Add support for aarch64 via docker

.github/workflows/release.yml

@@ -13,9 +13,13 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
-        target: [x86_64]
+        target: [x86_64, aarch64]
     steps:
       - uses: actions/checkout@v3
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
       - name: Log in to the Container registry
         uses: docker/login-action@v1
         with:
@@ -24,7 +28,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
       - uses: messense/maturin-action@v1
         with:
-          container: ghcr.io/kornia/kornia-rs/release:latest
+          container: ghcr.io/kornia/kornia-rs/release-${{ matrix.target }}:latest
           target: ${{ matrix.target }}
           manylinux: auto
           args: --release --out dist -i python${{ matrix.python-version }}

.github/workflows/release_docker.yml

@@ -10,10 +10,17 @@ env:
 jobs:
   build_docker:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - arch: amd64
+            label: x86_64
+          - arch: arm64
+            label: aarch64
     steps:
       -
         name: Checkout the repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       -
         name: Set up QEMU
         uses: docker/setup-qemu-action@v1
@@ -32,7 +39,7 @@ jobs:
         uses: docker/build-push-action@v2
         with:
           context: .
-          file: ./docker/release.Dockerfile
-          platforms: linux/amd64
+          file: ./docker/release-${{ matrix.arch }}.Dockerfile
+          platforms: linux/${{ matrix.arch }}
           push: true
-          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}/release:latest
+          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}/release-${{ matrix.label }}:latest

docker/release-arm64.Dockerfile

@@ -0,0 +1,12 @@
+FROM ghcr.io/rust-cross/manylinux2014-cross:aarch64
+
+# rust image comes with sh, we like bash more
+SHELL ["/bin/bash", "-c"]
+
+RUN uname -a
+
+RUN apt-get update --fix-missing && \
+    apt-get install -y --no-install-recommends \
+    gcc-aarch64-linux-gnu \
+    && \
+    apt-get clean

src/dlpack_py.rs

@@ -3,12 +3,13 @@ use dlpack_rs as dlpack;
 
 use pyo3::prelude::*;
 use std::ffi::{c_void, CStr, CString};
+use std::os::raw::c_char;
 
 const DLPACK_CAPSULE_NAME: &[u8] = b"dltensor\0";
 
 // desctructor function for the python capsule
 unsafe extern "C" fn dlpack_capsule_destructor(capsule: *mut pyo3::ffi::PyObject) {
-    if pyo3::ffi::PyCapsule_IsValid(capsule, DLPACK_CAPSULE_NAME.as_ptr() as *const i8) == 1 {
+    if pyo3::ffi::PyCapsule_IsValid(capsule, DLPACK_CAPSULE_NAME.as_ptr() as *const c_char) == 1 {
         // println!("Is an invalid capsule!");
         return;
     }
@@ -17,7 +18,7 @@ unsafe extern "C" fn dlpack_capsule_destructor(capsule: *mut pyo3::ffi::PyObject
 
     let expected_name = CString::new("dltensor").unwrap();
 
-    let current_name_ptr: *const i8 = pyo3::ffi::PyCapsule_GetName(capsule);
+    let current_name_ptr: *const c_char = pyo3::ffi::PyCapsule_GetName(capsule);
     let current_name = CStr::from_ptr(current_name_ptr);
     // println!("Expected Name: {:?}", expected_name);
     // println!("Current Name: {:?}", current_name);
@@ -94,7 +95,7 @@ pub fn cvtensor_to_dlpack(x: &cv::Tensor, py: Python) -> PyResult<PyObject> {
     let capsule: PyObject = unsafe {
         let ptr = pyo3::ffi::PyCapsule_New(
             &*dlm_tensor_bx as *const dlpack::DLManagedTensor as *mut c_void,
-            DLPACK_CAPSULE_NAME.as_ptr() as *const i8,
+            DLPACK_CAPSULE_NAME.as_ptr() as *const c_char,
             Some(dlpack_capsule_destructor as pyo3::ffi::PyCapsule_Destructor),
         );
         PyObject::from_owned_ptr(py, ptr)