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# MIT License
# Copyright (c) 2024 The HuggingFace Team
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
import os
from math_verify.errors import TimeoutException
def timeout(timeout_seconds: int = 10): # noqa: C901
"""A decorator that applies a timeout to the decorated function.
Args:
timeout_seconds (int): Number of seconds before timing out the decorated function.
Defaults to 10 seconds.
Notes:
On Unix systems, uses a signal-based alarm approach which is more efficient as it doesn't require spawning a new process.
On Windows systems, uses a multiprocessing-based approach since signal.alarm is not available. This will incur a huge performance penalty.
"""
if os.name == "posix":
# Unix-like approach: signal.alarm
import signal
def decorator(func):
def handler(signum, frame):
raise TimeoutException("Operation timed out!")
def wrapper(*args, **kwargs):
old_handler = signal.getsignal(signal.SIGALRM)
signal.signal(signal.SIGALRM, handler)
signal.alarm(timeout_seconds)
try:
return func(*args, **kwargs)
finally:
# Cancel the alarm and restore previous handler
signal.alarm(0)
signal.signal(signal.SIGALRM, old_handler)
return wrapper
return decorator
else:
# Windows approach: use multiprocessing
from multiprocessing import Process, Queue
def decorator(func):
def wrapper(*args, **kwargs):
q = Queue()
def run_func(q, args, kwargs):
try:
result = func(*args, **kwargs)
q.put((True, result))
except Exception as e:
q.put((False, e))
p = Process(target=run_func, args=(q, args, kwargs))
p.start()
p.join(timeout_seconds)
if p.is_alive():
# Timeout: Terminate the process
p.terminate()
p.join()
raise TimeoutException("Operation timed out!")
# If we got here, the process completed in time.
success, value = q.get()
if success:
return value
else:
# The child raised an exception; re-raise it here
raise value
return wrapper
return decorator