mirror of https://github.com/python/cpython
110 lines
3.3 KiB
Python
110 lines
3.3 KiB
Python
__all__ = 'iscoroutinefunction', 'iscoroutine'
|
|
|
|
import collections.abc
|
|
import inspect
|
|
import os
|
|
import sys
|
|
import types
|
|
|
|
|
|
def _is_debug_mode():
|
|
# See: https://docs.python.org/3/library/asyncio-dev.html#asyncio-debug-mode.
|
|
return sys.flags.dev_mode or (not sys.flags.ignore_environment and
|
|
bool(os.environ.get('PYTHONASYNCIODEBUG')))
|
|
|
|
|
|
# A marker for iscoroutinefunction.
|
|
_is_coroutine = object()
|
|
|
|
|
|
def iscoroutinefunction(func):
|
|
"""Return True if func is a decorated coroutine function."""
|
|
return (inspect.iscoroutinefunction(func) or
|
|
getattr(func, '_is_coroutine', None) is _is_coroutine)
|
|
|
|
|
|
# Prioritize native coroutine check to speed-up
|
|
# asyncio.iscoroutine.
|
|
_COROUTINE_TYPES = (types.CoroutineType, collections.abc.Coroutine)
|
|
_iscoroutine_typecache = set()
|
|
|
|
|
|
def iscoroutine(obj):
|
|
"""Return True if obj is a coroutine object."""
|
|
if type(obj) in _iscoroutine_typecache:
|
|
return True
|
|
|
|
if isinstance(obj, _COROUTINE_TYPES):
|
|
# Just in case we don't want to cache more than 100
|
|
# positive types. That shouldn't ever happen, unless
|
|
# someone stressing the system on purpose.
|
|
if len(_iscoroutine_typecache) < 100:
|
|
_iscoroutine_typecache.add(type(obj))
|
|
return True
|
|
else:
|
|
return False
|
|
|
|
|
|
def _format_coroutine(coro):
|
|
assert iscoroutine(coro)
|
|
|
|
def get_name(coro):
|
|
# Coroutines compiled with Cython sometimes don't have
|
|
# proper __qualname__ or __name__. While that is a bug
|
|
# in Cython, asyncio shouldn't crash with an AttributeError
|
|
# in its __repr__ functions.
|
|
if hasattr(coro, '__qualname__') and coro.__qualname__:
|
|
coro_name = coro.__qualname__
|
|
elif hasattr(coro, '__name__') and coro.__name__:
|
|
coro_name = coro.__name__
|
|
else:
|
|
# Stop masking Cython bugs, expose them in a friendly way.
|
|
coro_name = f'<{type(coro).__name__} without __name__>'
|
|
return f'{coro_name}()'
|
|
|
|
def is_running(coro):
|
|
try:
|
|
return coro.cr_running
|
|
except AttributeError:
|
|
try:
|
|
return coro.gi_running
|
|
except AttributeError:
|
|
return False
|
|
|
|
coro_code = None
|
|
if hasattr(coro, 'cr_code') and coro.cr_code:
|
|
coro_code = coro.cr_code
|
|
elif hasattr(coro, 'gi_code') and coro.gi_code:
|
|
coro_code = coro.gi_code
|
|
|
|
coro_name = get_name(coro)
|
|
|
|
if not coro_code:
|
|
# Built-in types might not have __qualname__ or __name__.
|
|
if is_running(coro):
|
|
return f'{coro_name} running'
|
|
else:
|
|
return coro_name
|
|
|
|
coro_frame = None
|
|
if hasattr(coro, 'gi_frame') and coro.gi_frame:
|
|
coro_frame = coro.gi_frame
|
|
elif hasattr(coro, 'cr_frame') and coro.cr_frame:
|
|
coro_frame = coro.cr_frame
|
|
|
|
# If Cython's coroutine has a fake code object without proper
|
|
# co_filename -- expose that.
|
|
filename = coro_code.co_filename or '<empty co_filename>'
|
|
|
|
lineno = 0
|
|
|
|
if coro_frame is not None:
|
|
lineno = coro_frame.f_lineno
|
|
coro_repr = f'{coro_name} running at {filename}:{lineno}'
|
|
|
|
else:
|
|
lineno = coro_code.co_firstlineno
|
|
coro_repr = f'{coro_name} done, defined at {filename}:{lineno}'
|
|
|
|
return coro_repr
|