怎么通过JNI访问AgU2701A.dll？

嗨，我为AgU2702A示波器的IVI-C驱动程序编写了一个JNI Wrapper。
驱动程序DLL称为AgU2701A.dll。
包装器工作正常，除非我在我的java应用程序中使用两个不同的线程。
当我拨打电话时
AgU2701A_GetAttributeViString他们将成功并向我提供所需的信息，例如
驱动程序描述或驱动程序修
但是，调用AgU2701A_SetAttributeViReal64来设置水平“每条记录的时间”失败，状态为0x80000000。
如果我只从一个Java线程使用相同的包装器DLL，一切正常。
作为我在JNI dll中如何实现此包装器的示例，请观察：JNIEXPORT jobject JNICALL Java_com_test_setAttributeViReal64（JNIEnv * env，jclass obj，jobject Vi，jstring RepCapIdentifier，jlong​​ AttributeId，jdouble AttributeValue）{//返回值的字段。
jobject viStatusWrapperObjectRetVal = NULL;
ViBoolean lock = 0;
const char * repCapIdentifier;
if（globalWrappersInitialized）{jint viSession = getViSessionId（env，Vi）;
repCapIdentifier = env-> GetStringUTFChars（RepCapIdentifier，0）;
//本机驱动程序调用。
status = AgU2701A_LockSession（viSession，＆amp; lock）;
status = AgU2701A_SetAttributeViReal64（viSession，repCapIdentifier，（ViAttr）AttributeId，（ViReal64）AttributeValue）;
AgU2701A_UnlockSession（viSession，＆amp; lock）;
//准备返回值。
viStatusWrapperObjectRetVal = env-> NewObject（viStatusWrapperClass，viStatusWrapperConstructor，status）;
} else {throwIviCException（env，NOT_INITIALIZED_MESSAGE）;
} return viStatusWrapperObjectRetVal;
我不知道这个错误代码号是什么意思，因为getError，error_mossage或query_error无法识别它。
如果有人知道这里发生了什么，请随时提交，我会检查。
此致，MaikEdited：Kiamur于2012年3月19日上午11:11



     以下为原文

  Hi,

I wrote a JNI Wrapper around the IVI-C driver for the AgU2702A oscilloscope. The driver dll is called AgU2701A.dll.

The wrapper works fine unless I use it from two different threads in my java application.

When I do calls to e.g. AgU2701A_GetAttributeViString they will succed and give me the requested information like e.g. driver description or driver revision. However, a call to AgU2701A_SetAttributeViReal64 for setting up the horizontal "time per record" fails with status 0x80000000.
If I use the same wrapper dll from just one Java thread, everything works fine.

As an example of how I implemented this wrapper in my JNI dll watch this:

JNIEXPORT jobject JNICALL Java_com_test_setAttributeViReal64
  (JNIEnv *env, jclass obj, jobject Vi, jstring RepCapIdentifier, jlong AttributeId, jdouble AttributeValue)
{
     // Field for return value.
     jobject viStatusWrapperObjectRetVal = NULL;
     ViBoolean lock = 0;

     const char *repCapIdentifier;

     if(globalWrappersInitialized)
     {
          jint viSession = getViSessionId(env, Vi);

          repCapIdentifier = env->GetStringUTFChars(RepCapIdentifier, 0);

          // Native driver call.
          status = AgU2701A_LockSession(viSession, &lock);
          status = AgU2701A_SetAttributeViReal64 (viSession, repCapIdentifier, (ViAttr) AttributeId, (ViReal64) AttributeValue);
          AgU2701A_UnlockSession(viSession, &lock);

          // Prepare return value.
          viStatusWrapperObjectRetVal = env->NewObject(viStatusWrapperClass, viStatusWrapperConstructor, status);
     }
     else
     {
          throwIviCException(env, NOT_INITIALIZED_MESSAGE);
     }

     return viStatusWrapperObjectRetVal;
}

I have no idea what this error code number means because it is not recognized by getError, error_mossage or query_error.

Please, if somebody has an idea what is going on here, feel free to submit it and I'll check.

Regards,
Maik

Edited by: Kiamur on Mar 19, 2012 11:11 AM