Issue #26801: Added C implementation of asyncio.Future.

Original patch by Yury Selivanov.
This commit is contained in:
INADA Naoki 2016-10-09 14:44:47 +09:00
parent 518599b24c
commit 9e4e38ecd2
7 changed files with 1101 additions and 37 deletions

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@ -120,6 +120,46 @@ def isfuture(obj):
return getattr(obj, '_asyncio_future_blocking', None) is not None
def _format_callbacks(cb):
"""helper function for Future.__repr__"""
size = len(cb)
if not size:
cb = ''
def format_cb(callback):
return events._format_callback_source(callback, ())
if size == 1:
cb = format_cb(cb[0])
elif size == 2:
cb = '{}, {}'.format(format_cb(cb[0]), format_cb(cb[1]))
elif size > 2:
cb = '{}, <{} more>, {}'.format(format_cb(cb[0]),
size-2,
format_cb(cb[-1]))
return 'cb=[%s]' % cb
def _future_repr_info(future):
# (Future) -> str
"""helper function for Future.__repr__"""
info = [future._state.lower()]
if future._state == _FINISHED:
if future._exception is not None:
info.append('exception={!r}'.format(future._exception))
else:
# use reprlib to limit the length of the output, especially
# for very long strings
result = reprlib.repr(future._result)
info.append('result={}'.format(result))
if future._callbacks:
info.append(_format_callbacks(future._callbacks))
if future._source_traceback:
frame = future._source_traceback[-1]
info.append('created at %s:%s' % (frame[0], frame[1]))
return info
class Future:
"""This class is *almost* compatible with concurrent.futures.Future.
@ -172,45 +212,10 @@ class Future:
if self._loop.get_debug():
self._source_traceback = traceback.extract_stack(sys._getframe(1))
def __format_callbacks(self):
cb = self._callbacks
size = len(cb)
if not size:
cb = ''
def format_cb(callback):
return events._format_callback_source(callback, ())
if size == 1:
cb = format_cb(cb[0])
elif size == 2:
cb = '{}, {}'.format(format_cb(cb[0]), format_cb(cb[1]))
elif size > 2:
cb = '{}, <{} more>, {}'.format(format_cb(cb[0]),
size-2,
format_cb(cb[-1]))
return 'cb=[%s]' % cb
def _repr_info(self):
info = [self._state.lower()]
if self._state == _FINISHED:
if self._exception is not None:
info.append('exception={!r}'.format(self._exception))
else:
# use reprlib to limit the length of the output, especially
# for very long strings
result = reprlib.repr(self._result)
info.append('result={}'.format(result))
if self._callbacks:
info.append(self.__format_callbacks())
if self._source_traceback:
frame = self._source_traceback[-1]
info.append('created at %s:%s' % (frame[0], frame[1]))
return info
_repr_info = _future_repr_info
def __repr__(self):
info = self._repr_info()
return '<%s %s>' % (self.__class__.__name__, ' '.join(info))
return '<%s %s>' % (self.__class__.__name__, ' '.join(self._repr_info()))
# On Python 3.3 and older, objects with a destructor part of a reference
# cycle are never destroyed. It's not more the case on Python 3.4 thanks
@ -426,6 +431,21 @@ def _copy_future_state(source, dest):
dest.set_result(result)
try:
import _futures
except ImportError:
pass
else:
_futures._init_module(
traceback.extract_stack,
events.get_event_loop,
_future_repr_info,
InvalidStateError,
CancelledError)
Future = _futures.Future
def _chain_future(source, destination):
"""Chain two futures so that when one completes, so does the other.

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@ -10,6 +10,9 @@ What's New in Python 3.6.0 beta 2
Core and Builtins
-----------------
- Issue #26801: Added C implementation of asyncio.Future.
Original patch by Yury Selivanov.
- Issue #28379: Added sanity checks and tests for PyUnicode_CopyCharacters().
Patch by Xiang Zhang.

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@ -181,6 +181,7 @@ _symtable symtablemodule.c
#_datetime _datetimemodule.c # datetime accelerator
#_bisect _bisectmodule.c # Bisection algorithms
#_heapq _heapqmodule.c # Heap queue algorithm
#_futures _futuresmodule.c # Fast asyncio Future
#unicodedata unicodedata.c # static Unicode character database

1034
Modules/_futuresmodule.c Normal file

File diff suppressed because it is too large Load Diff

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@ -221,6 +221,7 @@
<ClCompile Include="..\Modules\_collectionsmodule.c" />
<ClCompile Include="..\Modules\_csv.c" />
<ClCompile Include="..\Modules\_functoolsmodule.c" />
<ClCompile Include="..\Modules\_futuresmodule.c" />
<ClCompile Include="..\Modules\_heapqmodule.c" />
<ClCompile Include="..\Modules\_json.c" />
<ClCompile Include="..\Modules\_localemodule.c" />

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@ -470,6 +470,9 @@
<ClCompile Include="..\Modules\_functoolsmodule.c">
<Filter>Modules</Filter>
</ClCompile>
<ClCompile Include="..\Modules\_futuresmodule.c">
<Filter>Modules</Filter>
</ClCompile>
<ClCompile Include="..\Modules\_heapqmodule.c">
<Filter>Modules</Filter>
</ClCompile>

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@ -656,6 +656,8 @@ class PyBuildExt(build_ext):
depends=['unicodedata_db.h', 'unicodename_db.h']) )
# _opcode module
exts.append( Extension('_opcode', ['_opcode.c']) )
# Fast asyncio Future implementation
exts.append( Extension("_futures", ["_futuresmodule.c"]) )
# Modules with some UNIX dependencies -- on by default:
# (If you have a really backward UNIX, select and socket may not be