[英]How to pass a large structure through JNI from C to JAVA
Is it possible to pass a large Structure through JNI from C to Java? 是否可以通过JNI将大型结构从C传递到Java?
Can somebody please give me the possible solutions? 有人可以给我可能的解决方案吗?
Declare a pointer to the struct in your java class like so: 在Java类中声明一个指向struct的指针,如下所示:
protected long ptrToX;
Next, to set it: 接下来,进行设置:
(*env)->GetFieldID(...)
(*env)->GetFieldID(...)
获取字段ID (*env)->GetLongField(...)
(*env)->GetLongField(...)
获取指针 (*env)->SetLongField(...)
(*env)->SetLongField(...)
设置指针 To get it, just follow the first two steps mentioned above. 要获得它,只需按照上面提到的前两个步骤。
Always remember to include a finaliser that will take care of deallocating the pointer when the object is garbage-collected. 始终记住要包括一个终结器,该终结器将在对象被垃圾回收时负责释放指针。 Alternatively, if you do not want to incur the performance hit incurred by using finalisers, just provide a terminate() method that deallocates the pointer.
另外,如果您不想引起使用终结器引起的性能下降,只需提供一个终止指针的terminate()方法即可。
最好您切换到JNA,这是从C到JAVA编程的便捷方法。
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