skip uvloop tests on free-threaded build

Author: davidhewitt

.github/workflows/ci.yml

@@ -125,8 +125,8 @@ jobs:
       - name: Build
         run: cargo build --features=${{env.features}} --verbose --target ${{ matrix.platform.rust-target }}
 
-      # uvloop doesn't compile under Windows and PyPy
-      - if: ${{ matrix.platform.os != 'windows-latest' && !startsWith(matrix.python-version, 'pypy') }}
+      # uvloop doesn't compile under Windows and PyPy, nor for free-threaded Python
+      - if: ${{ matrix.platform.os != 'windows-latest' && !startsWith(matrix.python-version, 'pypy') && !endsWith(matrix.python-version, 't') }}
         name: Install pyo3-asyncio test dependencies
         run: |
           python -m pip install -U uvloop

pytests/test_async_std_uvloop.rs

@@ -4,6 +4,14 @@ fn main() -> pyo3::PyResult<()> {
     pyo3::prepare_freethreaded_python();
 
     Python::with_gil(|py| {
+        // uvloop not supported on the free-threaded build yet
+        // https://github.com/MagicStack/uvloop/issues/642
+        let sysconfig = py.import("sysconfig")?;
+        let is_freethreaded = sysconfig.call_method1("get_config_var", ("Py_GIL_DISABLED",))?;
+        if is_freethreaded.is_truthy()? {
+            return Ok(());
+        }
+
         let uvloop = py.import("uvloop")?;
         uvloop.call_method0("install")?;
 

pytests/test_tokio_current_thread_uvloop.rs

@@ -13,6 +13,14 @@ fn main() -> pyo3::PyResult<()> {
     });
 
     Python::with_gil(|py| {
+        // uvloop not supported on the free-threaded build yet
+        // https://github.com/MagicStack/uvloop/issues/642
+        let sysconfig = py.import("sysconfig")?;
+        let is_freethreaded = sysconfig.call_method1("get_config_var", ("Py_GIL_DISABLED",))?;
+        if is_freethreaded.is_truthy()? {
+            return Ok(());
+        }
+
         let uvloop = py.import("uvloop")?;
         uvloop.call_method0("install")?;
 

pytests/test_tokio_multi_thread_uvloop.rs

@@ -5,6 +5,14 @@ fn main() -> pyo3::PyResult<()> {
     pyo3::prepare_freethreaded_python();
 
     Python::with_gil(|py| {
+        // uvloop not supported on the free-threaded build yet
+        // https://github.com/MagicStack/uvloop/issues/642
+        let sysconfig = py.import("sysconfig")?;
+        let is_freethreaded = sysconfig.call_method1("get_config_var", ("Py_GIL_DISABLED",))?;
+        if is_freethreaded.is_truthy()? {
+            return Ok(());
+        }
+
         let uvloop = py.import("uvloop")?;
         uvloop.call_method0("install")?;