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环境:Window 10,VS 2019, Python 2.7.12, 64bit
1,打开 VS 2019,新建C++ Windows 动态链接库工程 Example,加入下列文件,如果Python是64位的则在VS中 Solution platforms 选择 x64 编译成64位的 DLL;
Example.h
#pragma once #ifndef CPP_EXPORTS #define CPP_EXPORTS #endif #ifdef CPP_EXPORTS #define CPP_API _declspec(dllexport) #else #define CPP_API _declspec(dllimport) #endif #include <iostream> using namespace std; #ifdef __cplusplus extern "C" { #endif CPP_API int __cdecl getInt(); CPP_API const char* __cdecl getString(); CPP_API void __cdecl setString(const char* str); #ifdef __cplusplus } #endif
Example.cpp
#include "pch.h" #include "Example.h" CPP_API int __cdecl getInt() { return 5; } CPP_API const char* __cdecl getString() { return "hello"; } CPP_API void __cdecl setString(const char* str) { cout << str << endl; }
编译,得到 Example.dll
2, 打开 Command,cd 到 Example.dll 所在目录,输入 Python2,进入python环境
>>> from ctypes import * >>> dll = CDLL("Example.dll") >>> print dll.getInt() 5 >>> getStr = dll.getString >>> getStr.restype = c_char_p >>> pChar = getStr() >>> print c_char_p(pChar).value hello >>> setStr = dll.setString >>> setStr.argtypes = [c_char_p] >>> pStr = create_string_buffer("hello") >>> setStr(pStr) hello -1043503984
源自https://www.cnblogs.com/gujf2016/p/11282352.html