Question

我试图从非托管dll调用方法，而且我被困了。对于fmi2Type和fmi2Boolean我可以使用byte吗？回调函数（以及指向它们的指针）应如何在C＃中显示？

方法I尝试呼叫是：

fmi2Component fmi2Instantiate(fmi2String instanceName,
                    fmi2Type fmuType, 
                    fmi2String fmuGUID, 
                    fmi2String fmuResourceLocation, 
                    const fmi2CallbackFunctions* functions, 
                    fmi2Boolean visible, 
                    fmi2Boolean loggingOn)

类型说明如下：

typedef void*           fmi2Component;               /* Pointer to FMU instance       */
typedef void*           fmi2ComponentEnvironment;    /* Pointer to FMU environment    */
typedef void*           fmi2FMUstate;                /* Pointer to internal FMU state */
typedef unsigned int    fmi2ValueReference;
typedef double          fmi2Real   ;
typedef int             fmi2Integer;
typedef int             fmi2Boolean;
typedef char            fmi2Char;
typedef const fmi2Char* fmi2String;
typedef char            fmi2Byte;

typedef struct {
   const fmi2CallbackLogger         logger;
   const fmi2CallbackAllocateMemory allocateMemory;
   const fmi2CallbackFreeMemory     freeMemory;
   const fmi2StepFinished           stepFinished;
   const fmi2ComponentEnvironment   componentEnvironment;
} fmi2CallbackFunctions;

typedef enum {
    fmi2ModelExchange,
    fmi2CoSimulation
} fmi2Type;

typedef void      (*fmi2CallbackLogger)        (fmi2ComponentEnvironment,     fmi2String, fmi2Status, fmi2String, fmi2String, ...);
typedef void*     (*fmi2CallbackAllocateMemory)(size_t, size_t);
typedef void      (*fmi2CallbackFreeMemory)    (void*);
typedef void      (*fmi2StepFinished)          (fmi2ComponentEnvironment,     fmi2Status);

对于回调，我为每个回调制作了包含类和委托的回调。

public class FMICallbackFunctions
{
    public delegate void FMILibrary_FMICallbackLogger(IntPtr fmiComponent, string instanceName, int status, string category, string message, IntPtr parameters);

    public delegate IntPtr FMILibrary_FMICallbackAllocateMemory(int numberOfObjects, int size);

    public delegate void FMILibrary_FMICallbackFreeMemory(IntPtr @object);

    public delegate void FMILibrary_FMIStepFinished(IntPtr fmiComponent, int status);

    public FMICallbackFunctions(FMILibrary_FMICallbackLogger logger, FMILibrary_FMICallbackAllocateMemory allocateMemory, FMILibrary_FMICallbackFreeMemory freeMemory, FMILibrary_FMIStepFinished stepFinished)
        : base()
    {
        this.logger = logger;
        this.allocateMemory = allocateMemory;
        this.freeMemory = freeMemory;
        this.stepFinished = stepFinished;
    }
}

然后初始化该类并尝试将其传递给非托管方法调用

FMICallbackFunctions callbackFunctions = new FMICallbackFunctions(logger, allocateMemory, freeMemory, stepFinished);

但是收到错误：尝试读取或写入受保护的内存。这通常表明其他内存已损坏。

我认为它导致错误的回调参数。有没有人提示可能有什么问题？

编组C类型到C＃用于FMU dll方法调用

0 个答案: