignalHandlerId)

Unblock a given signal handler.
source§

fn stop_signal_emission(&self, signal_id: SignalId, detail: Option<Quark>)

Stop emission of the currently emitted signal.
source§

fn stop_signal_emission_by_name(&self, signal_name: &str)

Stop emission of the currently emitted signal by the (possibly detailed) signal name.
source§

fn connect<F>( &self, signal_name: &str, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,

Connect to the signal signal_name on this object. Read more
source§

fn connect_id<F>( &self, signal_id: SignalId, details: Option<Quark>, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,

Connect to the signal signal_id on this object. Read more
source§

fn connect_local<F>( &self, signal_name: &str, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + 'static,

Connect to the signal signal_name on this object. Read more
source§

fn connect_local_id<F>( &self, signal_id: SignalId, details: Option<Quark>, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + 'static,

Connect to the signal signal_id on this object. Read more
source§

unsafe fn connect_unsafe<F>( &self, signal_name: &str, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value>,

Connect to the signal signal_name on this object. Read more
source§

unsafe fn connect_unsafe_id<F>( &self, signal_id: SignalId, details: Option<Quark>, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value>,

Connect to the signal signal_id on this object. Read more
source§

fn connect_closure( &self, signal_name: &str, after: bool, closure: RustClosure ) -> SignalHandlerId

Connect a closure to the signal signal_name on this object. Read more
source§

fn connect_closure_id( &self, signal_id: SignalId, details: Option<Quark>, after: bool, closure: RustClosure ) -> SignalHandlerId

Connect a closure to the signal signal_id on this object. Read more
source§

fn watch_closure(&self, closure: &impl AsRef<Closure>)

Limits the lifetime of closure to the lifetime of the object. When the object’s reference count drops to zero, the closure will be invalidated. An invalidated closure will ignore any calls to invoke_with_values, or invoke when using Rust closures.
source§

fn emit<R>(&self, signal_id: SignalId, args: &[&dyn ToValue]) -> R

Emit signal by signal id. Read more
source§

fn emit_with_values(&self, signal_id: SignalId, args: &[Value]) -> Option<Value>

Same as Self::emit but takes Value for the arguments.
source§

fn emit_by_name<R>(&self, signal_name: &str, args: &[&dyn ToValue]) -> R

Emit signal by its name. Read more
source§

fn emit_by_name_with_values( &self, signal_name: &str, args: &[Value] ) -> Option<Value>

Emit signal by its name. Read more
source§

fn emit_by_name_with_details<R>( &self, signal_name: &str, details: Quark, args: &[&dyn ToValue] ) -> R

Emit signal by its name with details. Read more
source§

fn emit_by_name_with_details_and_values( &self, signal_name: &str, details: Quark, args: &[Value] ) -> Option<Value>

Emit signal by its name with details. Read more
source§

fn emit_with_details<R>( &self, signal_id: SignalId, details: Quark, args: &[&dyn ToValue] ) -> R

Emit signal by signal id with details. Read more
source§

fn emit_with_details_and_values( &self, signal_id: SignalId, details: Quark, args: &[Value] ) -> Option<Value>

Emit signal by signal id with details. Read more
source§

fn disconnect(&self, handler_id: SignalHandlerId)

Disconnect a previously connected signal handler.
source§

fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
where F: Fn(&T, &ParamSpec) + Send + Sync + 'static,

Connect to the notify signal of the object. Read more
source§

fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
where F: Fn(&T, &ParamSpec) + 'static,

Connect to the notify signal of the object. Read more
source§

unsafe fn connect_notify_unsafe<F>( &self, name: Option<&str>, f: F ) -> SignalHandlerId
where F: Fn(&T, &ParamSpec),

Connect to the notify signal of the object. Read more
source§

fn notify(&self, property_name: &str)

Notify that the given property has changed its value. Read more
source§

fn notify_by_pspec(&self, pspec: &ParamSpec)

Notify that the given property has changed its value. Read more
source§

fn downgrade(&self) -> WeakRef<T>

Downgrade this object to a weak reference.
source§

fn add_weak_ref_notify<F>(&self, f: F) -> WeakRefNotify<T>
where F: FnOnce() + Send + 'static,

Add a callback to be notified when the Object is disposed.
source§

fn add_weak_ref_notify_local<F>(&self, f: F) -> WeakRefNotify<T>
where F: FnOnce() + 'static,

Add a callback to be notified when the Object is disposed. Read more
source§

fn bind_property<'f, 't, O, 'a>( &'a self, source_property: &'a str, target: &'a O, target_property: &'a str ) -> BindingBuilder<'a, 'f, 't>
where O: ObjectType,

Bind property source_property on this object to the target_property on the target object. Read more
source§

fn ref_count(&self) -> u32

Returns the strong reference count of this object.
source§

unsafe fn run_dispose(&self)

Runs the dispose mechanism of the object. Read more
source§

impl<T> Property for T
where T: HasParamSpec,

§

type Value = T

source§

impl<T> PropertyGet for T
where T: HasParamSpec,

§

type Value = T

source§

fn get<R, F>(&self, f: F) -> R
where F: Fn(&<T as PropertyGet>::Value) -> R,

source§

impl<T> StaticTypeExt for T
where T: StaticType,

source§

fn ensure_type()

Ensures that the type has been registered with the type system.
source§

impl<T> ToOwned for T
where T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
source§

impl<T> ToString for T
where T: Display + ?Sized,

source§

default fn to_string(&self) -> String

Converts the given value to a String. Read more
source§

impl<T> TransparentType for T

source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T> TryFromClosureReturnValue for T
where T: for<'a> FromValue<'a> + StaticType + 'static,

source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

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

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
source§

impl<'a, T, C, E> FromValueOptional<'a> for T
where T: FromValue<'a, Checker = C>, C: ValueTypeChecker<Error = ValueTypeMismatchOrNoneError<E>>, E: Error + Send + 'static,

source§

impl<Super, Sub> MayDowncastTo<Sub> for Super
where Super: IsA<Super>, Sub: IsA<Super>,