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use ffi;
use translate::*;
use std::mem;
use std::mem::transmute;
use ffi as glib_ffi;
use ffi::{gpointer, gboolean};
use std::cell::RefCell;
use MainContext;
use Source;
use SourceId;
use source::{CallbackGuard, Priority};
impl MainContext {
pub fn prepare(&self) -> (bool, i32) {
unsafe {
let mut priority = mem::uninitialized();
let res = from_glib(ffi::g_main_context_prepare(self.to_glib_none().0, &mut priority));
(res, priority)
}
}
pub fn find_source_by_id(&self, source_id: SourceId) -> Option<Source> {
unsafe {
from_glib_none(ffi::g_main_context_find_source_by_id(self.to_glib_none().0, source_id.to_glib()))
}
}
pub fn invoke<F>(&self, func: F)
where F: FnMut() + Send + 'static {
unsafe {
glib_ffi::g_main_context_invoke_full(self.to_glib_none().0, glib_ffi::G_PRIORITY_DEFAULT_IDLE, Some(trampoline),
into_raw(func), Some(destroy_closure))
}
}
pub fn invoke_with_priority<F>(&self, priority: Priority, func: F)
where F: FnMut() + Send + 'static {
unsafe {
glib_ffi::g_main_context_invoke_full(self.to_glib_none().0, priority.to_glib(), Some(trampoline),
into_raw(func), Some(destroy_closure))
}
}
}
unsafe extern "C" fn trampoline(func: gpointer) -> gboolean {
let _guard = CallbackGuard::new();
let func: &RefCell<Box<FnMut() + 'static>> = transmute(func);
(&mut *func.borrow_mut())();
glib_ffi::G_SOURCE_REMOVE
}
unsafe extern "C" fn destroy_closure(ptr: gpointer) {
let _guard = CallbackGuard::new();
Box::<RefCell<Box<FnMut() + 'static>>>::from_raw(ptr as *mut _);
}
fn into_raw<F: FnMut() + Send + 'static>(func: F) -> gpointer {
let func: Box<RefCell<Box<FnMut() + Send + 'static>>> =
Box::new(RefCell::new(Box::new(func)));
Box::into_raw(func) as gpointer
}