mirror of https://github.com/nocturn9x/giambio.git
108 lines
3.2 KiB
Python
108 lines
3.2 KiB
Python
"""
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Helper methods and public API
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Copyright (C) 2020 nocturn9x
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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"""
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import socket
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import threading
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from .core import AsyncScheduler
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from .exceptions import GiambioError
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from .context import TaskManager
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from .socket import AsyncSocket
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from .util.debug import BaseDebugger
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from types import FunctionType, CoroutineType, GeneratorType
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thread_local = threading.local()
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def get_event_loop():
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"""
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Returns the event loop associated to the current
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thread
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"""
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try:
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return thread_local.loop
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except AttributeError:
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raise GiambioError("no event loop set") from None
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def new_event_loop(debugger: BaseDebugger):
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"""
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Associates a new event loop to the current thread
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and deactivates the old one. This should not be
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called explicitly unless you know what you're doing
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"""
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try:
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loop = thread_local.loop
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except AttributeError:
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thread_local.loop = AsyncScheduler(debugger)
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else:
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if not loop.done():
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raise GiambioError("cannot set event loop while running")
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else:
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thread_local.loop = AsyncScheduler(debugger)
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def run(func: FunctionType, *args, **kwargs):
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"""
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Starts the event loop from a synchronous entry point
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"""
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if isinstance(func, (CoroutineType, GeneratorType)):
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raise GiambioError("Looks like you tried to call giambio.run(your_func(arg1, arg2, ...)), that is wrong!"
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"\nWhat you wanna do, instead, is this: giambio.run(your_func, arg1, arg2, ...)")
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elif not isinstance(func, FunctionType):
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raise GiambioError("gaibmio.run() requires an async function as parameter!")
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new_event_loop(kwargs.get("debugger", None))
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thread_local.loop.start(func, *args)
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def clock():
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"""
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Returns the current clock time of the thread-local event
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loop
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"""
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try:
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return thread_local.loop.clock()
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except AttributeError:
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raise GiambioError("Cannot call clock from outside an async context") from None
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def wrap_socket(sock: socket.socket) -> AsyncSocket:
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"""
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Wraps a synchronous socket into a giambio.socket.AsyncSocket
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"""
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try:
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return thread_local.loop.wrap_socket(sock)
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except AttributeError:
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raise GiambioError("Cannot wrap a socket from outside an async context") from None
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def create_pool():
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"""
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Creates an async pool
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"""
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try:
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return TaskManager(thread_local.loop)
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except AttributeError:
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raise GiambioError("It appears that giambio is not running, did you call giambio.create_pool()"
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" outside of an async context?") from None
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