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219 changes: 219 additions & 0 deletions
219
crates/libs/windows/src/extensions/Foundation/AsyncReady.rs
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use super::Async::Async; | ||
use crate::{core::*, Foundation::*}; | ||
use std::sync::atomic::{AtomicBool, Ordering}; | ||
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struct ReadyState<T: Async> { | ||
set_completed: AtomicBool, | ||
result: Result<T::Output>, | ||
} | ||
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impl<T: Async> ReadyState<T> { | ||
fn new(result: Result<T::Output>) -> Self { | ||
Self { set_completed: AtomicBool::new(false), result } | ||
} | ||
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fn status(&self) -> AsyncStatus { | ||
if self.result.is_ok() { | ||
AsyncStatus::Completed | ||
} else { | ||
AsyncStatus::Error | ||
} | ||
} | ||
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// The "Ready" implementations don't need to store the handler since the handler is invoked immediately | ||
// but still need to confirm that `SetCompleted` is called at most once. | ||
fn invoke_completed(&self, sender: &T, handler: Option<&T::CompletedHandler>) -> Result<()> { | ||
if self.set_completed.swap(true, Ordering::SeqCst) == false { | ||
if let Some(handler) = handler { | ||
sender.invoke_completed(handler, self.status()); | ||
} | ||
Ok(()) | ||
} else { | ||
Err(Error::from_hresult(HRESULT(0x80000018u32 as i32))) // E_ILLEGAL_DELEGATE_ASSIGNMENT | ||
} | ||
} | ||
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// The `From` implementation is not used here since we don't want to transfer any error object to the calling thread. | ||
// That happens when `GetResults` is called. | ||
fn error_code(&self) -> Result<HRESULT> { | ||
Ok(match &self.result { | ||
Ok(_) => HRESULT(0), | ||
Err(error) => error.code(), | ||
}) | ||
} | ||
} | ||
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#[implement(IAsyncAction, IAsyncInfo)] | ||
struct ReadyAction(ReadyState<IAsyncAction>); | ||
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#[implement(IAsyncOperation<T>, IAsyncInfo)] | ||
struct ReadyOperation<T>(ReadyState<IAsyncOperation<T>>) | ||
where | ||
T: RuntimeType + 'static; | ||
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#[implement(IAsyncActionWithProgress<P>, IAsyncInfo)] | ||
struct ReadyActionWithProgress<P>(ReadyState<IAsyncActionWithProgress<P>>) | ||
where | ||
P: RuntimeType + 'static; | ||
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#[implement(IAsyncOperationWithProgress<T, P>, IAsyncInfo)] | ||
struct ReadyOperationWithProgress<T, P>(ReadyState<IAsyncOperationWithProgress<T, P>>) | ||
where | ||
T: RuntimeType + 'static, | ||
P: RuntimeType + 'static; | ||
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impl IAsyncInfo_Impl for ReadyAction_Impl { | ||
fn Id(&self) -> Result<u32> { | ||
Ok(1) | ||
} | ||
fn Status(&self) -> Result<AsyncStatus> { | ||
Ok(self.0.status()) | ||
} | ||
fn ErrorCode(&self) -> Result<HRESULT> { | ||
self.0.error_code() | ||
} | ||
fn Cancel(&self) -> Result<()> { | ||
Ok(()) | ||
} | ||
fn Close(&self) -> Result<()> { | ||
Ok(()) | ||
} | ||
} | ||
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impl<T: RuntimeType> IAsyncInfo_Impl for ReadyOperation_Impl<T> { | ||
fn Id(&self) -> Result<u32> { | ||
Ok(1) | ||
} | ||
fn Status(&self) -> Result<AsyncStatus> { | ||
Ok(self.0.status()) | ||
} | ||
fn ErrorCode(&self) -> Result<HRESULT> { | ||
self.0.error_code() | ||
} | ||
fn Cancel(&self) -> Result<()> { | ||
Ok(()) | ||
} | ||
fn Close(&self) -> Result<()> { | ||
Ok(()) | ||
} | ||
} | ||
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impl<P: RuntimeType> IAsyncInfo_Impl for ReadyActionWithProgress_Impl<P> { | ||
fn Id(&self) -> Result<u32> { | ||
Ok(1) | ||
} | ||
fn Status(&self) -> Result<AsyncStatus> { | ||
Ok(self.0.status()) | ||
} | ||
fn ErrorCode(&self) -> Result<HRESULT> { | ||
self.0.error_code() | ||
} | ||
fn Cancel(&self) -> Result<()> { | ||
Ok(()) | ||
} | ||
fn Close(&self) -> Result<()> { | ||
Ok(()) | ||
} | ||
} | ||
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impl<T: RuntimeType, P: RuntimeType> IAsyncInfo_Impl for ReadyOperationWithProgress_Impl<T, P> { | ||
fn Id(&self) -> Result<u32> { | ||
Ok(1) | ||
} | ||
fn Status(&self) -> Result<AsyncStatus> { | ||
Ok(self.0.status()) | ||
} | ||
fn ErrorCode(&self) -> Result<HRESULT> { | ||
self.0.error_code() | ||
} | ||
fn Cancel(&self) -> Result<()> { | ||
Ok(()) | ||
} | ||
fn Close(&self) -> Result<()> { | ||
Ok(()) | ||
} | ||
} | ||
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impl IAsyncAction_Impl for ReadyAction_Impl { | ||
fn SetCompleted(&self, handler: Option<&AsyncActionCompletedHandler>) -> Result<()> { | ||
self.0.invoke_completed(&self.as_interface(), handler) | ||
} | ||
fn Completed(&self) -> Result<AsyncActionCompletedHandler> { | ||
Err(Error::empty()) | ||
} | ||
fn GetResults(&self) -> Result<()> { | ||
self.0.result.clone() | ||
} | ||
} | ||
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impl<T: RuntimeType> IAsyncOperation_Impl<T> for ReadyOperation_Impl<T> { | ||
fn SetCompleted(&self, handler: Option<&AsyncOperationCompletedHandler<T>>) -> Result<()> { | ||
self.0.invoke_completed(&self.as_interface(), handler) | ||
} | ||
fn Completed(&self) -> Result<AsyncOperationCompletedHandler<T>> { | ||
Err(Error::empty()) | ||
} | ||
fn GetResults(&self) -> Result<T> { | ||
self.0.result.clone() | ||
} | ||
} | ||
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impl<P: RuntimeType> IAsyncActionWithProgress_Impl<P> for ReadyActionWithProgress_Impl<P> { | ||
fn SetCompleted(&self, handler: Option<&AsyncActionWithProgressCompletedHandler<P>>) -> Result<()> { | ||
self.0.invoke_completed(&self.as_interface(), handler) | ||
} | ||
fn Completed(&self) -> Result<AsyncActionWithProgressCompletedHandler<P>> { | ||
Err(Error::empty()) | ||
} | ||
fn GetResults(&self) -> Result<()> { | ||
self.0.result.clone() | ||
} | ||
fn SetProgress(&self, _: Option<&AsyncActionProgressHandler<P>>) -> Result<()> { | ||
Ok(()) | ||
} | ||
fn Progress(&self) -> Result<AsyncActionProgressHandler<P>> { | ||
Err(Error::empty()) | ||
} | ||
} | ||
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impl<T: RuntimeType, P: RuntimeType> IAsyncOperationWithProgress_Impl<T, P> for ReadyOperationWithProgress_Impl<T, P> { | ||
fn SetCompleted(&self, handler: Option<&AsyncOperationWithProgressCompletedHandler<T, P>>) -> Result<()> { | ||
self.0.invoke_completed(&self.as_interface(), handler) | ||
} | ||
fn Completed(&self) -> Result<AsyncOperationWithProgressCompletedHandler<T, P>> { | ||
Err(Error::empty()) | ||
} | ||
fn GetResults(&self) -> Result<T> { | ||
self.0.result.clone() | ||
} | ||
fn SetProgress(&self, _: Option<&AsyncOperationProgressHandler<T, P>>) -> Result<()> { | ||
Ok(()) | ||
} | ||
fn Progress(&self) -> Result<AsyncOperationProgressHandler<T, P>> { | ||
Err(Error::empty()) | ||
} | ||
} | ||
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impl IAsyncAction { | ||
pub fn ready(result: Result<()>) -> Self { | ||
ReadyAction(ReadyState::new(result)).into() | ||
} | ||
} | ||
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impl<T: RuntimeType> IAsyncOperation<T> { | ||
pub fn ready(result: Result<T>) -> Self { | ||
ReadyOperation(ReadyState::new(result)).into() | ||
} | ||
} | ||
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impl<P: RuntimeType> IAsyncActionWithProgress<P> { | ||
pub fn ready(result: Result<()>) -> Self { | ||
ReadyActionWithProgress(ReadyState::new(result)).into() | ||
} | ||
} | ||
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impl<T: RuntimeType, P: RuntimeType> IAsyncOperationWithProgress<T, P> { | ||
pub fn ready(result: Result<T>) -> Self { | ||
ReadyOperationWithProgress(ReadyState::new(result)).into() | ||
} | ||
} |
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[package] | ||
name = "test_futures_impl" | ||
version = "0.0.0" | ||
edition = "2021" | ||
publish = false | ||
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[lib] | ||
doc = false | ||
doctest = false | ||
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[dependencies.windows] | ||
path = "../../libs/windows" | ||
features = [ | ||
"implement", | ||
"Foundation", | ||
"Win32_Foundation", | ||
] |
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