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Add support for sniffio #278

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Add support for sniffio #278

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15 changes: 13 additions & 2 deletions curio/kernel.py
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Original file line number Diff line number Diff line change
Expand Up @@ -66,6 +66,11 @@
from .timequeue import TimeQueue
from .activation import Activation

try:
from sniffio import current_async_library_cvar
except ImportError:
current_async_library_cvar = None

# ----------------------------------------------------------------------
# Underlying kernel that drives everything
# ----------------------------------------------------------------------
Expand Down Expand Up @@ -823,5 +828,11 @@ def run(corofunc, *args, with_monitor=False, selector=None,
m = Monitor(kernel)
kernel._call_at_shutdown(m.close)

with kernel:
return kernel.run(corofunc, *args)
if current_async_library_cvar is not None:
token = current_async_library_cvar.set("curio")
try:
with kernel:
return kernel.run(corofunc, *args)
finally:
if current_async_library_cvar is not None:
current_async_library_cvar.reset(token)