CTRL + C不会在Python中使用CTYPES中断对共享库的调用 [英] CTRL+C doesn't interrupt call to shared-library using CTYPES in Python

问题描述

当调用在C共享库（动态库）中执行的循环时，Python将不会收到KeyboardInterrupt，并且没有任何响应（或处理）CTRL + C。

When calling a loop being performed in a C shared-library (dynamic library), Python will not receive a KeyboardInterrupt, and nothing will respond (or handle) CTRL+C.

我该怎么办？

推荐答案

除非您使用 PyDLL 或 PYFUNCTYPE ； GIL在ctypes调用期间被释放。因此，如果C代码未安装自己的信号处理程序，Python解释器应通过在主线程中引发 KeyboardInterrupt 来处理SIGINT。

Unless you use PyDLL or PYFUNCTYPE; the GIL is released during the ctypes calls. Therefore the Python interpreter should handle SIGINT by raising KeyboardInterrupt in the main thread if the C code doesn't install its own signal handler.

允许Python代码在主线程中运行；您可以将ctypes调用放入后台线程中：

To allow the Python code to run in the main thread; you could put the ctypes call into a background thread:

import threading

t = threading.Thread(target=ctypes_call, args=[arg1, arg2, ...])
t.daemon = True
t.start()
while t.is_alive(): # wait for the thread to exit
    t.join(.1)

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