Export real functions for things that currently exist as macros / defines / global variables in the C code
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调研方向
没有指定文件、测试或具体的 API 条目。首先检查 C DLL API，查找所提到的宏、define 和全局变量；定义一组有限的函数替代方案，并验证所选项目已导出且可从更高层的 wrapper 使用。
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描述
Feature or enhancement
(A clear and concise description of your proposal.)
Pitch
I am writing a python wrapper in a higher level language using the C DLL API. Within certain higher level languages, it is not easily possible to access anything other than the exported functions from the DLL. Macros / defines / global variables are troublesome to interact with from the DLL.
So, If I only have easy access to the function API in my higher level language, type checking sort of becomes an issue due to things like PyList_Check being a macro and PyList_Type being a global variable. Exposing global variables (such as PyList_Type) through function APIs that just return a pointer to the data (for example) prevents a structure re layout from leaking out of the DLL... not to mention gives easier access to the data I need to call a type check function.
For things like PyList_Check that are macros, but are still useful for direct checks, they could be converted to a function API.
(Explain why this feature or enhancement should be implemented and how it would be used.
Add examples, if applicable.)
I do not suggest converting macros / defines cold turkey into a function API... obviously, that could break a lot of code for users of the C library. Instead, provide function alternatives to the items as a parallel API for those of us that can only really call DLL functions in our higher level language. As I go through some of the C API, I do notice areas where a macro and a function form of an API do exist in parallel. It would be nice if we could continue to extend that, especially for type checks.
Previous discussion
Apologies if this is discussed elsewhere. Move or edit as needed.
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