mtl-rs 0.2.2

Rust bindings for Apple's Metal API
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use objc2::{Encode, Encoding, RefEncode};

/// Describes what CPU cache mode is used for the CPU's mapping of a resource (from `MTLCPUCacheMode`).
///
/// Availability: macOS 10.11+, iOS 8.0+
#[repr(usize)]
#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, PartialOrd, Ord)]
pub enum MTLCPUCacheMode {
    /// The default cache mode for the system.
    DefaultCache = 0,
    /// Write-combined memory is optimized for resources that the CPU will write into, but never read.
    /// On some implementations, writes may bypass caches avoiding cache pollution, and reads perform very poorly.
    WriteCombined = 1,
}

unsafe impl Encode for MTLCPUCacheMode {
    const ENCODING: Encoding = usize::ENCODING;
}

unsafe impl RefEncode for MTLCPUCacheMode {
    const ENCODING_REF: Encoding = Encoding::Pointer(&Self::ENCODING);
}