xgpui-apple 5.0.0

Apple rendering and platform services for xgpui
Documentation 
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#![cfg(any(target_os = "macos", target_os = "ios"))]
//! Shared Apple rendering, task dispatch, and system services for GPUI.
//!
//! This crate renders GPUI scenes directly with Metal on Apple platforms. It
//! owns GPU resources, text rendering, Keychain access, and thermal notifications
//! while leaving application lifecycle, windowing, and input to each platform backend.

pub mod custom_draw;
mod dispatcher;
pub mod display_link;
pub mod keychain;
pub mod metal;
mod metal_atlas;
pub mod metal_renderer;
pub mod process_info;

#[cfg(feature = "font-kit")]
mod open_type;
#[cfg(feature = "font-kit")]
mod text_system;

use objc2::MainThreadMarker;

pub use dispatcher::{AppleActivity, AppleDispatcher};
#[cfg(feature = "font-kit")]
pub use text_system::AppleTextSystem;

#[inline]
pub fn main_thread_marker() -> Option<MainThreadMarker> {
    thread_local! {
        static MAIN_THREAD_MARKER: Option<MainThreadMarker> = MainThreadMarker::new();
    }
    MAIN_THREAD_MARKER.with(|marker| *marker)
}

#[cfg(test)]
mod tests {
    use super::main_thread_marker;

    #[test]
    fn main_thread_marker_rejects_background_threads() {
        std::thread::spawn(|| {
            assert_eq!(main_thread_marker(), None);
            assert_eq!(main_thread_marker(), None);
        })
        .join()
        .expect("background thread panicked");
    }
}