cdef extern from "jni.h":

    ctypedef unsigned char   jboolean
    ctypedef signed char     jbyte
    ctypedef unsigned short  jchar
    ctypedef short           jshort
    ctypedef int             jint
    ctypedef long long       jlong
    ctypedef float           jfloat
    ctypedef double          jdouble
    ctypedef void*           jobject

    ctypedef jobject         jclass
    ctypedef jobject         jstring
    ctypedef jobject         jarray
    ctypedef jarray          jobjectArray
    ctypedef jarray          jbooleanArray
    ctypedef jarray          jbyteArray
    ctypedef jarray          jcharArray
    ctypedef jarray          jshortArray
    ctypedef jarray          jintArray
    ctypedef jarray          jlongArray
    ctypedef jarray          jfloatArray
    ctypedef jarray          jdoubleArray
    ctypedef jobject         jthrowable
    ctypedef jobject         jweak
    ctypedef jint            jsize

    ctypedef char const_char "const_char"
    ctypedef jchar const_jchar "const jchar"
    ctypedef jbyte const_jbyte "const jbyte"
    ctypedef jbyte const_jint "const jint"
    ctypedef jboolean const_jboolean "const jboolean"
    ctypedef jshort const_jshort "const jshort"
    ctypedef jlong const_jlong "const jlong"
    ctypedef jfloat const_jfloat "const jfloat"
    ctypedef jdouble const_jdouble "const jdouble"

    ctypedef struct JNINativeMethod:
        const_char* name
        const_char* signature
        void*       fnPtr

    ctypedef union jvalue:
        jboolean    z
        jbyte       b
        jchar       c
        jshort      s
        jint        i
        jlong       j
        jfloat      f
        jdouble     d
        jobject     l

    ctypedef enum jobjectRefType:
        JNIInvalidRefType = 0,
        JNILocalRefType = 1,
        JNIGlobalRefType = 2,
        JNIWeakGlobalRefType = 3


    # some opaque definitions
    ctypedef void *jmethodID
    ctypedef void *jfieldID

    ctypedef struct JNINativeInterface

    ctypedef JNINativeInterface* JNIEnv

    ctypedef struct JNINativeInterface:
        jint *GetVersion(JNIEnv *)
        jclass      (*DefineClass)(JNIEnv*, const_char*, jobject, const_jbyte*,
                            jsize)
        jclass      (*FindClass)(JNIEnv*, char*)

        jmethodID   (*FromReflectedMethod)(JNIEnv*, jobject)
        jfieldID    (*FromReflectedField)(JNIEnv*, jobject)
        # spec doesn't show jboolean parameter
        jobject     (*ToReflectedMethod)(JNIEnv*, jclass, jmethodID, jboolean)

        jclass      (*GetSuperclass)(JNIEnv*, jclass)
        jboolean    (*IsAssignableFrom)(JNIEnv*, jclass, jclass)

        # spec doesn't show jboolean parameter
        jobject     (*ToReflectedField)(JNIEnv*, jclass, jfieldID, jboolean)

        jint        (*Throw)(JNIEnv*, jthrowable)
        jint        (*ThrowNew)(JNIEnv *, jclass, const_char *)
        jthrowable  (*ExceptionOccurred)(JNIEnv*)
        void        (*ExceptionDescribe)(JNIEnv*)
        void        (*ExceptionClear)(JNIEnv*)
        void        (*FatalError)(JNIEnv*, const_char*)

        jint        (*PushLocalFrame)(JNIEnv*, jint)
        jobject     (*PopLocalFrame)(JNIEnv*, jobject)

        jobject     (*NewGlobalRef)(JNIEnv*, jobject)
        void        (*DeleteGlobalRef)(JNIEnv*, jobject)
        void        (*DeleteLocalRef)(JNIEnv*, jobject)
        jboolean    (*IsSameObject)(JNIEnv*, jobject, jobject)

        jobject     (*NewLocalRef)(JNIEnv*, jobject)
        jint        (*EnsureLocalCapacity)(JNIEnv*, jint)

        jobject     (*AllocObject)(JNIEnv*, jclass)
        jobject     (*NewObject)(JNIEnv*, jclass, jmethodID, ...)
        jobject     (*NewObjectV)(JNIEnv*, jclass, jmethodID, va_list)
        jobject     (*NewObjectA)(JNIEnv*, jclass, jmethodID, jvalue*)

        jclass      (*GetObjectClass)(JNIEnv*, jobject)
        jboolean    (*IsInstanceOf)(JNIEnv*, jobject, jclass)
        jmethodID   (*GetMethodID)(JNIEnv*, jclass, const_char*, const_char*)

        jobject     (*CallObjectMethod)(JNIEnv*, jobject, jmethodID, ...)
        jobject     (*CallObjectMethodV)(JNIEnv*, jobject, jmethodID, va_list)
        jobject     (*CallObjectMethodA)(JNIEnv*, jobject, jmethodID, jvalue*)
        jboolean    (*CallBooleanMethod)(JNIEnv*, jobject, jmethodID, ...)
        jboolean    (*CallBooleanMethodV)(JNIEnv*, jobject, jmethodID, va_list)
        jboolean    (*CallBooleanMethodA)(JNIEnv*, jobject, jmethodID, jvalue*)
        jbyte       (*CallByteMethod)(JNIEnv*, jobject, jmethodID, ...)
        jbyte       (*CallByteMethodV)(JNIEnv*, jobject, jmethodID, va_list)
        jbyte       (*CallByteMethodA)(JNIEnv*, jobject, jmethodID, jvalue*)
        jchar       (*CallCharMethod)(JNIEnv*, jobject, jmethodID, ...)
        jchar       (*CallCharMethodV)(JNIEnv*, jobject, jmethodID, va_list)
        jchar       (*CallCharMethodA)(JNIEnv*, jobject, jmethodID, jvalue*)
        jshort      (*CallShortMethod)(JNIEnv*, jobject, jmethodID, ...)
        jshort      (*CallShortMethodV)(JNIEnv*, jobject, jmethodID, va_list)
        jshort      (*CallShortMethodA)(JNIEnv*, jobject, jmethodID, jvalue*)
        jint        (*CallIntMethod)(JNIEnv*, jobject, jmethodID, ...)
        jint        (*CallIntMethodV)(JNIEnv*, jobject, jmethodID, va_list)
        jint        (*CallIntMethodA)(JNIEnv*, jobject, jmethodID, jvalue*)
        jlong       (*CallLongMethod)(JNIEnv*, jobject, jmethodID, ...)
        jlong       (*CallLongMethodV)(JNIEnv*, jobject, jmethodID, va_list)
        jlong       (*CallLongMethodA)(JNIEnv*, jobject, jmethodID, jvalue*)
        jfloat      (*CallFloatMethod)(JNIEnv*, jobject, jmethodID, ...)
        jfloat      (*CallFloatMethodV)(JNIEnv*, jobject, jmethodID, va_list)
        jfloat      (*CallFloatMethodA)(JNIEnv*, jobject, jmethodID, jvalue*)
        jdouble     (*CallDoubleMethod)(JNIEnv*, jobject, jmethodID, ...)
        jdouble     (*CallDoubleMethodV)(JNIEnv*, jobject, jmethodID, va_list)
        jdouble     (*CallDoubleMethodA)(JNIEnv*, jobject, jmethodID, jvalue*)
        void        (*CallVoidMethod)(JNIEnv*, jobject, jmethodID, ...)
        void        (*CallVoidMethodV)(JNIEnv*, jobject, jmethodID, va_list)
        void        (*CallVoidMethodA)(JNIEnv*, jobject, jmethodID, jvalue*)

        jobject     (*CallNonvirtualObjectMethod)(JNIEnv*, jobject, jclass,
                            jmethodID, ...)
        jobject     (*CallNonvirtualObjectMethodV)(JNIEnv*, jobject, jclass,
                            jmethodID, va_list)
        jobject     (*CallNonvirtualObjectMethodA)(JNIEnv*, jobject, jclass,
                            jmethodID, jvalue*)
        jboolean    (*CallNonvirtualBooleanMethod)(JNIEnv*, jobject, jclass,
                            jmethodID, ...)
        jboolean    (*CallNonvirtualBooleanMethodV)(JNIEnv*, jobject, jclass,
                            jmethodID, va_list)
        jboolean    (*CallNonvirtualBooleanMethodA)(JNIEnv*, jobject, jclass,
                            jmethodID, jvalue*)
        jbyte       (*CallNonvirtualByteMethod)(JNIEnv*, jobject, jclass,
                            jmethodID, ...)
        jbyte       (*CallNonvirtualByteMethodV)(JNIEnv*, jobject, jclass,
                            jmethodID, va_list)
        jbyte       (*CallNonvirtualByteMethodA)(JNIEnv*, jobject, jclass,
                            jmethodID, jvalue*)
        jchar       (*CallNonvirtualCharMethod)(JNIEnv*, jobject, jclass,
                            jmethodID, ...)
        jchar       (*CallNonvirtualCharMethodV)(JNIEnv*, jobject, jclass,
                            jmethodID, va_list)
        jchar       (*CallNonvirtualCharMethodA)(JNIEnv*, jobject, jclass,
                            jmethodID, jvalue*)
        jshort      (*CallNonvirtualShortMethod)(JNIEnv*, jobject, jclass,
                            jmethodID, ...)
        jshort      (*CallNonvirtualShortMethodV)(JNIEnv*, jobject, jclass,
                            jmethodID, va_list)
        jshort      (*CallNonvirtualShortMethodA)(JNIEnv*, jobject, jclass,
                            jmethodID, jvalue*)
        jint        (*CallNonvirtualIntMethod)(JNIEnv*, jobject, jclass,
                            jmethodID, ...)
        jint        (*CallNonvirtualIntMethodV)(JNIEnv*, jobject, jclass,
                            jmethodID, va_list)
        jint        (*CallNonvirtualIntMethodA)(JNIEnv*, jobject, jclass,
                            jmethodID, jvalue*)
        jlong       (*CallNonvirtualLongMethod)(JNIEnv*, jobject, jclass,
                            jmethodID, ...)
        jlong       (*CallNonvirtualLongMethodV)(JNIEnv*, jobject, jclass,
                            jmethodID, va_list)
        jlong       (*CallNonvirtualLongMethodA)(JNIEnv*, jobject, jclass,
                            jmethodID, jvalue*)
        jfloat      (*CallNonvirtualFloatMethod)(JNIEnv*, jobject, jclass,
                            jmethodID, ...)
        jfloat      (*CallNonvirtualFloatMethodV)(JNIEnv*, jobject, jclass,
                            jmethodID, va_list)
        jfloat      (*CallNonvirtualFloatMethodA)(JNIEnv*, jobject, jclass,
                            jmethodID, jvalue*)
        jdouble     (*CallNonvirtualDoubleMethod)(JNIEnv*, jobject, jclass,
                            jmethodID, ...)
        jdouble     (*CallNonvirtualDoubleMethodV)(JNIEnv*, jobject, jclass,
                            jmethodID, va_list)
        jdouble     (*CallNonvirtualDoubleMethodA)(JNIEnv*, jobject, jclass,
                            jmethodID, jvalue*)
        void        (*CallNonvirtualVoidMethod)(JNIEnv*, jobject, jclass,
                            jmethodID, ...)
        void        (*CallNonvirtualVoidMethodV)(JNIEnv*, jobject, jclass,
                            jmethodID, va_list)
        void        (*CallNonvirtualVoidMethodA)(JNIEnv*, jobject, jclass,
                            jmethodID, jvalue*)

        jfieldID    (*GetFieldID)(JNIEnv*, jclass, const_char*, const_char*)

        jobject     (*GetObjectField)(JNIEnv*, jobject, jfieldID)
        jboolean    (*GetBooleanField)(JNIEnv*, jobject, jfieldID)
        jbyte       (*GetByteField)(JNIEnv*, jobject, jfieldID)
        jchar       (*GetCharField)(JNIEnv*, jobject, jfieldID)
        jshort      (*GetShortField)(JNIEnv*, jobject, jfieldID)
        jint        (*GetIntField)(JNIEnv*, jobject, jfieldID)
        jlong       (*GetLongField)(JNIEnv*, jobject, jfieldID)
        jfloat      (*GetFloatField)(JNIEnv*, jobject, jfieldID)
        jdouble     (*GetDoubleField)(JNIEnv*, jobject, jfieldID)

        void        (*SetObjectField)(JNIEnv*, jobject, jfieldID, jobject)
        void        (*SetBooleanField)(JNIEnv*, jobject, jfieldID, jboolean)
        void        (*SetByteField)(JNIEnv*, jobject, jfieldID, jbyte)
        void        (*SetCharField)(JNIEnv*, jobject, jfieldID, jchar)
        void        (*SetShortField)(JNIEnv*, jobject, jfieldID, jshort)
        void        (*SetIntField)(JNIEnv*, jobject, jfieldID, jint)
        void        (*SetLongField)(JNIEnv*, jobject, jfieldID, jlong)
        void        (*SetFloatField)(JNIEnv*, jobject, jfieldID, jfloat)
        void        (*SetDoubleField)(JNIEnv*, jobject, jfieldID, jdouble)

        jmethodID   (*GetStaticMethodID)(JNIEnv*, jclass, const_char*, const_char*)

        jobject     (*CallStaticObjectMethod)(JNIEnv*, jclass, jmethodID, ...)
        jobject     (*CallStaticObjectMethodV)(JNIEnv*, jclass, jmethodID, va_list)
        jobject     (*CallStaticObjectMethodA)(JNIEnv*, jclass, jmethodID, jvalue*)
        jboolean    (*CallStaticBooleanMethod)(JNIEnv*, jclass, jmethodID, ...)
        jboolean    (*CallStaticBooleanMethodV)(JNIEnv*, jclass, jmethodID,
                            va_list)
        jboolean    (*CallStaticBooleanMethodA)(JNIEnv*, jclass, jmethodID,
                            jvalue*)
        jbyte       (*CallStaticByteMethod)(JNIEnv*, jclass, jmethodID, ...)
        jbyte       (*CallStaticByteMethodV)(JNIEnv*, jclass, jmethodID, va_list)
        jbyte       (*CallStaticByteMethodA)(JNIEnv*, jclass, jmethodID, jvalue*)
        jchar       (*CallStaticCharMethod)(JNIEnv*, jclass, jmethodID, ...)
        jchar       (*CallStaticCharMethodV)(JNIEnv*, jclass, jmethodID, va_list)
        jchar       (*CallStaticCharMethodA)(JNIEnv*, jclass, jmethodID, jvalue*)
        jshort      (*CallStaticShortMethod)(JNIEnv*, jclass, jmethodID, ...)
        jshort      (*CallStaticShortMethodV)(JNIEnv*, jclass, jmethodID, va_list)
        jshort      (*CallStaticShortMethodA)(JNIEnv*, jclass, jmethodID, jvalue*)
        jint        (*CallStaticIntMethod)(JNIEnv*, jclass, jmethodID, ...)
        jint        (*CallStaticIntMethodV)(JNIEnv*, jclass, jmethodID, va_list)
        jint        (*CallStaticIntMethodA)(JNIEnv*, jclass, jmethodID, jvalue*)
        jlong       (*CallStaticLongMethod)(JNIEnv*, jclass, jmethodID, ...)
        jlong       (*CallStaticLongMethodV)(JNIEnv*, jclass, jmethodID, va_list)
        jlong       (*CallStaticLongMethodA)(JNIEnv*, jclass, jmethodID, jvalue*)
        jfloat      (*CallStaticFloatMethod)(JNIEnv*, jclass, jmethodID, ...)
        jfloat      (*CallStaticFloatMethodV)(JNIEnv*, jclass, jmethodID, va_list)
        jfloat      (*CallStaticFloatMethodA)(JNIEnv*, jclass, jmethodID, jvalue*)
        jdouble     (*CallStaticDoubleMethod)(JNIEnv*, jclass, jmethodID, ...)
        jdouble     (*CallStaticDoubleMethodV)(JNIEnv*, jclass, jmethodID, va_list)
        jdouble     (*CallStaticDoubleMethodA)(JNIEnv*, jclass, jmethodID, jvalue*)
        void        (*CallStaticVoidMethod)(JNIEnv*, jclass, jmethodID, ...)
        void        (*CallStaticVoidMethodV)(JNIEnv*, jclass, jmethodID, va_list)
        void        (*CallStaticVoidMethodA)(JNIEnv*, jclass, jmethodID, jvalue*)

        jfieldID    (*GetStaticFieldID)(JNIEnv*, jclass, const_char*,
                            const_char*)

        jobject     (*GetStaticObjectField)(JNIEnv*, jclass, jfieldID)
        jboolean    (*GetStaticBooleanField)(JNIEnv*, jclass, jfieldID)
        jbyte       (*GetStaticByteField)(JNIEnv*, jclass, jfieldID)
        jchar       (*GetStaticCharField)(JNIEnv*, jclass, jfieldID)
        jshort      (*GetStaticShortField)(JNIEnv*, jclass, jfieldID)
        jint        (*GetStaticIntField)(JNIEnv*, jclass, jfieldID)
        jlong       (*GetStaticLongField)(JNIEnv*, jclass, jfieldID)
        jfloat      (*GetStaticFloatField)(JNIEnv*, jclass, jfieldID)
        jdouble     (*GetStaticDoubleField)(JNIEnv*, jclass, jfieldID)

        void        (*SetStaticObjectField)(JNIEnv*, jclass, jfieldID, jobject)
        void        (*SetStaticBooleanField)(JNIEnv*, jclass, jfieldID, jboolean)
        void        (*SetStaticByteField)(JNIEnv*, jclass, jfieldID, jbyte)
        void        (*SetStaticCharField)(JNIEnv*, jclass, jfieldID, jchar)
        void        (*SetStaticShortField)(JNIEnv*, jclass, jfieldID, jshort)
        void        (*SetStaticIntField)(JNIEnv*, jclass, jfieldID, jint)
        void        (*SetStaticLongField)(JNIEnv*, jclass, jfieldID, jlong)
        void        (*SetStaticFloatField)(JNIEnv*, jclass, jfieldID, jfloat)
        void        (*SetStaticDoubleField)(JNIEnv*, jclass, jfieldID, jdouble)

        jstring     (*NewString)(JNIEnv*, const_jchar*, jsize)
        jsize       (*GetStringLength)(JNIEnv*, jstring)
        const_jchar* (*GetStringChars)(JNIEnv*, jstring, jboolean*)
        void        (*ReleaseStringChars)(JNIEnv*, jstring, const_jchar*)
        jstring     (*NewStringUTF)(JNIEnv*, char*)
        jsize       (*GetStringUTFLength)(JNIEnv*, jstring)
        # JNI spec says this returns const_jbyte*, but that's inconsistent
        const_char* (*GetStringUTFChars)(JNIEnv*, jstring, jboolean*)
        void        (*ReleaseStringUTFChars)(JNIEnv*, jstring, const_char*)
        jsize       (*GetArrayLength)(JNIEnv*, jarray)
        jobjectArray (*NewObjectArray)(JNIEnv*, jsize, jclass, jobject)
        jobject     (*GetObjectArrayElement)(JNIEnv*, jobjectArray, jsize)
        void        (*SetObjectArrayElement)(JNIEnv*, jobjectArray, jsize, jobject)

        jbooleanArray (*NewBooleanArray)(JNIEnv*, jsize)
        jbyteArray    (*NewByteArray)(JNIEnv*, jsize)
        jcharArray    (*NewCharArray)(JNIEnv*, jsize)
        jshortArray   (*NewShortArray)(JNIEnv*, jsize)
        jintArray     (*NewIntArray)(JNIEnv*, jsize)
        jlongArray    (*NewLongArray)(JNIEnv*, jsize)
        jfloatArray   (*NewFloatArray)(JNIEnv*, jsize)
        jdoubleArray  (*NewDoubleArray)(JNIEnv*, jsize)

        jboolean*   (*GetBooleanArrayElements)(JNIEnv*, jbooleanArray, jboolean*)
        jbyte*      (*GetByteArrayElements)(JNIEnv*, jbyteArray, jboolean*)
        jchar*      (*GetCharArrayElements)(JNIEnv*, jcharArray, jboolean*)
        jshort*     (*GetShortArrayElements)(JNIEnv*, jshortArray, jboolean*)
        jint*       (*GetIntArrayElements)(JNIEnv*, jintArray, jboolean*)
        jlong*      (*GetLongArrayElements)(JNIEnv*, jlongArray, jboolean*)
        jfloat*     (*GetFloatArrayElements)(JNIEnv*, jfloatArray, jboolean*)
        jdouble*    (*GetDoubleArrayElements)(JNIEnv*, jdoubleArray, jboolean*)

        void        (*ReleaseBooleanArrayElements)(JNIEnv*, jbooleanArray,
                            jboolean*, jint)
        void        (*ReleaseByteArrayElements)(JNIEnv*, jbyteArray,
                            jbyte*, jint)
        void        (*ReleaseCharArrayElements)(JNIEnv*, jcharArray,
                            jchar*, jint)
        void        (*ReleaseShortArrayElements)(JNIEnv*, jshortArray,
                            jshort*, jint)
        void        (*ReleaseIntArrayElements)(JNIEnv*, jintArray,
                            jint*, jint)
        void        (*ReleaseLongArrayElements)(JNIEnv*, jlongArray,
                            jlong*, jint)
        void        (*ReleaseFloatArrayElements)(JNIEnv*, jfloatArray,
                            jfloat*, jint)
        void        (*ReleaseDoubleArrayElements)(JNIEnv*, jdoubleArray,
                            jdouble*, jint)

        void        (*GetBooleanArrayRegion)(JNIEnv*, jbooleanArray,
                            jsize, jsize, jboolean*)
        void        (*GetByteArrayRegion)(JNIEnv*, jbyteArray,
                            jsize, jsize, jbyte*)
        void        (*GetCharArrayRegion)(JNIEnv*, jcharArray,
                            jsize, jsize, jchar*)
        void        (*GetShortArrayRegion)(JNIEnv*, jshortArray,
                            jsize, jsize, jshort*)
        void        (*GetIntArrayRegion)(JNIEnv*, jintArray,
                            jsize, jsize, jint*)
        void        (*GetLongArrayRegion)(JNIEnv*, jlongArray,
                            jsize, jsize, jlong*)
        void        (*GetFloatArrayRegion)(JNIEnv*, jfloatArray,
                            jsize, jsize, jfloat*)
        void        (*GetDoubleArrayRegion)(JNIEnv*, jdoubleArray,
                            jsize, jsize, jdouble*)

        # spec shows these without const some jni.h do, some don't
        void        (*SetBooleanArrayRegion)(JNIEnv*, jbooleanArray,
                            jsize, jsize, const_jboolean*)
        void        (*SetByteArrayRegion)(JNIEnv*, jbyteArray,
                            jsize, jsize, const_jbyte*)
        void        (*SetCharArrayRegion)(JNIEnv*, jcharArray,
                            jsize, jsize, const_jchar*)
        void        (*SetShortArrayRegion)(JNIEnv*, jshortArray,
                            jsize, jsize, const_jshort*)
        void        (*SetIntArrayRegion)(JNIEnv*, jintArray,
                            jsize, jsize, const_jint*)
        void        (*SetLongArrayRegion)(JNIEnv*, jlongArray,
                            jsize, jsize, const_jlong*)
        void        (*SetFloatArrayRegion)(JNIEnv*, jfloatArray,
                            jsize, jsize, const_jfloat*)
        void        (*SetDoubleArrayRegion)(JNIEnv*, jdoubleArray,
                            jsize, jsize, const_jdouble*)

        #XXX not working with cython?
        #jint        (*RegisterNatives)(JNIEnv*, jclass, const_JNINativeMethod*, jint)
        jint        (*UnregisterNatives)(JNIEnv*, jclass)
        jint        (*MonitorEnter)(JNIEnv*, jobject)
        jint        (*MonitorExit)(JNIEnv*, jobject)
        jint        (*GetJavaVM)(JNIEnv*, JavaVM**)

        void        (*GetStringRegion)(JNIEnv*, jstring, jsize, jsize, jchar*)
        void        (*GetStringUTFRegion)(JNIEnv*, jstring, jsize, jsize, char*)

        void*       (*GetPrimitiveArrayCritical)(JNIEnv*, jarray, jboolean*)
        void        (*ReleasePrimitiveArrayCritical)(JNIEnv*, jarray, void*, jint)

        const_jchar* (*GetStringCritical)(JNIEnv*, jstring, jboolean*)
        void        (*ReleaseStringCritical)(JNIEnv*, jstring, const_jchar*)

        jweak       (*NewWeakGlobalRef)(JNIEnv*, jobject)
        void        (*DeleteWeakGlobalRef)(JNIEnv*, jweak)

        jboolean    (*ExceptionCheck)(JNIEnv*)

        jobject     (*NewDirectByteBuffer)(JNIEnv*, void*, jlong)
        void*       (*GetDirectBufferAddress)(JNIEnv*, jobject)
        jlong       (*GetDirectBufferCapacity)(JNIEnv*, jobject)

        jobjectRefType (*GetObjectRefType)(JNIEnv*, jobject)

    ctypedef struct JavaVM:
        pass