如何从java JVM卸载库(DLL)

#include <jni.h>
#include <dlfcn.h>

JNIEXPORT jint JNICALL Java_mypackage_MyClass_unloadLibrary(JNIEnv *env, jobject obj) {
    void *handle;
    int (*unloadFunc)(void);
    char *error;

    handle = dlopen("mydll.so", RTLD_LAZY);
    if (!handle) {
        fprintf(stderr, "%s\n", dlerror());
        return -1;
    }

    unloadFunc = dlsym(handle, "unload");
    if ((error = dlerror()) != NULL) {
        fprintf(stderr, "%s\n", error);
        return -1;
    }

    return unloadFunc();
}

public class MyClass {
    static {
        System.loadLibrary("mylib");
    }

    public native int unloadLibrary();

    public static void main(String[] args) {
        MyClass obj = new MyClass();
        int result = obj.unloadLibrary();
        if (result == 0) {
            System.out.println("Library unloaded successfully.");
        } else {
            System.out.println("Failed to unload library.");
        }
    }
}