gstreamer-rs/gstreamer/src/utils.rs
Sebastian Dröge b21f576430 Add #[must_use] attribute to mutex guards / stream lock
It's usually a mistake if creating one of these and immediately dropping
them again as that would immediately unlock the mutex again.
2020-02-28 16:29:48 +02:00

31 lines
935 B
Rust

// Copyright (C) 2017 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 glib::translate::mut_override;
use glib_sys;
#[must_use = "if unused the Mutex will immediately unlock"]
pub struct MutexGuard<'a>(&'a glib_sys::GMutex);
impl<'a> MutexGuard<'a> {
#[allow(clippy::trivially_copy_pass_by_ref)]
pub fn lock(mutex: &'a glib_sys::GMutex) -> Self {
unsafe {
glib_sys::g_mutex_lock(mut_override(mutex));
}
MutexGuard(mutex)
}
}
impl<'a> Drop for MutexGuard<'a> {
fn drop(&mut self) {
unsafe {
glib_sys::g_mutex_unlock(mut_override(self.0));
}
}
}