英文:
Using Matlab DLL in Go instead Python
问题
我正在使用由Matlab Simulink/Codegen生成的DLL模型。
这段代码在Python中运行得很好：
import ctypesreal_T = ctypes.c_double# 导入DLLdll = ctypes.windll.LoadLibrary("./simulink.dll")# 模拟dll.initialize() # 初始化for i in range(10):mdlInput = real_T.in_dll(dll, "my_custom_input")mdlInput.value = i# 步进dll.step() # 步进# 获取输出mdlOutput = real_T.in_dll(dll, "my_custom_output")print(mdlOutput.value)dll.terminate() # 结束模拟
我只想将上面的代码翻译成Go语言以提高性能。问题是syscall.syscall不识别real_T (C.Double)类型，无法返回double而不是指针。
在Go语言中如何设置"my_custom_input"的值并读取"my_custom_output"的值？
英文:
I'm using a DLL model generated by Matlab Simulink/Codegen.
The code works pretty well in Python:
import ctypesreal_T = ctypes.c_double# Importa a DLLdll = ctypes.windll.LoadLibrary("./simulink.dll")# Simulatedll.initialize() # Initfor i in range(10):mdlInput = (real_T).in_dll(dll, "my_custom_input")mdlInput.value = i# Stepdll.step() # step# get outputmdlOutput = (real_T).in_dll(dll, "my_custom_output")print(mdlOutput.value)dll.terminate() # end of simulation
I just want to translate the code above to Go to increase performance. The problem is that syscall.syscall does not recognize the real_T (C.Double) type to return a double instead of a pointer.
How do I set the "my_custom_input" value and read the "my_custom_output" value in Go?
答案1
得分: 1
刚刚发现了一种使用LazyDll的新解决方案。
完整的代码如下：
package mainimport ("log""syscall""unsafe")func main() {dll := syscall.NewLazyDLL(".\\simulink.dll") // 使用LazyDll加载DLLdll.NewProc("initialize").Call() // 调用DLL中的initialize方法// 现在获取自定义输入的指针customInput := (*float64)(unsafe.Pointer(dll.NewProc("my_custom_input").Addr()))// 更新自定义输入的值*customInput = 1.23// 调用DLL中的step方法dll.NewProc("step").Call() // 调用DLL中的step方法// 现在获取自定义输出的指针并显示其值customOutput := (*float64)(unsafe.Pointer(dll.NewProc("my_custom_output").Addr()))// 打印输出的值log.Print(*customOutput)// 终止DLL的执行dll.NewProc("terminate").Call() // 调用DLL中的terminate方法}
以上是要翻译的内容。
英文:
Just found a new solution using LazyDll.
The complete code as:
package mainimport ("log""syscall""unsafe")func main() {dll = syscall.NewLazyDLL(".\\simulink.dll") // Load DLL as LazyDlldll.NewProc("initialize").Call() // Call initialize method from dll// Now get pointer to custom inputcustomInput := (*float64)(unsafe.Pointer(dll.NewProc("my_custom_input").Addr()))// Update custom Input Value*customInput := 1.23// Call the step method from dlldll.NewProc("step").Call() // Call step method from dll// Now get pointer to custom output and show it's valuecustomOutput := (*float64)(unsafe.Pointer(dll.NewProc("my_custom_output").Addr()))// Print the value of outputlog.Print(*customOutput)// Terminate the dll executiondll.NewProc("terminate").Call() // Call terminate method from dll}
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论