| Server IP : 74.208.127.88 / Your IP : 216.73.216.9 Web Server : Apache/2.4.41 (Ubuntu) System : Linux ubuntu 5.4.0-163-generic #180-Ubuntu SMP Tue Sep 5 13:21:23 UTC 2023 x86_64 User : www-data ( 33) PHP Version : 7.4.3-4ubuntu2.29 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /proc/self/root/snap/core20/current/usr/share/subiquity/subiquitycore/ |
Upload File : |
# Copyright 2019 Canonical, Ltd.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import asyncio
import concurrent.futures
import logging
log = logging.getLogger("subiquitycore.async_helpers")
def _done(fut):
try:
fut.result()
except asyncio.CancelledError:
pass
def schedule_task(coro, propagate_errors=True):
loop = asyncio.get_event_loop()
if asyncio.iscoroutine(coro):
task = asyncio.Task(coro)
else:
task = coro
if propagate_errors:
task.add_done_callback(_done)
loop.call_soon(asyncio.ensure_future, task)
return task
async def run_in_thread(func, *args):
loop = asyncio.get_event_loop()
try:
return await loop.run_in_executor(None, func, *args)
except concurrent.futures.CancelledError:
raise asyncio.CancelledError
class SingleInstanceTask:
def __init__(self, func, propagate_errors=True):
self.func = func
self.propagate_errors = propagate_errors
self.task = None
async def _start(self, old):
if old is not None:
old.cancel()
try:
await old
except BaseException:
pass
schedule_task(self.task, self.propagate_errors)
async def start(self, *args, **kw):
await self.start_sync(*args, **kw)
return self.task
def start_sync(self, *args, **kw):
old = self.task
coro = self.func(*args, **kw)
if asyncio.iscoroutine(coro):
self.task = asyncio.Task(coro)
else:
self.task = coro
return schedule_task(self._start(old))
async def wait(self):
while True:
try:
return await self.task
except asyncio.CancelledError:
pass