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 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 JNINativeMethod const_JNINativeMethod "const JNINativeMethod"

    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 struct JNIInvokeInterface

    ctypedef JNINativeInterface* JNIEnv
    ctypedef JNIInvokeInterface* JavaVM

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

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

        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*) nogil

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

        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 JNIInvokeInterface:
        jint        (*AttachCurrentThread)(JavaVM *, JNIEnv **, void *)
        jint        (*DetachCurrentThread)(JavaVM *)