JNA Struct和指针映射

Question

How does one map the function below to java?

What this function does:
1) Populates the struct RecBuff
2) Updates status

How do I map to a boolean pointer in Java and access the struct data updated by the function?

Answer 1

I was searching for another issue concerning JNA and structs, and Google redirected me here. I hope this helps.

From JNA API

To pass a structure by value, first define the structure, then define an empty class from that which implements Structure.ByValue. Use the ByValue class as the argument or return type.

 // Original C code typedef struct _Point { int x, y; } Point; Point translate(Point pt, int dx, int dy); // Equivalent JNA mapping class Point extends Structure { public static class ByValue extends Point implements Structure.ByValue { } public int x, y; } Point.ByValue translate(Point.ByValue pt, int x, int y); ... Point.ByValue pt = new Point.ByValue(); Point result = translate(pt, 100, 100); 

Answer 2

You can use the ByReference class to pass values by reference. Presuming BOOL is an int you can use IntegerByReference.