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Detect Pyodide to avoid get_asyncgen_hooks #795

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Merged
almarklein merged 1 commit into from
Feb 18, 2026
Merged

Detect Pyodide to avoid get_asyncgen_hooks #795

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10 changes: 10 additions & 0 deletions wgpu/_async.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,9 +10,15 @@

logger = logging.getLogger("wgpu")

IS_PYODIDE = sys.platform == "emscripten"


def detect_current_async_lib():
"""Get the lib name of the currently active async lib, or None."""

if IS_PYODIDE:
return "asyncio"

ob = sys.get_asyncgen_hooks()[0]
if ob is not None:
try:
Expand All @@ -29,6 +35,10 @@ def detect_current_async_lib():
def detect_current_call_soon_threadsafe():
"""Get the current applicable call_soon_threadsafe function, or None"""

# Pyodide always runs asyncio (which wraps the JS native event loop)
if IS_PYODIDE:
return sys.modules["asyncio"].get_running_loop().call_soon_threadsafe

# Get asyncgen hook func, return fast when no async loop active
ob = sys.get_asyncgen_hooks()[0]
if ob is None:
Expand Down