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Make sure that backend testing in multiprocessing is done with a timeout #3741

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Merged
merged 4 commits into from
Nov 1, 2014
Merged

Make sure that backend testing in multiprocessing is done with a timeout #3741

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1a182a9
Use map_async and get to avoid a deadlock
jenshnielsen Oct 29, 2014
fd9940f
Wrap gtk3cairo test in try except
jenshnielsen Oct 29, 2014
ebee64b
Forcefully terminate
jenshnielsen Oct 29, 2014
cbddb99
Catch the right error
jenshnielsen Oct 30, 2014
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52 changes: 41 additions & 11 deletions setupext.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,6 @@
import warnings
from textwrap import fill


PY3 = (sys.version_info[0] >= 3)


Expand Down Expand Up @@ -1788,16 +1787,26 @@ def check_requirements(self):
except:
return "unknown (can not use multiprocessing to determine)"
try:
success, msg = p.map(backend_gtk3agg_internal_check, [0])[0]
res = p.map_async(backend_gtk3agg_internal_check, [0])
success, msg = res.get(timeout=10)[0]
except multiprocessing.TimeoutError:
p.terminate()
# No result returned. Probaly hanging, terminate the process.
success = False
raise CheckFailed("Check timed out")
except:
p.close()
# Some other error.
success = False
msg = "Could not determine"
finally:
raise
else:
p.close()
finally:
p.join()

if success:
BackendAgg.force = True

return msg
else:
raise CheckFailed(msg)
Expand Down Expand Up @@ -1852,12 +1861,25 @@ def check_requirements(self):
p = multiprocessing.Pool()
except:
return "unknown (can not use multiprocessing to determine)"
success, msg = p.map(backend_gtk3cairo_internal_check, [0])[0]
p.close()
p.join()
try:
res = p.map_async(backend_gtk3cairo_internal_check, [0])
success, msg = res.get(timeout=10)[0]
except multiprocessing.TimeoutError:
p.terminate()
# No result returned. Probaly hanging, terminate the process.
success = False
raise CheckFailed("Check timed out")
except:
p.close()
success = False
raise
else:
p.close()
finally:
p.join()

if success:
BackendAgg.force = True

return msg
else:
raise CheckFailed(msg)
Expand Down Expand Up @@ -1988,13 +2010,21 @@ def check_requirements(self):
else:
# Multiprocessing OK
try:
msg = p.map(self.callback, [self])[0]
res = p.map_async(self.callback, [self])
msg = res.get(timeout=10)[0]
except multiprocessing.TimeoutError:
p.terminate()
# No result returned. Probaly hanging, terminate the process.
raise CheckFailed("Check timed out")
except:
# If we hit an error on multiprocessing raise it
# Some other error.
p.close()
raise
else:
# Clean exit
p.close()
finally:
# Tidy up multiprocessing
p.close()
p.join()

return msg
Expand Down