forked from goodboy/tractor
69 lines
1.6 KiB
Python
69 lines
1.6 KiB
Python
"""
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Per process state
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"""
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from typing import Optional, Dict, Any
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from collections.abc import Mapping
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import multiprocessing as mp
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import trio
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from ._exceptions import NoRuntime
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_current_actor: Optional['Actor'] = None # type: ignore # noqa
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_runtime_vars: Dict[str, Any] = {
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'_debug_mode': False,
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'_is_root': False,
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'_root_mailbox': (None, None)
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}
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def current_actor(err_on_no_runtime: bool = True) -> 'Actor': # type: ignore # noqa
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"""Get the process-local actor instance.
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"""
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if _current_actor is None and err_on_no_runtime:
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raise NoRuntime("No local actor has been initialized yet")
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return _current_actor
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_conc_name_getters = {
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'task': trio.lowlevel.current_task,
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'actor': current_actor
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}
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class ActorContextInfo(Mapping):
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"Dyanmic lookup for local actor and task names"
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_context_keys = ('task', 'actor')
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def __len__(self):
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return len(self._context_keys)
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def __iter__(self):
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return iter(self._context_keys)
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def __getitem__(self, key: str) -> str:
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try:
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return _conc_name_getters[key]().name # type: ignore
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except RuntimeError:
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# no local actor/task context initialized yet
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return f'no {key} context'
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def is_main_process() -> bool:
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"""Bool determining if this actor is running in the top-most process.
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"""
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return mp.current_process().name == 'MainProcess'
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def debug_mode() -> bool:
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"""Bool determining if "debug mode" is on which enables
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remote subactor pdb entry on crashes.
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"""
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return bool(_runtime_vars['_debug_mode'])
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def is_root_process() -> bool:
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return _runtime_vars['_is_root']
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