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Issue #12091: simplify ApplyResult and MapResult with threading.Event 

Patch by Charles-François Natali
This commit is contained in:
Richard Oudkerk 2012-05-25 13:26:53 +01:00
parent be39cfc9dc
commit 692130a231
1 changed files with 9 additions and 30 deletions
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39
Lib/multiprocessing/pool.py
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@ -526,32 +526,26 @@ class Pool(object):
class ApplyResult(object):
def __init__(self, cache, callback, error_callback):
self._cond = threading.Condition(threading.Lock())
self._event = threading.Event()
self._job = next(job_counter)
self._cache = cache
self._ready = False
self._callback = callback
self._error_callback = error_callback
cache[self._job] = self
def ready(self):
return self._ready
return self._event.is_set()
def successful(self):
assert self._ready
assert self.ready()
return self._success
def wait(self, timeout=None):
self._cond.acquire()
try:
if not self._ready:
self._cond.wait(timeout)
finally:
self._cond.release()
self._event.wait(timeout)
def get(self, timeout=None):
self.wait(timeout)
if not self._ready:
if not self.ready():
raise TimeoutError
if self._success:
return self._value
@ -564,12 +558,7 @@ class ApplyResult(object):
self._callback(self._value)
if self._error_callback and not self._success:
self._error_callback(self._value)
self._cond.acquire()
try:
self._ready = True
self._cond.notify()
finally:
self._cond.release()
self._event.set()
del self._cache[self._job]
#
@ -586,7 +575,7 @@ class MapResult(ApplyResult):
self._chunksize = chunksize
if chunksize <= 0:
self._number_left = 0
self._ready = True
self._event.set()
else:
self._number_left = length//chunksize + bool(length % chunksize)
@ -599,24 +588,14 @@ class MapResult(ApplyResult):
if self._callback:
self._callback(self._value)
del self._cache[self._job]
self._cond.acquire()
try:
self._ready = True
self._cond.notify()
finally:
self._cond.release()
self._event.set()
else:
self._success = False
self._value = result
if self._error_callback:
self._error_callback(self._value)
del self._cache[self._job]
self._cond.acquire()
try:
self._ready = True
self._cond.notify()
finally:
self._cond.release()
self._event.set()
#
# Class whose instances are returned by `Pool.imap()`