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log

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maybe_uninit

memchr

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fallback.rs iter.rs lib.rs naive.rs

memmap

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lib.rs shared.rs

mio

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naga

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proc

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arena.rs lib.rs

net2

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bytes

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character

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macros.rs mod.rs

multi

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number

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sequence

macros.rs mod.rs

error.rs internal.rs lib.rs methods.rs str.rs traits.rs util.rs whitespace.rs

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num_cpus

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object

once_cell

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ordered_float

ordermap

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osmesa_sys

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parking_lot

condvar.rs deadlock.rs elision.rs lib.rs mutex.rs once.rs raw_mutex.rs raw_rwlock.rs remutex.rs rwlock.rs util.rs

parking_lot_core

thread_parker

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lib.rs parking_lot.rs spinwait.rs util.rs word_lock.rs

percent_encoding

petgraph

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attribute.rs derive.rs mod.rs

lib.rs pinned_drop.rs project.rs utils.rs

pin_project_lite

pin_utils

lib.rs projection.rs stack_pin.rs

ppv_lite86

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lib.rs soft.rs types.rs

proc_macro2

detection.rs fallback.rs lib.rs marker.rs parse.rs wrapper.rs

proc_macro_hack

error.rs iter.rs lib.rs parse.rs quote.rs

proc_macro_nested

quote

ext.rs format.rs ident_fragment.rs lib.rs runtime.rs spanned.rs to_tokens.rs

rand

rand_chacha

chacha.rs guts.rs lib.rs

rand_core

block.rs error.rs impls.rs le.rs lib.rs os.rs

raw_window_handle

read_color

relevant

rendy

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chain

schedule

family.rs mod.rs queue.rs submission.rs

collect.rs lib.rs node.rs resource.rs sync.rs

rendy_command

buffer

encoder.rs level.rs mod.rs reset.rs state.rs submit.rs usage.rs

family

mod.rs queue.rs submission.rs

capability.rs fence.rs lib.rs pool.rs

rendy_core

types

mod.rs vertex.rs

backend.rs casts.rs features.rs lib.rs slow.rs wrap.rs

rendy_descriptor

allocator.rs lib.rs ranges.rs

rendy_factory

barriers.rs blitter.rs config.rs factory.rs lib.rs upload.rs

rendy_frame

cirque

command.rs mod.rs

frame.rs lib.rs

rendy_graph

graph

node

render

group

mod.rs simple.rs

mod.rs present.rs

rendy_init

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allocator

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heaps

heap.rs memory_type.rs mod.rs

mapping

mod.rs range.rs write.rs

block.rs lib.rs memory.rs usage.rs util.rs utilization.rs

rendy_mesh

format.rs lib.rs mesh.rs

rendy_resource

sampler

cache.rs mod.rs

buffer.rs escape.rs image.rs lib.rs resources.rs set.rs

rendy_shader

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rustc_demangle

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rustc_hash

rusttype

ryu

buffer

pretty

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common.rs d2s.rs d2s_full_table.rs d2s_intrinsics.rs digit_table.rs f2s.rs f2s_intrinsics.rs lib.rs

same_file

scoped_tls

scopeguard

serde

de

from_primitive.rs ignored_any.rs impls.rs mod.rs utf8.rs value.rs

private

de.rs macros.rs mod.rs ser.rs

ser

fmt.rs impls.rs impossible.rs mod.rs

export.rs integer128.rs lib.rs macros.rs

serde_derive

internals

ast.rs attr.rs case.rs check.rs ctxt.rs mod.rs symbol.rs

bound.rs de.rs dummy.rs fragment.rs lib.rs pretend.rs ser.rs try.rs

serde_json

features_check

io

value

de.rs from.rs index.rs mod.rs partial_eq.rs ser.rs

de.rs error.rs iter.rs lib.rs macros.rs map.rs number.rs read.rs ser.rs

shaderc

shaderc_sys

shared_library

dynamic_library.rs lib.rs

slab

smallvec

smithay_client_toolkit

data_device

data_device.rs data_offer.rs data_source.rs mod.rs

keyboard

ffi.rs keysyms.rs mod.rs

pointer

mod.rs theme.rs

shell

mod.rs wl.rs xdg.rs zxdg.rs

utils

mempool.rs mod.rs

window

basic_frame.rs concept_frame.rs mod.rs

env.rs lib.rs output.rs surface.rs

smithay_clipboard

lib.rs threaded.rs

spirv_headers

autogen_spirv.rs lib.rs

stb_truetype

syn

takeable_option

texture

thiserror

aserror.rs display.rs lib.rs

thiserror_impl

ast.rs attr.rs expand.rs fmt.rs lib.rs prop.rs valid.rs

thread_profiler

time

display.rs duration.rs lib.rs parse.rs sys.rs

tracing

dispatcher.rs field.rs instrument.rs level_filters.rs lib.rs macros.rs span.rs stdlib.rs subscriber.rs

tracing_core

callsite.rs dispatcher.rs event.rs field.rs lib.rs metadata.rs parent.rs span.rs stdlib.rs subscriber.rs

ttf_parser

typed_arena

unicode_xid

lib.rs tables.rs

vecmath

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viewport

vk_sys

void

vulkano

buffer

cpu_access.rs cpu_pool.rs device_local.rs immutable.rs mod.rs slice.rs sys.rs traits.rs usage.rs view.rs

command_buffer

descriptor

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collection.rs fixed_size_pool.rs mod.rs persistent.rs std_pool.rs sys.rs unsafe_layout.rs

pipeline_layout

empty.rs limits_check.rs mod.rs runtime_desc.rs sys.rs traits.rs tweaks.rs union.rs

descriptor.rs mod.rs

device

extensions.rs mod.rs

framebuffer

attachments_list.rs compat_atch.rs desc.rs empty.rs framebuffer.rs macros.rs mod.rs sys.rs traits.rs

image

attachment.rs immutable.rs layout.rs mod.rs storage.rs swapchain.rs sys.rs traits.rs usage.rs

instance

debug.rs extensions.rs instance.rs layers.rs limits.rs loader.rs mod.rs

memory

pool

host_visible.rs mod.rs non_host_visible.rs pool.rs

device_memory.rs mod.rs

pipeline

query

swapchain

capabilities.rs display.rs mod.rs present_region.rs surface.rs swapchain.rs

sync

future

fence_signal.rs join.rs mod.rs now.rs semaphore_signal.rs

event.rs fence.rs mod.rs pipeline.rs semaphore.rs

extensions.rs features.rs format.rs lib.rs sampler.rs version.rs

vulkano_shaders

codegen.rs descriptor_sets.rs entry_point.rs enums.rs lib.rs parse.rs spec_consts.rs spirv_search.rs structs.rs

walkdir

dent.rs error.rs lib.rs util.rs

wayland_client

native_lib

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cursor.rs display.rs event_queue.rs globals.rs lib.rs proxy.rs sinks.rs

wayland_commons

debug.rs filter.rs lib.rs map.rs socket.rs user_data.rs wire.rs

wayland_cursor

wayland_egl

wayland_protocols

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wayland_sys

client.rs common.rs egl.rs lib.rs server.rs

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direct.rs mod.rs native_gpu_future.rs

util

lib.rs macros.rs

wgpu_core

wgpu_types

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platform

desktop.rs mod.rs unix.rs

platform_impl

linux

wayland

event_loop

mod.rs proxy.rs sink.rs state.rs

seat

keyboard

handlers.rs keymap.rs mod.rs

pointer

data.rs handlers.rs mod.rs

text_input

handlers.rs mod.rs

touch

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window

env.rs mod.rs output.rs

x11

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x11

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x11_clipboard

error.rs lib.rs run.rs

x11_dl

dpms.rs error.rs glx.rs internal.rs keysym.rs lib.rs link.rs xcursor.rs xf86vmode.rs xfixes.rs xft.rs xinerama.rs xinput.rs xinput2.rs xlib.rs xlib_xcb.rs xmd.rs xmu.rs xrandr.rs xrecord.rs xrender.rs xss.rs xt.rs xtest.rs

xcb

ffi

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lib.rs parser.rs

xdg

xml

use super::arc_wake::{ArcWake};
use super::waker::waker_vtable;
use alloc::sync::Arc;
use core::mem::ManuallyDrop;
use core::marker::PhantomData;
use core::ops::Deref;
use core::task::{Waker, RawWaker};

/// A [`Waker`] that is only valid for a given lifetime.
///
/// Note: this type implements [`Deref<Target = Waker>`](std::ops::Deref),
/// so it can be used to get a `&Waker`.
#[derive(Debug)]
pub struct WakerRef<'a> {
    waker: ManuallyDrop<Waker>,
    _marker: PhantomData<&'a ()>,
}

impl<'a> WakerRef<'a> {
    /// Create a new [`WakerRef`] from a [`Waker`] reference.
    pub fn new(waker: &'a Waker) -> Self {
        // copy the underlying (raw) waker without calling a clone,
        // as we won't call Waker::drop either.
        let waker = ManuallyDrop::new(unsafe { core::ptr::read(waker) });
        WakerRef {
            waker,
            _marker: PhantomData,
        }
    }

    /// Create a new [`WakerRef`] from a [`Waker`] that must not be dropped.
    ///
    /// Note: this if for rare cases where the caller created a [`Waker`] in
    /// an unsafe way (that will be valid only for a lifetime to be determined
    /// by the caller), and the [`Waker`] doesn't need to or must not be
    /// destroyed.
    pub fn new_unowned(waker: ManuallyDrop<Waker>) -> Self {
        WakerRef {
            waker,
            _marker: PhantomData,
        }
    }
}

impl Deref for WakerRef<'_> {
    type Target = Waker;

    fn deref(&self) -> &Waker {
        &self.waker
    }
}

/// Creates a reference to a [`Waker`] from a reference to `Arc<impl ArcWake>`.
///
/// The resulting [`Waker`] will call
/// [`ArcWake.wake()`](ArcWake::wake) if awoken.
#[inline]
pub fn waker_ref<W>(wake: &Arc<W>) -> WakerRef<'_>
where
    W: ArcWake
{
    // simply copy the pointer instead of using Arc::into_raw,
    // as we don't actually keep a refcount by using ManuallyDrop.<
    let ptr = (&**wake as *const W) as *const ();

    let waker = ManuallyDrop::new(unsafe {
        Waker::from_raw(RawWaker::new(ptr, waker_vtable::<W>()))
    });
    WakerRef::new_unowned(waker)
}