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# Copyright (c) 2016-2023 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Based on the software developed by:
# Copyright (c) 2008,2016 david decotigny (Pool of threads)
# Copyright (c) 2006-2008, R Oudkerk (multiprocessing.Pool)
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. Neither the name of author nor the names of any contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
import time
import threading
from .api import *
from .pool import *
def test(arg=None):
if arg == "-v":
def say(*x):
print(*x)
else:
def say(*x):
pass
say("Start Pool testing")
print("oneTBB version is %s" % runtime_version())
print("oneTBB interface version is %s" % runtime_interface_version())
get_tid = lambda: threading.current_thread().ident
assert default_num_threads() == this_task_arena_max_concurrency()
def return42():
return 42
def f(x):
return x * x
def work(mseconds):
res = str(mseconds)
if mseconds < 0:
mseconds = -mseconds
say("[%d] Start to work for %fms..." % (get_tid(), mseconds*10))
time.sleep(mseconds/100.)
say("[%d] Work done (%fms)." % (get_tid(), mseconds*10))
return res
# special flag to to be set by thread calling async work
spin_flag = None
def timeout_work(param):
say("[%d] Spin wait work start..." % get_tid())
while spin_flag:
time.sleep(0.0001) # yield equivalent
say("[%d] Work done." % get_tid())
return str(param) if param != None else None
def prepare_timeout_exception():
nonlocal spin_flag
spin_flag = True # lock threads in timeout_work
def check_timeout_exception(pool_object, func):
nonlocal spin_flag
try:
func(pool_object)
except TimeoutError:
say("Good. Got expected timeout exception.")
else:
assert False, "Expected exception !"
spin_flag = False # unlock threads in timeout_work
### Test copy/pasted from multiprocessing
pool = Pool(4) # start worker threads
# edge cases
assert pool.map(return42, []) == []
assert pool.apply_async(return42, []).get() == 42
assert pool.apply(return42, []) == 42
assert list(pool.imap(return42, iter([]))) == []
assert list(pool.imap_unordered(return42, iter([]))) == []
assert pool.map_async(return42, []).get() == []
assert list(pool.imap_async(return42, iter([])).get()) == []
assert list(pool.imap_unordered_async(return42, iter([])).get()) == []
# basic tests
result = pool.apply_async(f, (10,)) # evaluate "f(10)" asynchronously
assert result.get(timeout=1) == 100 # ... unless slow computer
assert list(pool.map(f, range(10))) == list(map(f, range(10)))
it = pool.imap(f, range(10))
assert next(it) == 0
assert next(it) == 1
assert next(it) == 4
# Test apply_sync exceptions
prepare_timeout_exception()
result = pool.apply_async(timeout_work, (None,))
check_timeout_exception(result, lambda result : say(result.get(timeout=1)))
assert result.get() is None # sleep() returns None
def cb(s):
say("Result ready: %s" % s)
# Test imap()
assert list(pool.imap(work, range(10, 3, -1), chunksize=4)) == list(map(
str, range(10, 3, -1)))
# Test imap_unordered()
assert sorted(pool.imap_unordered(work, range(10, 3, -1))) == sorted(map(
str, range(10, 3, -1)))
# Test map_async()
prepare_timeout_exception()
result = pool.map_async(timeout_work, range(10), callback=cb)
check_timeout_exception(result, lambda result : result.get(timeout=0.01))
say(result.get())
# Test imap_async()
prepare_timeout_exception()
result = pool.imap_async(timeout_work, range(3, 10), callback=cb)
check_timeout_exception(result, lambda result : result.get(timeout=0.01))
for i in result.get():
say("Item:", i)
say("### Loop again:")
for i in result.get():
say("Item2:", i)
# Test imap_unordered_async()
prepare_timeout_exception()
result = pool.imap_unordered_async(timeout_work, range(10, 3, -1), callback=cb)
check_timeout_exception(result, lambda result : result.get(timeout=0.01))
for i in result.get():
say("Item1:", i)
for i in result.get():
say("Item2:", i)
r = result.get()
for i in r:
say("Item3:", i)
for i in r:
say("Item4:", i)
for i in r:
say("Item5:", i)
#
# The case for the exceptions
#
# Exceptions in imap_unordered_async()
result = pool.imap_unordered_async(work, range(2, -10, -1), callback=cb)
time.sleep(3)
try:
for i in result.get():
say("Got item:", i)
except (IOError, ValueError):
say("Good. Got expected exception")
# Exceptions in imap_async()
result = pool.imap_async(work, range(2, -10, -1), callback=cb)
time.sleep(3)
try:
for i in result.get():
say("Got item:", i)
except (IOError, ValueError):
say("Good. Got expected exception")
# Stop the test: need to stop the pool !!!
pool.terminate()
pool.join()
if __name__ == "__main__":
test()
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