gstreamer-rs/gstreamer/src/promise.rs

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// Copyright (C) 2018 Sebastian Dröge <sebastian@centricular.com>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use ffi;
use glib::translate::*;
use glib_ffi;
use gobject_ffi;
use std::mem;
use std::ptr;
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use PromiseResult;
use Structure;
use StructureRef;
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glib_wrapper! {
pub struct Promise(Shared<ffi::GstPromise>);
match fn {
ref => |ptr| ffi::gst_mini_object_ref(ptr as *mut _) as *mut ffi::GstPromise,
unref => |ptr| ffi::gst_mini_object_unref(ptr as *mut _),
get_type => || ffi::gst_promise_get_type(),
}
}
impl Promise {
#[cfg(any(feature = "v1_14", feature = "dox"))]
pub fn new() -> Promise {
assert_initialized_main_thread!();
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unsafe { from_glib_full(ffi::gst_promise_new()) }
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}
#[cfg(any(feature = "v1_14", feature = "dox"))]
pub fn new_with_change_func<F>(func: F) -> Promise
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where
F: FnOnce(&Promise) + Send + 'static,
{
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let user_data: Box<Option<Box<F>>> = Box::new(Some(Box::new(func)));
unsafe extern "C" fn trampoline<F: FnOnce(&Promise) + Send + 'static>(
promise: *mut ffi::GstPromise,
user_data: glib_ffi::gpointer,
) {
let user_data: &mut Option<Box<F>> = &mut *(user_data as *mut _);
let callback = user_data.take().unwrap();
callback(&from_glib_borrow(promise));
}
unsafe extern "C" fn free_user_data<F: FnOnce(&Promise) + Send + 'static>(
user_data: glib_ffi::gpointer,
) {
let _: Box<Option<Box<F>>> = Box::from_raw(user_data as *mut _);
}
let trampoline = trampoline::<F>;
let free_user_data = free_user_data::<F>;
unsafe {
from_glib_full(ffi::gst_promise_new_with_change_func(
Some(trampoline),
Box::into_raw(user_data) as *mut _,
Some(free_user_data),
))
}
}
#[cfg(any(feature = "v1_14", feature = "dox"))]
pub fn expire(&self) {
unsafe {
ffi::gst_promise_expire(self.to_glib_none().0);
}
}
#[cfg(any(feature = "v1_14", feature = "dox"))]
pub fn get_reply(&self) -> Option<&StructureRef> {
unsafe {
let s = ffi::gst_promise_get_reply(self.to_glib_none().0);
if s.is_null() {
None
} else {
Some(StructureRef::from_glib_borrow(s))
}
}
}
#[cfg(any(feature = "v1_14", feature = "dox"))]
pub fn interrupt(&self) {
unsafe {
ffi::gst_promise_interrupt(self.to_glib_none().0);
}
}
#[cfg(any(feature = "v1_14", feature = "dox"))]
pub fn reply(&self, s: Structure) {
unsafe {
ffi::gst_promise_reply(self.to_glib_none().0, s.into_ptr());
}
}
#[cfg(any(feature = "v1_14", feature = "dox"))]
pub fn wait(&self) -> PromiseResult {
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unsafe { from_glib(ffi::gst_promise_wait(self.to_glib_none().0)) }
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}
}
#[cfg(any(feature = "v1_14", feature = "dox"))]
impl Default for Promise {
fn default() -> Self {
Self::new()
}
}
unsafe impl Send for Promise {}
unsafe impl Sync for Promise {}