已回答 使用dll的FatalExecutionEngineError

[Maylar]

我有一个要在C＃应用程序中使用的第三方dll。我有C ++中的示例代码，包括函数声明，并且创建了一个控制台应用程序，并用（我认为）等效的数据类型和我自己的printf（）进行了修改。当我运行该应用程序时，它会在第一个函数调用时出现致命异常而窒息，

发生FatalExecutionEngineError
由于本机框架位于调用堆栈的顶部，因此无法评估表达式。

该功能的原始原型是这个

void __cdecl C_lin_coeff_batch(double z[], int32_t z_fpp, double theta[],
                               int32_t C_in[], bool inverse, int32_t C_fpp,
                               int32_t C_int_fpp, uint16_t method, int32_t
                               ci_mean_sel, double cc[], uint32_t cc_fpp[],
                               int32_t ccx[], double cci[], double best_fit[],
                               uint32_t cn_div[], uint32_t cn_shift[],
                               uint32_t n_samples, int32_t n_sample_x_devices,
                               int32_t n_cc, int32_t n_cn_div, int32_t n_cn_shift);

我翻译成这个

[DllImport("linearize_r01.dll")]
        public static extern void c_lin_coeff_dut(Int32[] C_in, double[] z, double[] theta,
        Int32 C_fpp, Int32 C_int_fpp, Int32 z_fpp, int inverse,
        ref double[] cc, ref UInt32[] cc_fpp, ref Int32[] ccx, ref double[] cci,
        ref double[] error_vs_z, ref UInt32[] cn_div, ref Int32[] cn_shift,
        Int32 n_samples, Int32 n_cc, Int32 n_cn_div, Int32 n_cn_shift);

谁能给我指导以使它起作用？

谢谢

戴夫

 

[跳伞]

Are you sure you posted the right functions? The C function looks to be named C_lin_coeff_batch, but the P/Invoke declaration you posted is for c_lin_coeff_dut. Furthermore, the C function's parameters starts off with an array of doubles, but your P/Invoke starts off with an array of Int32s.

 

[Maylar]

Are you sure you posted the right functions? The C function looks to be named C_lin_coeff_batch, but the P/Invoke declaration you posted is for c_lin_coeff_dut. Furthermore, the C function's parameters starts off with an array of doubles, but your P/Invoke starts off with an array of Int32s.

糟糕，我的糟糕。我从C ++标头复制了错误的声明。这是我尝试复制的原始原型：

void __cdecl c_lin_coeff_dut(int32_t C_in[], double z[], double theta[],
        int32_t C_fpp, int32_t C_int_fpp, int32_t z_fpp, int inverse,
        double cc[], uint32_t cc_fpp[], int32_t ccx[], double cci[],
        double error_vs_z[], uint32_t cn_div[], int32_t cn_shift[],
        int32_t n_samples, int32_t n_cc, int32_t n_cn_div, int32_t n_cn_shift);

 

[跳伞]

I assume there is a reason why some of the arrays are declared as ref while others are not.

Anyway, I would first start off by trying to match the calling convention. The DllImport attribute takes a calling convention. You probably should pass in the fact that the function is a C calling convention instead of the StdCall or WinApi calling convention that C＃ normally expects.

 

[Maylar]

非常感谢你。我添加了调用约定CallingConvention.Cdecl并消除了ref关键字，并且代码不再崩溃。我假设任何输出参数都应按照C＃约定声明为ref或out。我想无论如何数组都是通过引用传递的，所以没关系。

再次感谢。

戴夫