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# This file is part of Pebble.
# Copyright (c) 2013-2025, Matteo Cafasso
# Pebble is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation,
# either version 3 of the License, or (at your option) any later version.
# Pebble is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public License
# along with Pebble. If not, see <http://www.gnu.org/licenses/>.
import asyncio
import multiprocessing
from typing import Callable
from threading import Thread
from traceback import format_exc
from pebble.common.types import Result, ResultStatus
def launch_thread(name, function, daemon, *args, **kwargs):
thread = Thread(target=function, name=name, args=args, kwargs=kwargs)
thread.daemon = daemon
thread.start()
return thread
def execute(function, *args, **kwargs):
"""Runs the given function returning its results or exception."""
try:
return Result(ResultStatus.SUCCESS, function(*args, **kwargs))
except BaseException as error:
try:
error.traceback = format_exc()
except AttributeError: # Frozen exception
pass
return Result(ResultStatus.FAILURE, error)
def get_asyncio_loop() -> asyncio.BaseEventLoop:
"""Backwards compatible loop getter."""
try:
return asyncio.get_running_loop()
except AttributeError:
return asyncio.get_event_loop()
################################################################################
# @concurrent/@asyncrhonous decorators. #
################################################################################
def decorate_function(wrapper: Callable, *args, **kwargs) -> Callable:
"""Decorate the function taking care of all the possible uses."""
name = kwargs.get('name')
pool = kwargs.get('pool')
daemon = kwargs.get('daemon', True)
timeout = kwargs.get('timeout')
mp_context = kwargs.get('context')
# decorator without parameters: @process/process(function)
if not kwargs and len(args) == 1 and callable(args[0]):
return wrapper(args[0], name, daemon, timeout, multiprocessing, pool)
# decorator with parameters
_validate_parameters(name, daemon, timeout)
mp_context = mp_context if mp_context is not None else multiprocessing
## without @pie syntax: process(function, timeout=12)
if len(args) == 1 and callable(args[0]):
return wrapper(args[0], name, daemon, timeout, multiprocessing, pool)
## with @pie syntax: @process(timeout=12)
def decorating_function(function: Callable) -> Callable:
return wrapper(function, name, daemon, timeout, mp_context, pool)
return decorating_function
def _validate_parameters(name: str, daemon: bool, timeout: float):
if name is not None and not isinstance(name, str):
raise TypeError('Name expected to be None or string')
if daemon is not None and not isinstance(daemon, bool):
raise TypeError('Daemon expected to be None or bool')
if timeout is not None and not isinstance(timeout, (int, float)):
raise TypeError('Timeout expected to be None or integer or float')
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