Class `AdjustableSemaphore`

A semaphore whose value may be tuned after instantiation.

Function `bg(func, daemon=None, name=None, no_start=False, no_logexc=False)`

Dispatch the callable func in its own Thread; return the Thread.

Parameters:

func: callable to run in its own Thread.
daemon: optional argument specifying the .daemon attribute.
name: optional argument specifying the Thread name.
no_start: optional argument, default False. If true, do not start the Thread.
no_logexc: if false (default False), wrap func in @logexc.

Class `LockableMixin`

Trite mixin to control access to an object via its ._lock attribute. Exposes the ._lock as the property .lock. Presents a context manager interface for obtaining an object's lock.

Function `locked(func)`

A decorator for monitor functions that must run within a lock. Relies upon a ._lock attribute for locking.

Function `locked_property(func, lock_name='_lock', prop_name=None, unset_object=None)`

A thread safe property whose value is cached. The lock is taken if the value needs to computed.

Function `via(cmanager, func, *a, **kw)`

Return a callable that calls the supplied func inside a with statement using the context manager cmanager. This intended use case is aimed at deferred function calls.

Class `WorkerThreadPool`

MRO: cs.resources.MultiOpenMixin, cs.obj.O
A pool of worker threads to run functions.

Method `WorkerThreadPool.init(self, name=None, max_spare=4)`

Initialise the WorkerThreadPool.

Paramaters: name: optional name for the pool max_spare: maximum size of each idle pool (daemon and non-daemon)

Class `WTPoolEntry`

MRO: builtins.tuple
WTPoolEntry(thread, queue)

Release Log

Release 20190812: bg: compute default name before wrapping func in @logexc.

Release 20190729: bg: provide default name, run callable inside Pfx, add optional no_logexc=False param preventing @logec wrapper if true.

Release 20190422: bg(): new optional no_start=False keyword argument, preventing Thread.start if true

Release 20190102: Drop some unused classes. New LockableMixin, presenting a context manager and a .lock property.

Release 20160828: Use "install_requires" instead of "requires" in DISTINFO.

Release 20160827: Replace bare "excepts" with "except BaseException". Doc updates. Other minor improvements.

Release 20150115: First PyPI release.

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