Enum rerun::external::eframe::egui_wgpu::wgpu::hal::vulkan::Fence

pub enum Fence {
    TimelineSemaphore(Semaphore),
    FencePool {
        last_completed: u64,
        active: Vec<(u64, Fence)>,
        free: Vec<Fence>,
    },
}
Expand description

The Api::Fence type for vulkan::Api.

This is an enum because there are two possible implementations of wgpu-hal fences on Vulkan: Vulkan fences, which work on any version of Vulkan, and Vulkan timeline semaphores, which are easier and cheaper but require non-1.0 features.

Device::create_fence returns a TimelineSemaphore if VK_KHR_timeline_semaphore is available and enabled, and a FencePool otherwise.

Variants§

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TimelineSemaphore(Semaphore)

A Vulkan timeline semaphore.

These are simpler to use than Vulkan fences, since timeline semaphores work exactly the way wpgu_hal::Api::Fence is specified to work.

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FencePool

A collection of Vulkan fences, each associated with a FenceValue.

The effective FenceValue of this variant is the greater of last_completed and the maximum value associated with a signalled fence in active.

Fences are available in all versions of Vulkan, but since they only have two states, “signaled” and “unsignaled”, we need to use a separate fence for each queue submission we might want to wait for, and remember which FenceValue each one represents.

Fields

§last_completed: u64
§active: Vec<(u64, Fence)>

The pending fence values have to be ascending.

§free: Vec<Fence>

Trait Implementations§

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impl Debug for Fence

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl DynResource for Fence

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fn as_any(&self) -> &(dyn Any + 'static)

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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

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impl DynFence for Fence

Auto Trait Implementations§

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impl Freeze for Fence

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impl RefUnwindSafe for Fence

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impl Send for Fence

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impl Sync for Fence

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impl Unpin for Fence

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impl UnwindSafe for Fence

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