JNA捕捉异常 [英] JNA Catching Exceptions

问题描述

我有一个快速的问题，关于处理在JNA下的库抛出的异常...

当我在底层本机代码中抛出一个异常时，JNA得到一个无效内存访问错误。我假设这是因为C库不能通过它的堆栈抛出一个异常（实际上是C ++ / CLR但有C导出）？那么没有什么真正的方式来报告Java的异常？或者应该工作，我只是在做一些令人难以置信的错误的事情？

  DllExport void Initialize（char * dir）
 {
 throw gcnew System :: Exception（Testing）; 
} 
  

Java可以检测到这些抛出的异常，我想我实际上可以看看将内存指针传递到我所有的C导出中，并检查它们是否为空，但是似乎是一个迂回的方式。

解决方案

您需要自己处理c ++异常，而是构建可以传递给代码的java端的java异常。

I have a quick question about dealing with exceptions being thrown by libraries under JNA...

When I throw an exception in the underlying native code, JNA gets a invalid memory access error. I'm assuming this is because C libraries cannot throw an exception up through it's stack (it's actually C++/CLR but has C exports)? So is there no real way to report the exception to Java? Or "should it work" and I'm just doing something incredibly wrong?

DllExport void Initialize(char* dir)
{
    throw gcnew System::Exception("Testing");
}

It would be nice for Java to be able to detect these thrown exceptions, and I guess I could actually look into passing a memory pointer into all my C exports and check to see if those are null or not, but seems like a roundabout way.

解决方案

You need to handle the c++ exception yourself and instead build a java exception which can be passed to the java side of the code.

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