Use Case

This module was created to overcome limitations of Python’s built-in semaphore support. Specifically, the built-in semaphores:

• Can only be shared between python processes if a common parent python process coordinates

• Cannot be acquired by code written in other programming languages

Instead, this module provides wrappers for these low level Windows Semaphore APIs:

• CreateSemaphoreExW

• OpenSemaphoreW

• WaitForSingleObject

• ReleaseSemaphore

• CloseHandle

Since the Windows Semaphore API uses named semaphores to permit sharing between processes, you can now share your semaphore more freely. Check the documentation of those APIs for details about how semaphores behave on Windows.

Dependencies

This module requires no runtime dependencies.

See Also

Documentation:

• https://semaphore-win-ctypes.readthedocs.io/

Related Python standard library code:

• Python threading.Semaphore

• Python multiprocessing.Semaphore

• Python asyncio.Semaphore

Similar work on other platforms:

• POSIX IPC for better semaphores on POSIX (I.E. Linux, UNIX-like, etc.) OSes.

Other items:

• windows semaphore helper – C++ demo of working with Windows Semaphore APIs

Credits

This package was created with Cookiecutter and the audreyr/cookiecutter-pypackage project template.

0.1.2 (2021-03-14)

• Minor bug fixes

0.1.1 (2021-03-14)

• First release on PyPI.