mirror of
https://github.com/PaiGramTeam/MibooGram.git
synced 2024-11-21 14:48:29 +00:00
448 lines
14 KiB
Python
448 lines
14 KiB
Python
"""线程安全的队列"""
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import asyncio
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import sys
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from asyncio import QueueEmpty as AsyncQueueEmpty
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from asyncio import QueueFull as AsyncQueueFull
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from collections import deque
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from heapq import heappop, heappush
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from queue import Empty as SyncQueueEmpty
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from queue import Full as SyncQueueFull
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from threading import Condition, Lock
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from typing import TYPE_CHECKING, Any, Callable, Deque, Generic, List, NoReturn, Optional, Set, TypeVar
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from utils.typedefs import AsyncQueue, SyncQueue
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if TYPE_CHECKING:
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from asyncio import AbstractEventLoop as EventLoop
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__all__ = (
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"Queue",
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"PriorityQueue",
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"LifoQueue",
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)
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T = TypeVar("T")
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OptFloat = Optional[float]
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class Queue(Generic[T]):
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"""线程安全的同步、异步队列"""
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_loop: "EventLoop"
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@property
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def loop(self) -> "EventLoop":
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"""返回该队列的事件循环"""
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try:
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self._loop = asyncio.get_running_loop()
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except RuntimeError as e:
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raise RuntimeError("没有正在运行的事件循环, 请在异步函数中使用.") from e
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return self._loop
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def __init__(self, maxsize: int = 0):
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"""初始化队列
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Args:
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maxsize (int): 队列的大小
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Returns:
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无
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"""
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self._maxsize = maxsize
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self._init()
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self.unfinished_tasks = 0
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self.sync_mutex = Lock()
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self.sync_not_empty = Condition(self.sync_mutex)
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self.sync_not_full = Condition(self.sync_mutex)
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self.all_tasks_done = Condition(self.sync_mutex)
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self.async_mutex = asyncio.Lock()
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if sys.version_info[:3] == (3, 10, 0):
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# 针对 3.10 的 bug
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getattr(self.async_mutex, "_get_loop", lambda: None)()
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self.async_not_empty = asyncio.Condition(self.async_mutex)
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self.async_not_full = asyncio.Condition(self.async_mutex)
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self.finished = asyncio.Event()
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self.finished.set()
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self.closing = False
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self.pending = set() # type: Set[asyncio.Future[Any]]
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def checked_call_soon_threadsafe(callback: Callable[..., None], *args: Any):
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try:
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self.loop.call_soon_threadsafe(callback, *args)
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except RuntimeError:
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pass
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self._call_soon_threadsafe = checked_call_soon_threadsafe
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def checked_call_soon(callback: Callable[..., None], *args: Any):
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if not self.loop.is_closed():
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self.loop.call_soon(callback, *args)
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self._call_soon = checked_call_soon
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self._sync_queue = _SyncQueueProxy(self)
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self._async_queue = _AsyncQueueProxy(self)
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def close(self):
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"""关闭队列"""
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with self.sync_mutex:
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self.closing = True
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for fut in self.pending:
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fut.cancel()
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self.finished.set() # 取消堵塞全部的 async_q.join()
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self.all_tasks_done.notify_all() # 取消堵塞全部的 sync_q.join()
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async def wait_closed(self):
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if not self.closing:
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raise RuntimeError("队列已被关闭")
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await asyncio.sleep(0)
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if not self.pending:
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return
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await asyncio.wait(self.pending)
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@property
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def closed(self) -> bool:
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return self.closing and not self.pending
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@property
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def maxsize(self) -> int:
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return self._maxsize
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@property
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def sync_q(self) -> "_SyncQueueProxy[T]":
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return self._sync_queue
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@property
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def async_q(self) -> "_AsyncQueueProxy[T]":
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return self._async_queue
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def _init(self):
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self._queue = deque() # type: Deque[T]
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def qsize(self) -> int:
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return len(self._queue)
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def put(self, item: T):
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self._queue.append(item)
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def get(self) -> T:
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return self._queue.popleft()
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def put_internal(self, item: T):
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self.put(item)
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self.unfinished_tasks += 1
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self.finished.clear()
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def notify_sync_not_empty(self):
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def f():
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with self.sync_mutex:
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self.sync_not_empty.notify()
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self.loop.run_in_executor(None, f)
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def notify_sync_not_full(self):
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def f():
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with self.sync_mutex:
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self.sync_not_full.notify()
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fut = asyncio.ensure_future(self.loop.run_in_executor(None, f))
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fut.add_done_callback(self.pending.discard)
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self.pending.add(fut)
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def notify_async_not_empty(self, *, threadsafe: bool):
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async def f():
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async with self.async_mutex:
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self.async_not_empty.notify()
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def task_maker():
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task = self.loop.create_task(f())
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task.add_done_callback(self.pending.discard)
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self.pending.add(task)
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if threadsafe:
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self._call_soon_threadsafe(task_maker)
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else:
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self._call_soon(task_maker)
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def notify_async_not_full(self, *, threadsafe: bool):
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async def f():
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async with self.async_mutex:
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self.async_not_full.notify()
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def task_maker():
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task = self.loop.create_task(f())
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task.add_done_callback(self.pending.discard)
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self.pending.add(task)
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if threadsafe:
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self._call_soon_threadsafe(task_maker)
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else:
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self._call_soon(task_maker)
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def check_closing(self):
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if self.closing:
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raise RuntimeError("禁止对已关闭的队列进行操作")
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# noinspection PyProtectedMember
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class _SyncQueueProxy(SyncQueue[T]): # pylint: disable=W0212
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"""同步"""
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def __init__(self, parent: Queue[T]):
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self._parent = parent
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@property
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def maxsize(self) -> int:
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return self._parent.maxsize
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@property
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def closed(self) -> bool:
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return self._parent.closed
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def task_done(self):
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self._parent.check_closing()
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with self._parent.all_tasks_done:
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unfinished = self._parent.unfinished_tasks - 1
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if unfinished <= 0:
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if unfinished < 0:
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raise ValueError("task_done() 执行次数过多")
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self._parent.all_tasks_done.notify_all()
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self._parent.loop.call_soon_threadsafe(self._parent.finished.set)
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self._parent.unfinished_tasks = unfinished
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def join(self):
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self._parent.check_closing()
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with self._parent.all_tasks_done:
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while self._parent.unfinished_tasks:
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self._parent.all_tasks_done.wait()
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self._parent.check_closing()
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def qsize(self) -> int:
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"""返回队列的大致大小（不可靠）"""
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return self._parent.qsize()
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@property
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def unfinished_tasks(self) -> int:
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"""返回未完成 task 的数量"""
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return self._parent.unfinished_tasks
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def empty(self) -> bool:
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return not self._parent.qsize()
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def full(self) -> bool:
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return 0 < self._parent.maxsize <= self._parent.qsize()
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def put(self, item: T, block: bool = True, timeout: OptFloat = None):
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self._parent.check_closing()
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with self._parent.sync_not_full:
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if self._parent.maxsize > 0:
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if not block:
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if self._parent.qsize() >= self._parent.maxsize:
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raise SyncQueueFull
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elif timeout is None:
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while self._parent.qsize() >= self._parent.maxsize:
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self._parent.sync_not_full.wait()
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elif timeout < 0:
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raise ValueError("'timeout' 必须为一个非负数")
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else:
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time = self._parent.loop.time
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end_time = time() + timeout
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while self._parent.qsize() >= self._parent.maxsize:
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remaining = end_time - time()
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if remaining <= 0.0:
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raise SyncQueueFull
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self._parent.sync_not_full.wait(remaining)
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self._parent.put_internal(item)
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self._parent.sync_not_empty.notify()
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self._parent.notify_async_not_empty(threadsafe=True)
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def get(self, block: bool = True, timeout: OptFloat = None) -> T:
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self._parent.check_closing()
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with self._parent.sync_not_empty:
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if not block:
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if not self._parent.qsize():
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raise SyncQueueEmpty
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elif timeout is None:
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while not self._parent.qsize():
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self._parent.sync_not_empty.wait()
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elif timeout < 0:
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raise ValueError("'timeout' 必须为一个非负数")
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else:
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time = self._parent.loop.time
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end_time = time() + timeout
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while not self._parent.qsize():
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remaining = end_time - time()
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if remaining <= 0.0:
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raise SyncQueueEmpty
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self._parent.sync_not_empty.wait(remaining)
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item = self._parent.get()
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self._parent.sync_not_full.notify()
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self._parent.notify_async_not_full(threadsafe=True)
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return item
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def put_nowait(self, item: T):
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return self.put(item, block=False)
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def get_nowait(self) -> T:
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return self.get(block=False)
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# noinspection PyProtectedMember
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class _AsyncQueueProxy(AsyncQueue[T]): # pylint: disable=W0212
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"""异步"""
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def __init__(self, parent: Queue[T]):
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self._parent = parent
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@property
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def closed(self) -> bool:
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return self._parent.closed
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def qsize(self) -> int:
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return self._parent.qsize()
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@property
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def unfinished_tasks(self) -> int:
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return self._parent.unfinished_tasks
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@property
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def maxsize(self) -> int:
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return self._parent.maxsize
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def empty(self) -> bool:
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return self.qsize() == 0
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def full(self) -> bool:
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if self._parent.maxsize <= 0:
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return False
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return self.qsize() >= self._parent.maxsize
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async def put(self, item: T) -> None:
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self._parent.check_closing()
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async with self._parent.async_not_full:
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self._parent.sync_mutex.acquire()
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locked = True
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try:
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if self._parent.maxsize > 0:
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do_wait = True
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while do_wait:
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do_wait = self._parent.qsize() >= self._parent.maxsize
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if do_wait:
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locked = False
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self._parent.sync_mutex.release()
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await self._parent.async_not_full.wait()
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self._parent.sync_mutex.acquire()
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locked = True
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self._parent.put_internal(item)
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self._parent.async_not_empty.notify()
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self._parent.notify_sync_not_empty()
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finally:
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if locked:
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self._parent.sync_mutex.release()
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def put_nowait(self, item: T):
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self._parent.check_closing()
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with self._parent.sync_mutex and 0 < self._parent.maxsize <= self._parent.qsize():
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raise AsyncQueueFull
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self._parent.put_internal(item)
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self._parent.notify_async_not_empty(threadsafe=False)
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self._parent.notify_sync_not_empty()
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async def get(self) -> T:
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self._parent.check_closing()
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async with self._parent.async_not_empty:
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self._parent.sync_mutex.acquire()
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locked = True
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try:
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do_wait = True
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while do_wait:
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do_wait = self._parent.qsize() == 0
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if do_wait:
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locked = False
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self._parent.sync_mutex.release()
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await self._parent.async_not_empty.wait()
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self._parent.sync_mutex.acquire()
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locked = True
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item = self._parent.get()
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self._parent.async_not_full.notify()
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self._parent.notify_sync_not_full()
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return item
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finally:
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if locked:
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self._parent.sync_mutex.release()
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def get_nowait(self) -> T:
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self._parent.check_closing()
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with self._parent.sync_mutex:
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if self._parent.qsize() == 0:
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raise AsyncQueueEmpty
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item = self._parent.get()
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self._parent.notify_async_not_full(threadsafe=False)
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self._parent.notify_sync_not_full()
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return item
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def task_done(self):
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self._parent.check_closing()
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with self._parent.all_tasks_done:
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if self._parent.unfinished_tasks <= 0:
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raise ValueError("task_done() called too many times")
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self._parent.unfinished_tasks -= 1
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if self._parent.unfinished_tasks == 0:
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self._parent.finished.set()
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self._parent.all_tasks_done.notify_all()
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async def join(self) -> None:
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while True:
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with self._parent.sync_mutex:
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self._parent.check_closing()
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if self._parent.unfinished_tasks == 0:
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break
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await self._parent.finished.wait()
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class PriorityQueue(Queue[T]):
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"""优先级队列"""
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def _init(self):
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self._heap_queue: List[T] = []
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def qsize(self) -> int:
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return len(self._heap_queue)
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def put(self, item: T):
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if not isinstance(item, tuple):
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if hasattr(item, "priority"):
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item = (int(item.priority), item)
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else:
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try:
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item = (int(item), item)
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except (TypeError, ValueError):
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pass
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heappush(self._heap_queue, item)
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def get(self) -> T:
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return heappop(self._heap_queue)
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class LifoQueue(Queue[T]):
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"""后进先出队列"""
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def qsize(self) -> int:
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return len(self._queue)
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def put(self, item: T):
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self._queue.append(item)
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def get(self) -> T:
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return self._queue.pop()
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