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Co-authored-by: mkdev11 <MkDev11@users.noreply.github.com> Co-authored-by: Tao Sun <168447269+fengju0213@users.noreply.github.com> Co-authored-by: a7m-1st <Ahmed.jimi.awelkeir500@gmail.com> Co-authored-by: Wendong-Fan <w3ndong.fan@gmail.com> Co-authored-by: Claude <noreply@anthropic.com>
69 lines
2.9 KiB
Python
69 lines
2.9 KiB
Python
# ========= Copyright 2025-2026 @ Eigent.ai All Rights Reserved. =========
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ========= Copyright 2025-2026 @ Eigent.ai All Rights Reserved. =========
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import asyncio
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import contextvars
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import logging
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from threading import Lock
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# Thread-safe reference to main event loop using contextvars
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# This ensures each request has its own event loop reference, avoiding race conditions
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_main_event_loop_var: contextvars.ContextVar[
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asyncio.AbstractEventLoop | None
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] = contextvars.ContextVar("_main_event_loop", default=None)
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# Global fallback for main event loop reference
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# Used when contextvars don't propagate to worker threads (e.g., asyncio.to_thread)
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_GLOBAL_MAIN_LOOP: asyncio.AbstractEventLoop | None = None
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_GLOBAL_MAIN_LOOP_LOCK = Lock()
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def set_main_event_loop(loop: asyncio.AbstractEventLoop | None):
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"""Set the main event loop reference for thread-safe task scheduling.
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This should be called from the main async context before spawning threads
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that need to schedule async tasks. Uses both contextvars (for request isolation)
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and a global fallback (for thread pool workers where contextvars may not propagate).
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"""
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global _GLOBAL_MAIN_LOOP
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_main_event_loop_var.set(loop)
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with _GLOBAL_MAIN_LOOP_LOCK:
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_GLOBAL_MAIN_LOOP = loop
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def _schedule_async_task(coro):
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"""Schedule an async coroutine as a task, thread-safe.
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This function handles scheduling from both the main event loop thread
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and from worker threads (e.g., when using asyncio.to_thread).
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"""
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try:
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# Try to get the running loop (works in main event loop thread)
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loop = asyncio.get_running_loop()
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loop.create_task(coro)
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except RuntimeError:
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# No running loop in this thread (we're in a worker thread)
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# First try contextvars, then fallback to global reference
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main_loop = _main_event_loop_var.get()
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if main_loop is None:
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with _GLOBAL_MAIN_LOOP_LOCK:
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main_loop = _GLOBAL_MAIN_LOOP
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if main_loop is not None and main_loop.is_running():
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asyncio.run_coroutine_threadsafe(coro, main_loop)
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else:
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# This should not happen in normal operation - log error and skip
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logging.error(
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"No event loop available for async task scheduling, task skipped. "
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"Ensure set_main_event_loop() is called before parallel agent creation."
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)
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