candle-metal-kernels 0.9.2

Metal kernels for Candle
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use objc2::{rc::Retained, runtime::ProtocolObject};
use objc2_foundation::NSRange;
use objc2_metal::{MTLBuffer, MTLResource};
use std::{collections::HashMap, sync::Arc};

pub type MetalResource = ProtocolObject<dyn MTLResource>;
pub type MTLResourceOptions = objc2_metal::MTLResourceOptions;

#[derive(Clone, Debug, Hash, PartialEq)]
pub struct Buffer {
    raw: Retained<ProtocolObject<dyn MTLBuffer>>,
}

unsafe impl Send for Buffer {}
unsafe impl Sync for Buffer {}

impl Buffer {
    pub fn new(raw: Retained<ProtocolObject<dyn MTLBuffer>>) -> Buffer {
        Buffer { raw }
    }

    pub fn contents(&self) -> *mut u8 {
        self.data()
    }

    pub fn data(&self) -> *mut u8 {
        use objc2_metal::MTLBuffer as _;
        self.as_ref().contents().as_ptr() as *mut u8
    }

    pub fn length(&self) -> usize {
        self.as_ref().length()
    }

    pub fn did_modify_range(&self, range: NSRange) {
        self.as_ref().didModifyRange(range);
    }
}

impl AsRef<ProtocolObject<dyn MTLBuffer>> for Buffer {
    fn as_ref(&self) -> &ProtocolObject<dyn MTLBuffer> {
        &self.raw
    }
}

impl<'a> From<&'a Buffer> for &'a MetalResource {
    fn from(val: &'a Buffer) -> Self {
        ProtocolObject::from_ref(val.as_ref())
    }
}

pub type BufferMap = HashMap<usize, Vec<Arc<Buffer>>>;