/
dispatcher.rs
106 lines (92 loc) · 2.76 KB
/
dispatcher.rs
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#![allow(non_upper_case_globals)]
#![allow(non_camel_case_types)]
#![allow(non_snake_case)]
use crate::{PlatformDispatcher, TaskLabel};
use async_task::Runnable;
use objc::{
class, msg_send,
runtime::{BOOL, YES},
sel, sel_impl,
};
use parking::{Parker, Unparker};
use parking_lot::Mutex;
use std::{
ffi::c_void,
ptr::{addr_of, NonNull},
sync::Arc,
time::Duration,
};
/// All items in the generated file are marked as pub, so we're gonna wrap it in a separate mod to prevent
/// these pub items from leaking into public API.
pub(crate) mod dispatch_sys {
include!(concat!(env!("OUT_DIR"), "/dispatch_sys.rs"));
}
use dispatch_sys::*;
pub(crate) fn dispatch_get_main_queue() -> dispatch_queue_t {
unsafe { addr_of!(_dispatch_main_q) as *const _ as dispatch_queue_t }
}
pub(crate) struct MacDispatcher {
parker: Arc<Mutex<Parker>>,
}
impl Default for MacDispatcher {
fn default() -> Self {
Self::new()
}
}
impl MacDispatcher {
pub fn new() -> Self {
MacDispatcher {
parker: Arc::new(Mutex::new(Parker::new())),
}
}
}
impl PlatformDispatcher for MacDispatcher {
fn is_main_thread(&self) -> bool {
let is_main_thread: BOOL = unsafe { msg_send![class!(NSThread), isMainThread] };
is_main_thread == YES
}
fn dispatch(&self, runnable: Runnable, _: Option<TaskLabel>) {
unsafe {
dispatch_async_f(
dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH.try_into().unwrap(), 0),
runnable.into_raw().as_ptr() as *mut c_void,
Some(trampoline),
);
}
}
fn dispatch_on_main_thread(&self, runnable: Runnable) {
unsafe {
dispatch_async_f(
dispatch_get_main_queue(),
runnable.into_raw().as_ptr() as *mut c_void,
Some(trampoline),
);
}
}
fn dispatch_after(&self, duration: Duration, runnable: Runnable) {
unsafe {
let queue =
dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT.try_into().unwrap(), 0);
let when = dispatch_time(DISPATCH_TIME_NOW as u64, duration.as_nanos() as i64);
dispatch_after_f(
when,
queue,
runnable.into_raw().as_ptr() as *mut c_void,
Some(trampoline),
);
}
}
fn tick(&self, _background_only: bool) -> bool {
false
}
fn park(&self) {
self.parker.lock().park()
}
fn unparker(&self) -> Unparker {
self.parker.lock().unparker()
}
}
extern "C" fn trampoline(runnable: *mut c_void) {
let task = unsafe { Runnable::<()>::from_raw(NonNull::new_unchecked(runnable as *mut ())) };
task.run();
}