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+import asyncio
+import functools
+from typing import Awaitable, Callable, Optional
+
+import anyio
+import anyio.to_thread
+from typing_extensions import ParamSpec, TypeVar
+
+T_ParamSpec = ParamSpec("T_ParamSpec")
+T_Retval = TypeVar("T_Retval")
+
+
+def function_has_argument(function: Callable, arg_name: str) -> bool:
+ """Helper function to check if a function has a specific argument."""
+ import inspect
+
+ signature = inspect.signature(function)
+ return arg_name in signature.parameters
+
+
+def asyncify(
+ function: Callable[T_ParamSpec, T_Retval],
+ *,
+ cancellable: bool = False,
+ limiter: Optional[anyio.CapacityLimiter] = None,
+) -> Callable[T_ParamSpec, Awaitable[T_Retval]]:
+ """
+ Take a blocking function and create an async one that receives the same
+ positional and keyword arguments, and that when called, calls the original function
+ in a worker thread using `anyio.to_thread.run_sync()`.
+
+ If the `cancellable` option is enabled and the task waiting for its completion is
+ cancelled, the thread will still run its course but its return value (or any raised
+ exception) will be ignored.
+
+ ## Arguments
+ - `function`: a blocking regular callable (e.g. a function)
+ - `cancellable`: `True` to allow cancellation of the operation
+ - `limiter`: capacity limiter to use to limit the total amount of threads running
+ (if omitted, the default limiter is used)
+
+ ## Return
+ An async function that takes the same positional and keyword arguments as the
+ original one, that when called runs the same original function in a thread worker
+ and returns the result.
+ """
+
+ async def wrapper(
+ *args: T_ParamSpec.args, **kwargs: T_ParamSpec.kwargs
+ ) -> T_Retval:
+ partial_f = functools.partial(function, *args, **kwargs)
+
+ # In `v4.1.0` anyio added the `abandon_on_cancel` argument and deprecated the old
+ # `cancellable` argument, so we need to use the new `abandon_on_cancel` to avoid
+ # surfacing deprecation warnings.
+ if function_has_argument(anyio.to_thread.run_sync, "abandon_on_cancel"):
+ return await anyio.to_thread.run_sync(
+ partial_f,
+ abandon_on_cancel=cancellable,
+ limiter=limiter,
+ )
+
+ return await anyio.to_thread.run_sync(
+ partial_f,
+ cancellable=cancellable,
+ limiter=limiter,
+ )
+
+ return wrapper
+
+
+def run_async_function(async_function, *args, **kwargs):
+ """
+ Helper utility to run an async function in a sync context.
+ Handles the case where there is an existing event loop running.
+
+ Args:
+ async_function (Callable): The async function to run
+ *args: Positional arguments to pass to the async function
+ **kwargs: Keyword arguments to pass to the async function
+
+ Returns:
+ The result of the async function execution
+
+ Example:
+ ```python
+ async def my_async_func(x, y):
+ return x + y
+
+ result = run_async_function(my_async_func, 1, 2)
+ ```
+ """
+ from concurrent.futures import ThreadPoolExecutor
+
+ def run_in_new_loop():
+ """Run the coroutine in a new event loop within this thread."""
+ new_loop = asyncio.new_event_loop()
+ try:
+ asyncio.set_event_loop(new_loop)
+ return new_loop.run_until_complete(async_function(*args, **kwargs))
+ finally:
+ new_loop.close()
+ asyncio.set_event_loop(None)
+
+ try:
+ # First, try to get the current event loop
+ _ = asyncio.get_running_loop()
+ # If we're already in an event loop, run in a separate thread
+ # to avoid nested event loop issues
+ with ThreadPoolExecutor(max_workers=1) as executor:
+ future = executor.submit(run_in_new_loop)
+ return future.result()
+
+ except RuntimeError:
+ # No running event loop, we can safely run in this thread
+ return run_in_new_loop()