英文:
JNAerator generates method with __stdcall return value
问题
我目前在为我必须使用的DLL生成JNA封装器而感到困扰。
这些DLL和相应的.h文件由IBM（Spectrum Protect，也称为Tivoli Storage Manager或ADSTAR）提供，但我无论如何都不能正确使用JNAerator。
示例：
以下是其中一个头文件的摘录：
extern dsInt16_t DSMLINKAGE dsmInitEx(
dsUint32_t *dsmHandleP,
dsmInitExIn_t *dsmInitExInP,
dsmInitExOut_t *dsmInitExOutP
);
而dsInt16_t原来是在单独的.h文件中定义的：
typedef signed short dsInt16_t;
运行JNAerator后的结果并不如我所预期：
Tsmapi64Library.__stdcall dsmInitEx(NativeLongByReference dsmHandleP, dsmInitExIn_t dsmInitExInP, dsmInitExOut_t dsmInitExOutP);
返回类型定义如下：
public static class __stdcall extends PointerType {
...
};
请注意，我上次使用C语言是在学校，那是20多年前的事情，所以我肯定有点生疏。
我在这里漏掉了什么？我本希望返回值是dsInt16_t或short，例如。
后续问题：DLL提供了一个解释返回代码（前面提到的dsInt16_t返回值）的方法。
同样，这是.h文件中的定义：
extern dsInt16_t DSMLINKAGE dsmRCMsg(
dsUint32_t dsmHandle,
dsInt16_t dsmRC,
char *msg
);
...这是生成的Java代码：
Tsmapi64Library.__stdcall dsmRCMsg(NativeLong dsmHandle, dsInt16_t dsmRC, ByteBuffer msg);
因此，它将C参数类型dsInt16_t“翻译”为Java类型dsInt16_t，这很好。
由于这个Java类型dsInt16_t是一个接口，我该如何创建这个类型的实例以便我可以实际调用该方法？（我猜一旦第一个问题解决了，这个问题就会过时。）
英文:
I'm currently struggling to generate a JNA wrapper for a DLL that I have to use.
The DLL and the corresponding .h files are provided by IBM (Spectrum Protect aka Tivoli Storage Manager or ADSTAR) and for the life of me, I cannot use JNAerator properly, as it seems.
Example:
This is an excerpt of one of the header files:
extern dsInt16_t DSMLINKAGE dsmInitEx(
dsUint32_t *dsmHandleP,
dsmInitExIn_t *dsmInitExInP,
dsmInitExOut_t *dsmInitExOutP
);
This dsInt16_t turns out to be defined in a separate .h file:
typedef signed short dsInt16_t;
The result after running JNAerator is not what I would have expected:
Tsmapi64Library.__stdcall dsmInitEx(NativeLongByReference dsmHandleP, dsmInitExIn_t dsmInitExInP, dsmInitExOut_t dsmInitExOutP);
The return type is defined as follows:
public static class __stdcall extends PointerType {
...
};
Mind you, last time I worked with C was in school, and that is 20+ years ago, so I am definitely a bit rusty.
What am I missing here? I would have hoped that the return value would be a dsInt16_t or short, for example.
A follow-up question: the DLL provides a method for explaining return codes (the aforementioned dsInt16_t return value).
Again, this is the definition in the .h file:
extern dsInt16_t DSMLINKAGE dsmRCMsg(
dsUint32_t dsmHandle,
dsInt16_t dsmRC,
char *msg
);
...and this is the resulting Java code:
Tsmapi64Library.__stdcall dsmRCMsg(NativeLong dsmHandle, dsInt16_t dsmRC, ByteBuffer msg);
So, it "translated" the C-parameter type dsInt16_t into the Java type dsInt16_t, which is nice.
Since this Java type dsInt16_t is an interface, how would I be able to create an instance of this type so that I could actually call the method? (I guess this question is obsolete once the first one is resolved.)
专注分享java语言的经验与见解，让所有开发者获益！
评论