twisted.internet.defer._ConcurrencyPrimitive

class documentation

class _ConcurrencyPrimitive(ABC): (source)

Known subclasses: twisted.internet.defer.DeferredLock, twisted.internet.defer.DeferredSemaphore

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Undocumented

Method __aenter__ We can be used as an asynchronous context manager.
Method __aexit__ Undocumented
Method __init__ Undocumented
Method acquire Undocumented
Method release Undocumented
Method run Acquire, run, release.
Instance Variable waiting Undocumented
Method _releaseAndReturn Undocumented
def __aenter__(self: Self) -> Deferred[Self]: (source)

We can be used as an asynchronous context manager.

def __aexit__(self, __exc_type: type[BaseException] | None, __exc_value: BaseException | None, __traceback: TracebackType | None) -> Deferred[Literal[False]]: (source)

Undocumented

def __init__(self: Self): (source)
overridden in twisted.internet.defer.DeferredSemaphore

Undocumented

@abstractmethod
def acquire(self: Self) -> Deferred[Self]: (source)
overridden in twisted.internet.defer.DeferredLock, twisted.internet.defer.DeferredSemaphore

Undocumented

@abstractmethod
def release(self): (source)
overridden in twisted.internet.defer.DeferredLock, twisted.internet.defer.DeferredSemaphore

Undocumented

@overload
def run(self: Self, /, f: Callable[_P, Deferred[_T]], *args: _P.args, **kwargs: _P.kwargs) -> Deferred[_T]:
@overload
def run(self: Self, /, f: Callable[_P, Coroutine[Deferred[Any], Any, _T]], *args: _P.args, **kwargs: _P.kwargs) -> Deferred[_T]:
@overload
def run(self: Self, /, f: Callable[_P, _T], *args: _P.args, **kwargs: _P.kwargs) -> Deferred[_T]:
(source)

Acquire, run, release.

This method takes a callable as its first argument and any number of other positional and keyword arguments. When the lock or semaphore is acquired, the callable will be invoked with those arguments.

The callable may return a Deferred; if it does, the lock or semaphore won't be released until that Deferred fires.

Returns
Deferred[_T]Deferred of function result.
waiting: list[Deferred[Self]] = (source)

Undocumented

def _releaseAndReturn(self, r: _T) -> _T: (source)

Undocumented