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use fragile::Fragile;
use gio_sys;
use glib;
use glib::object::{Cast, IsA};
use glib::translate::*;
use glib_sys;
use std::cell::RefCell;
use std::mem::transmute;
use std::ptr;
use Cancellable;
use Error;
use PollableInputStream;
#[cfg(feature = "futures")]
use futures::future::Future;
#[cfg(feature = "futures")]
use futures::stream::Stream;
pub trait PollableInputStreamExtManual: Sized {
fn create_source<F>(
&self,
cancellable: Option<&Cancellable>,
name: Option<&str>,
priority: glib::Priority,
func: F,
) -> glib::Source
where
F: FnMut(&Self) -> glib::Continue + 'static;
#[cfg(feature = "futures")]
fn create_source_future(
&self,
cancellable: Option<&Cancellable>,
priority: glib::Priority,
) -> Box<dyn Future<Output = ()> + std::marker::Unpin>;
#[cfg(feature = "futures")]
fn create_source_stream(
&self,
cancellable: Option<&Cancellable>,
priority: glib::Priority,
) -> Box<dyn Stream<Item = ()> + std::marker::Unpin>;
fn read_nonblocking(
&self,
buffer: &mut [u8],
cancellable: Option<&Cancellable>,
) -> Result<isize, Error>;
}
impl<O: IsA<PollableInputStream>> PollableInputStreamExtManual for O {
fn create_source<F>(
&self,
cancellable: Option<&Cancellable>,
name: Option<&str>,
priority: glib::Priority,
func: F,
) -> glib::Source
where
F: FnMut(&Self) -> glib::Continue + 'static,
{
#[cfg_attr(feature = "cargo-clippy", allow(transmute_ptr_to_ref))]
unsafe extern "C" fn trampoline<O: IsA<PollableInputStream>>(
stream: *mut gio_sys::GPollableInputStream,
func: glib_sys::gpointer,
) -> glib_sys::gboolean {
let func: &Fragile<RefCell<Box<dyn FnMut(&O) -> glib::Continue + 'static>>> =
transmute(func);
let func = func.get();
let mut func = func.borrow_mut();
(&mut *func)(&PollableInputStream::from_glib_borrow(stream).unsafe_cast()).to_glib()
}
unsafe extern "C" fn destroy_closure<O>(ptr: glib_sys::gpointer) {
Box::<Fragile<RefCell<Box<dyn FnMut(&O) -> glib::Continue + 'static>>>>::from_raw(
ptr as *mut _,
);
}
let cancellable = cancellable.to_glib_none();
unsafe {
let source = gio_sys::g_pollable_input_stream_create_source(
self.as_ref().to_glib_none().0,
cancellable.0,
);
let trampoline = trampoline::<Self> as glib_sys::gpointer;
glib_sys::g_source_set_callback(
source,
Some(transmute(trampoline)),
into_raw(func),
Some(destroy_closure::<Self>),
);
glib_sys::g_source_set_priority(source, priority.to_glib());
if let Some(name) = name {
glib_sys::g_source_set_name(source, name.to_glib_none().0);
}
from_glib_full(source)
}
}
fn read_nonblocking(
&self,
buffer: &mut [u8],
cancellable: Option<&Cancellable>,
) -> Result<isize, Error> {
let cancellable = cancellable.to_glib_none();
let count = buffer.len() as usize;
unsafe {
let mut error = ptr::null_mut();
let ret = gio_sys::g_pollable_input_stream_read_nonblocking(
self.as_ref().to_glib_none().0,
buffer.to_glib_none().0,
count,
cancellable.0,
&mut error,
);
if error.is_null() {
Ok(ret)
} else {
Err(from_glib_full(error))
}
}
}
#[cfg(feature = "futures")]
fn create_source_future(
&self,
cancellable: Option<&Cancellable>,
priority: glib::Priority,
) -> Box<dyn Future<Output = ()> + std::marker::Unpin> {
let cancellable: Option<Cancellable> = cancellable.cloned();
let obj = Fragile::new(self.clone());
Box::new(glib::SourceFuture::new(move |send| {
let mut send = Some(send);
obj.get()
.create_source(cancellable.as_ref(), None, priority, move |_| {
let _ = send.take().unwrap().send(());
glib::Continue(false)
})
}))
}
#[cfg(feature = "futures")]
fn create_source_stream(
&self,
cancellable: Option<&Cancellable>,
priority: glib::Priority,
) -> Box<dyn Stream<Item = ()> + std::marker::Unpin> {
let cancellable: Option<Cancellable> = cancellable.cloned();
let obj = Fragile::new(self.clone());
Box::new(glib::SourceStream::new(move |send| {
obj.get()
.create_source(cancellable.as_ref(), None, priority, move |_| {
if send.unbounded_send(()).is_err() {
glib::Continue(false)
} else {
glib::Continue(true)
}
})
}))
}
}
fn into_raw<O, F: FnMut(&O) -> glib::Continue + 'static>(func: F) -> glib_sys::gpointer {
let func: Box<Fragile<RefCell<Box<dyn FnMut(&O) -> glib::Continue + 'static>>>> =
Box::new(Fragile::new(RefCell::new(Box::new(func))));
Box::into_raw(func) as glib_sys::gpointer
}
