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49 lines
1.3 KiB
Rust
49 lines
1.3 KiB
Rust
// Copyright (C) 2016-2017 Sebastian Dröge <sebastian@centricular.com>
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use std::ptr;
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use glib_ffi;
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use gobject_ffi;
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#[macro_export]
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macro_rules! callback_guard {
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() => {
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let _guard = $crate::glib::CallbackGuard::new();
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};
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}
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#[macro_export]
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macro_rules! floating_reference_guard {
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($obj:ident) => {
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let _guard = $crate::guard::FloatingReferenceGuard::new($obj as *mut _);
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};
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}
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pub struct FloatingReferenceGuard(ptr::NonNull<gobject_ffi::GObject>);
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impl FloatingReferenceGuard {
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pub unsafe fn new(obj: *mut gobject_ffi::GObject) -> Option<FloatingReferenceGuard> {
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assert!(!obj.is_null());
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if gobject_ffi::g_object_is_floating(obj) != glib_ffi::GFALSE {
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gobject_ffi::g_object_ref_sink(obj);
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Some(FloatingReferenceGuard(ptr::NonNull::new_unchecked(obj)))
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} else {
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None
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}
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}
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}
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impl Drop for FloatingReferenceGuard {
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fn drop(&mut self) {
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unsafe {
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gobject_ffi::g_object_force_floating(self.0.as_ptr());
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}
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}
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}
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