Jni开发基础入门（二）

摘要

上一篇，我们完成了Android Studio中对Ndk的支持，接下来我们就动手看一看NDK中编写需要注意的一些地方。

必要了解

在做NDK开发 前，首先我们需要知道NDK的一些参数和配置，这样我们在编写的时候就不会太过迷茫。这里我先讲jni.h的头文件贴出来，当然是全部的，希望在了解Jni前，先了解一下JNi中头信息给我的一些使用方法，大体分为两部分：一部分声明为C语言的实现，另一部分声明为C++语言的实现，区别最明显的是C++不用在参数中带

JNIEnv*

，同时如果您在编写JNi时候，虽然在引用完后你所创建的局部和全局变量都会被GC回收掉，但是为了不因为占用内存过多而导致JNI中产生OOM,我们依然需要在不使用LocalRef或GoldRef时，将其及时的Delete掉，下面的参数中有详细的声明，可以细细研读一下。对 编程绝对是有好处的。

#ifndef JNI_H_
#define JNI_H_

#include <sys/cdefs.h>
#include <stdarg.h>

/*
* Primitive types that match up with Java equivalents.
*/
#ifdef HAVE_INTTYPES_H
# include <inttypes.h>      /* C99 */
typedef uint8_t         jboolean;       /* unsigned 8 bits */
typedef int8_t          jbyte;          /* signed 8 bits */
typedef uint16_t        jchar;          /* unsigned 16 bits */
typedef int16_t         jshort;         /* signed 16 bits */
typedef int32_t         jint;           /* signed 32 bits */
typedef int64_t         jlong;          /* signed 64 bits */
typedef float           jfloat;         /* 32-bit IEEE 754 */
typedef double          jdouble;        /* 64-bit IEEE 754 */
#else
typedef unsigned char   jboolean;       /* unsigned 8 bits */
typedef signed char     jbyte;          /* signed 8 bits */
typedef unsigned short  jchar;          /* unsigned 16 bits */
typedef short           jshort;         /* signed 16 bits */
typedef int             jint;           /* signed 32 bits */
typedef long long       jlong;          /* signed 64 bits */
typedef float           jfloat;         /* 32-bit IEEE 754 */
typedef double          jdouble;        /* 64-bit IEEE 754 */
#endif

/* "cardinal indices and sizes" */
typedef jint            jsize;

#ifdef __cplusplus
/*
* Reference types, in C++
*/
class _jobject {};
class _jclass : public _jobject {};
class _jstring : public _jobject {};
class _jarray : public _jobject {};
class _jobjectArray : public _jarray {};
class _jbooleanArray : public _jarray {};
class _jbyteArray : public _jarray {};
class _jcharArray : public _jarray {};
class _jshortArray : public _jarray {};
class _jintArray : public _jarray {};
class _jlongArray : public _jarray {};
class _jfloatArray : public _jarray {};
class _jdoubleArray : public _jarray {};
class _jthrowable : public _jobject {};

typedef _jobject*       jobject;
typedef _jclass*        jclass;
typedef _jstring*       jstring;
typedef _jarray*        jarray;
typedef _jobjectArray*  jobjectArray;
typedef _jbooleanArray* jbooleanArray;
typedef _jbyteArray*    jbyteArray;
typedef _jcharArray*    jcharArray;
typedef _jshortArray*   jshortArray;
typedef _jintArray*     jintArray;
typedef _jlongArray*    jlongArray;
typedef _jfloatArray*   jfloatArray;
typedef _jdoubleArray*  jdoubleArray;
typedef _jthrowable*    jthrowable;
typedef _jobject*       jweak;

#else /* not __cplusplus */

/*
* Reference types, in C.
*/
typedef void*           jobject;
typedef jobject         jclass;
typedef jobject         jstring;
typedef jobject         jarray;
typedef jarray          jobjectArray;
typedef jarray          jbooleanArray;
typedef jarray          jbyteArray;
typedef jarray          jcharArray;
typedef jarray          jshortArray;
typedef jarray          jintArray;
typedef jarray          jlongArray;
typedef jarray          jfloatArray;
typedef jarray          jdoubleArray;
typedef jobject         jthrowable;
typedef jobject         jweak;

#endif /* not __cplusplus */

struct _jfieldID;                       /* opaque structure */
typedef struct _jfieldID* jfieldID;     /* field IDs */

struct _jmethodID;                      /* opaque structure */
typedef struct _jmethodID* jmethodID;   /* method IDs */

struct JNIInvokeInterface;

typedef union jvalue {
jboolean    z;
jbyte       b;
jchar       c;
jshort      s;
jint        i;
jlong       j;
jfloat      f;
jdouble     d;
jobject     l;
} jvalue;

typedef enum jobjectRefType {
JNIInvalidRefType = 0,
JNILocalRefType = 1,
JNIGlobalRefType = 2,
JNIWeakGlobalRefType = 3
} jobjectRefType;

typedef struct {
const char* name;
const char* signature;
void*       fnPtr;
} JNINativeMethod;

struct _JNIEnv;
struct _JavaVM;
typedef const struct JNINativeInterface* C_JNIEnv;

#if defined(__cplusplus)
typedef _JNIEnv JNIEnv;
typedef _JavaVM JavaVM;
#else
typedef const struct JNINativeInterface* JNIEnv;
typedef const struct JNIInvokeInterface* JavaVM;
#endif

/*
* Table of interface function pointers.
*/
struct JNINativeInterface {
void*       reserved0;
void*       reserved1;
void*       reserved2;
void*       reserved3;

jint        (*GetVersion)(JNIEnv *);

jclass      (*DefineClass)(JNIEnv*, const char*, jobject, const jbyte*,
jsize);
jclass      (*FindClass)(JNIEnv*, const 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*, const 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*);

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);

/* added in JNI 1.6 */
jobjectRefType (*GetObjectRefType)(JNIEnv*, jobject);
};

/*
* C++ object wrapper.
*
* This is usually overlaid on a C struct whose first element is a
* JNINativeInterface*.  We rely somewhat on compiler behavior.
*/
struct _JNIEnv {
/* do not rename this; it does not seem to be entirely opaque */
const struct JNINativeInterface* functions;

#if defined(__cplusplus)

jint GetVersion()
{ return functions->GetVersion(this); }

jclass DefineClass(const char *name, jobject loader, const jbyte* buf,
jsize bufLen)
{ return functions->DefineClass(this, name, loader, buf, bufLen); }

jclass FindClass(const char* name)
{ return functions->FindClass(this, name); }

jmethodID FromReflectedMethod(jobject method)
{ return functions->FromReflectedMethod(this, method); }

jfieldID FromReflectedField(jobject field)
{ return functions->FromReflectedField(this, field); }

jobject ToReflectedMethod(jclass cls, jmethodID methodID, jboolean isStatic)
{ return functions->ToReflectedMethod(this, cls, methodID, isStatic); }

jclass GetSuperclass(jclass clazz)
{ return functions->GetSuperclass(this, clazz); }

jboolean IsAssignableFrom(jclass clazz1, jclass clazz2)
{ return functions->IsAssignableFrom(this, clazz1, clazz2); }

jobject ToReflectedField(jclass cls, jfieldID fieldID, jboolean isStatic)
{ return functions->ToReflectedField(this, cls, fieldID, isStatic); }

jint Throw(jthrowable obj)
{ return functions->Throw(this, obj); }

jint ThrowNew(jclass clazz, const char* message)
{ return functions->ThrowNew(this, clazz, message); }

jthrowable ExceptionOccurred()
{ return functions->ExceptionOccurred(this); }

void ExceptionDescribe()
{ functions->ExceptionDescribe(this); }

void ExceptionClear()
{ functions->ExceptionClear(this); }

void FatalError(const char* msg)
{ functions->FatalError(this, msg); }

jint PushLocalFrame(jint capacity)
{ return functions->PushLocalFrame(this, capacity); }

jobject PopLocalFrame(jobject result)
{ return functions->PopLocalFrame(this, result); }

jobject NewGlobalRef(jobject obj)
{ return functions->NewGlobalRef(this, obj); }

void DeleteGlobalRef(jobject globalRef)
{ functions->DeleteGlobalRef(this, globalRef); }

void DeleteLocalRef(jobject localRef)
{ functions->DeleteLocalRef(this, localRef); }

jboolean IsSameObject(jobject ref1, jobject ref2)
{ return functions->IsSameObject(this, ref1, ref2); }

jobject NewLocalRef(jobject ref)
{ return functions->NewLocalRef(this, ref); }

jint EnsureLocalCapacity(jint capacity)
{ return functions->EnsureLocalCapacity(this, capacity); }

jobject AllocObject(jclass clazz)
{ return functions->AllocObject(this, clazz); }

jobject NewObject(jclass clazz, jmethodID methodID, ...)
{
va_list args;
va_start(args, methodID);
jobject result = functions->NewObjectV(this, clazz, methodID, args);
va_end(args);
return result;
}

jobject NewObjectV(jclass clazz, jmethodID methodID, va_list args)
{ return functions->NewObjectV(this, clazz, methodID, args); }

jobject NewObjectA(jclass clazz, jmethodID methodID, jvalue* args)
{ return functions->NewObjectA(this, clazz, methodID, args); }

jclass GetObjectClass(jobject obj)
{ return functions->GetObjectClass(this, obj); }

jboolean IsInstanceOf(jobject obj, jclass clazz)
{ return functions->IsInstanceOf(this, obj, clazz); }

jmethodID GetMethodID(jclass clazz, const char* name, const char* sig)
{ return functions->GetMethodID(this, clazz, name, sig); }

#define CALL_TYPE_METHOD(_jtype, _jname)                                    \
\
_jtype Call##_jname##Method(jobject obj, jmethodID methodID, ...)       \
{                                                                       \
_jtype result;                                                      \
va_list args;                                                       \
va_start(args, methodID);                                           \
result = functions->Call##_jname##MethodV(this, obj, methodID,      \
args);                                                  \
va_end(args);                                                       \
return result;                                                      \
}
#define CALL_TYPE_METHODV(_jtype, _jname)                                   \
\
_jtype Call##_jname##MethodV(jobject obj, jmethodID methodID,           \
va_list args)                                                       \
{ return functions->Call##_jname##MethodV(this, obj, methodID, args); }
#define CALL_TYPE_METHODA(_jtype, _jname)                                   \
\
_jtype Call##_jname##MethodA(jobject obj, jmethodID methodID,           \
jvalue* args)                                                       \
{ return functions->Call##_jname##MethodA(this, obj, methodID, args); }

#define CALL_TYPE(_jtype, _jname)                                           \
CALL_TYPE_METHOD(_jtype, _jname)                                        \
CALL_TYPE_METHODV(_jtype, _jname)                                       \
CALL_TYPE_METHODA(_jtype, _jname)

CALL_TYPE(jobject, Object)
CALL_TYPE(jboolean, Boolean)
CALL_TYPE(jbyte, Byte)
CALL_TYPE(jchar, Char)
CALL_TYPE(jshort, Short)
CALL_TYPE(jint, Int)
CALL_TYPE(jlong, Long)
CALL_TYPE(jfloat, Float)
CALL_TYPE(jdouble, Double)

void CallVoidMethod(jobject obj, jmethodID methodID, ...)
{
va_list args;
va_start(args, methodID);
functions->CallVoidMethodV(this, obj, methodID, args);
va_end(args);
}
void CallVoidMethodV(jobject obj, jmethodID methodID, va_list args)
{ functions->CallVoidMethodV(this, obj, methodID, args); }
void CallVoidMethodA(jobject obj, jmethodID methodID, jvalue* args)
{ functions->CallVoidMethodA(this, obj, methodID, args); }

#define CALL_NONVIRT_TYPE_METHOD(_jtype, _jname)                            \
\
_jtype CallNonvirtual##_jname##Method(jobject obj, jclass clazz,        \
jmethodID methodID, ...)                                            \
{                                                                       \
_jtype result;                                                      \
va_list args;                                                       \
va_start(args, methodID);                                           \
result = functions->CallNonvirtual##_jname##MethodV(this, obj,      \
clazz, methodID, args);                                 \
va_end(args);                                                       \
return result;                                                      \
}
#define CALL_NONVIRT_TYPE_METHODV(_jtype, _jname)                           \
\
_jtype CallNonvirtual##_jname##MethodV(jobject obj, jclass clazz,       \
jmethodID methodID, va_list args)                                   \
{ return functions->CallNonvirtual##_jname##MethodV(this, obj, clazz,   \
methodID, args); }
#define CALL_NONVIRT_TYPE_METHODA(_jtype, _jname)                           \
\
_jtype CallNonvirtual##_jname##MethodA(jobject obj, jclass clazz,       \
jmethodID methodID, jvalue* args)                                   \
{ return functions->CallNonvirtual##_jname##MethodA(this, obj, clazz,   \
methodID, args); }

#define CALL_NONVIRT_TYPE(_jtype, _jname)                                   \
CALL_NONVIRT_TYPE_METHOD(_jtype, _jname)                                \
CALL_NONVIRT_TYPE_METHODV(_jtype, _jname)                               \
CALL_NONVIRT_TYPE_METHODA(_jtype, _jname)

CALL_NONVIRT_TYPE(jobject, Object)
CALL_NONVIRT_TYPE(jboolean, Boolean)
CALL_NONVIRT_TYPE(jbyte, Byte)
CALL_NONVIRT_TYPE(jchar, Char)
CALL_NONVIRT_TYPE(jshort, Short)
CALL_NONVIRT_TYPE(jint, Int)
CALL_NONVIRT_TYPE(jlong, Long)
CALL_NONVIRT_TYPE(jfloat, Float)
CALL_NONVIRT_TYPE(jdouble, Double)

void CallNonvirtualVoidMethod(jobject obj, jclass clazz,
jmethodID methodID, ...)
{
va_list args;
va_start(args, methodID);
functions->CallNonvirtualVoidMethodV(this, obj, clazz, methodID, args);
va_end(args);
}
void CallNonvirtualVoidMethodV(jobject obj, jclass clazz,
jmethodID methodID, va_list args)
{ functions->CallNonvirtualVoidMethodV(this, obj, clazz, methodID, args); }
void CallNonvirtualVoidMethodA(jobject obj, jclass clazz,
jmethodID methodID, jvalue* args)
{ functions->CallNonvirtualVoidMethodA(this, obj, clazz, methodID, args); }

jfieldID GetFieldID(jclass clazz, const char* name, const char* sig)
{ return functions->GetFieldID(this, clazz, name, sig); }

jobject GetObjectField(jobject obj, jfieldID fieldID)
{ return functions->GetObjectField(this, obj, fieldID); }
jboolean GetBooleanField(jobject obj, jfieldID fieldID)
{ return functions->GetBooleanField(this, obj, fieldID); }
jbyte GetByteField(jobject obj, jfieldID fieldID)
{ return functions->GetByteField(this, obj, fieldID); }
jchar GetCharField(jobject obj, jfieldID fieldID)
{ return functions->GetCharField(this, obj, fieldID); }
jshort GetShortField(jobject obj, jfieldID fieldID)
{ return functions->GetShortField(this, obj, fieldID); }
jint GetIntField(jobject obj, jfieldID fieldID)
{ return functions->GetIntField(this, obj, fieldID); }
jlong GetLongField(jobject obj, jfieldID fieldID)
{ return functions->GetLongField(this, obj, fieldID); }

jfloat GetFloatField(jobject obj, jfieldID fieldID)
{ return functions->GetFloatField(this, obj, fieldID); }

jdouble GetDoubleField(jobject obj, jfieldID fieldID)
{ return functions->GetDoubleField(this, obj, fieldID); }

void SetObjectField(jobject obj, jfieldID fieldID, jobject value)
{ functions->SetObjectField(this, obj, fieldID, value); }
void SetBooleanField(jobject obj, jfieldID fieldID, jboolean value)
{ functions->SetBooleanField(this, obj, fieldID, value); }
void SetByteField(jobject obj, jfieldID fieldID, jbyte value)
{ functions->SetByteField(this, obj, fieldID, value); }
void SetCharField(jobject obj, jfieldID fieldID, jchar value)
{ functions->SetCharField(this, obj, fieldID, value); }
void SetShortField(jobject obj, jfieldID fieldID, jshort value)
{ functions->SetShortField(this, obj, fieldID, value); }
void SetIntField(jobject obj, jfieldID fieldID, jint value)
{ functions->SetIntField(this, obj, fieldID, value); }
void SetLongField(jobject obj, jfieldID fieldID, jlong value)
{ functions->SetLongField(this, obj, fieldID, value); }

void SetFloatField(jobject obj, jfieldID fieldID, jfloat value)
{ functions->SetFloatField(this, obj, fieldID, value); }

void SetDoubleField(jobject obj, jfieldID fieldID, jdouble value)
{ functions->SetDoubleField(this, obj, fieldID, value); }

jmethodID GetStaticMethodID(jclass clazz, const char* name, const char* sig)
{ return functions->GetStaticMethodID(this, clazz, name, sig); }

#define CALL_STATIC_TYPE_METHOD(_jtype, _jname)                             \
\
_jtype CallStatic##_jname##Method(jclass clazz, jmethodID methodID,     \
...)                                                                \
{                                                                       \
_jtype result;                                                      \
va_list args;                                                       \
va_start(args, methodID);                                           \
result = functions->CallStatic##_jname##MethodV(this, clazz,        \
methodID, args);                                        \
va_end(args);                                                       \
return result;                                                      \
}
#define CALL_STATIC_TYPE_METHODV(_jtype, _jname)                            \
\
_jtype CallStatic##_jname##MethodV(jclass clazz, jmethodID methodID,    \
va_list args)                                                       \
{ return functions->CallStatic##_jname##MethodV(this, clazz, methodID,  \
args); }
#define CALL_STATIC_TYPE_METHODA(_jtype, _jname)                            \
\
_jtype CallStatic##_jname##MethodA(jclass clazz, jmethodID methodID,    \
jvalue* args)                                                       \
{ return functions->CallStatic##_jname##MethodA(this, clazz, methodID,  \
args); }

#define CALL_STATIC_TYPE(_jtype, _jname)                                    \
CALL_STATIC_TYPE_METHOD(_jtype, _jname)                                 \
CALL_STATIC_TYPE_METHODV(_jtype, _jname)                                \
CALL_STATIC_TYPE_METHODA(_jtype, _jname)

CALL_STATIC_TYPE(jobject, Object)
CALL_STATIC_TYPE(jboolean, Boolean)
CALL_STATIC_TYPE(jbyte, Byte)
CALL_STATIC_TYPE(jchar, Char)
CALL_STATIC_TYPE(jshort, Short)
CALL_STATIC_TYPE(jint, Int)
CALL_STATIC_TYPE(jlong, Long)
CALL_STATIC_TYPE(jfloat, Float)
CALL_STATIC_TYPE(jdouble, Double)

void CallStaticVoidMethod(jclass clazz, jmethodID methodID, ...)
{
va_list args;
va_start(args, methodID);
functions->CallStaticVoidMethodV(this, clazz, methodID, args);
va_end(args);
}
void CallStaticVoidMethodV(jclass clazz, jmethodID methodID, va_list args)
{ functions->CallStaticVoidMethodV(this, clazz, methodID, args); }
void CallStaticVoidMethodA(jclass clazz, jmethodID methodID, jvalue* args)
{ functions->CallStaticVoidMethodA(this, clazz, methodID, args); }

jfieldID GetStaticFieldID(jclass clazz, const char* name, const char* sig)
{ return functions->GetStaticFieldID(this, clazz, name, sig); }

jobject GetStaticObjectField(jclass clazz, jfieldID fieldID)
{ return functions->GetStaticObjectField(this, clazz, fieldID); }
jboolean GetStaticBooleanField(jclass clazz, jfieldID fieldID)
{ return functions->GetStaticBooleanField(this, clazz, fieldID); }
jbyte GetStaticByteField(jclass clazz, jfieldID fieldID)
{ return functions->GetStaticByteField(this, clazz, fieldID); }
jchar GetStaticCharField(jclass clazz, jfieldID fieldID)
{ return functions->GetStaticCharField(this, clazz, fieldID); }
jshort GetStaticShortField(jclass clazz, jfieldID fieldID)
{ return functions->GetStaticShortField(this, clazz, fieldID); }
jint GetStaticIntField(jclass clazz, jfieldID fieldID)
{ return functions->GetStaticIntField(this, clazz, fieldID); }
jlong GetStaticLongField(jclass clazz, jfieldID fieldID)
{ return functions->GetStaticLongField(this, clazz, fieldID); }

jfloat GetStaticFloatField(jclass clazz, jfieldID fieldID)
{ return functions->GetStaticFloatField(this, clazz, fieldID); }

jdouble GetStaticDoubleField(jclass clazz, jfieldID fieldID)
{ return functions->GetStaticDoubleField(this, clazz, fieldID); }

void SetStaticObjectField(jclass clazz, jfieldID fieldID, jobject value)
{ functions->SetStaticObjectField(this, clazz, fieldID, value); }
void SetStaticBooleanField(jclass clazz, jfieldID fieldID, jboolean value)
{ functions->SetStaticBooleanField(this, clazz, fieldID, value); }
void SetStaticByteField(jclass clazz, jfieldID fieldID, jbyte value)
{ functions->SetStaticByteField(this, clazz, fieldID, value); }
void SetStaticCharField(jclass clazz, jfieldID fieldID, jchar value)
{ functions->SetStaticCharField(this, clazz, fieldID, value); }
void SetStaticShortField(jclass clazz, jfieldID fieldID, jshort value)
{ functions->SetStaticShortField(this, clazz, fieldID, value); }
void SetStaticIntField(jclass clazz, jfieldID fieldID, jint value)
{ functions->SetStaticIntField(this, clazz, fieldID, value); }
void SetStaticLongField(jclass clazz, jfieldID fieldID, jlong value)
{ functions->SetStaticLongField(this, clazz, fieldID, value); }

void SetStaticFloatField(jclass clazz, jfieldID fieldID, jfloat value)
{ functions->SetStaticFloatField(this, clazz, fieldID, value); }

void SetStaticDoubleField(jclass clazz, jfieldID fieldID, jdouble value)
{ functions->SetStaticDoubleField(this, clazz, fieldID, value); }

jstring NewString(const jchar* unicodeChars, jsize len)
{ return functions->NewString(this, unicodeChars, len); }

jsize GetStringLength(jstring string)
{ return functions->GetStringLength(this, string); }

const jchar* GetStringChars(jstring string, jboolean* isCopy)
{ return functions->GetStringChars(this, string, isCopy); }

void ReleaseStringChars(jstring string, const jchar* chars)
{ functions->ReleaseStringChars(this, string, chars); }

jstring NewStringUTF(const char* bytes)
{ return functions->NewStringUTF(this, bytes); }

jsize GetStringUTFLength(jstring string)
{ return functions->GetStringUTFLength(this, string); }

const char* GetStringUTFChars(jstring string, jboolean* isCopy)
{ return functions->GetStringUTFChars(this, string, isCopy); }

void ReleaseStringUTFChars(jstring string, const char* utf)
{ functions->ReleaseStringUTFChars(this, string, utf); }

jsize GetArrayLength(jarray array)
{ return functions->GetArrayLength(this, array); }

jobjectArray NewObjectArray(jsize length, jclass elementClass,
jobject initialElement)
{ return functions->NewObjectArray(this, length, elementClass,
initialElement); }

jobject GetObjectArrayElement(jobjectArray array, jsize index)
{ return functions->GetObjectArrayElement(this, array, index); }

void SetObjectArrayElement(jobjectArray array, jsize index, jobject value)
{ functions->SetObjectArrayElement(this, array, index, value); }

jbooleanArray NewBooleanArray(jsize length)
{ return functions->NewBooleanArray(this, length); }
jbyteArray NewByteArray(jsize length)
{ return functions->NewByteArray(this, length); }
jcharArray NewCharArray(jsize length)
{ return functions->NewCharArray(this, length); }
jshortArray NewShortArray(jsize length)
{ return functions->NewShortArray(this, length); }
jintArray NewIntArray(jsize length)
{ return functions->NewIntArray(this, length); }
jlongArray NewLongArray(jsize length)
{ return functions->NewLongArray(this, length); }
jfloatArray NewFloatArray(jsize length)
{ return functions->NewFloatArray(this, length); }
jdoubleArray NewDoubleArray(jsize length)
{ return functions->NewDoubleArray(this, length); }

jboolean* GetBooleanArrayElements(jbooleanArray array, jboolean* isCopy)
{ return functions->GetBooleanArrayElements(this, array, isCopy); }
jbyte* GetByteArrayElements(jbyteArray array, jboolean* isCopy)
{ return functions->GetByteArrayElements(this, array, isCopy); }
jchar* GetCharArrayElements(jcharArray array, jboolean* isCopy)
{ return functions->GetCharArrayElements(this, array, isCopy); }
jshort* GetShortArrayElements(jshortArray array, jboolean* isCopy)
{ return functions->GetShortArrayElements(this, array, isCopy); }
jint* GetIntArrayElements(jintArray array, jboolean* isCopy)
{ return functions->GetIntArrayElements(this, array, isCopy); }
jlong* GetLongArrayElements(jlongArray array, jboolean* isCopy)
{ return functions->GetLongArrayElements(this, array, isCopy); }
jfloat* GetFloatArrayElements(jfloatArray array, jboolean* isCopy)
{ return functions->GetFloatArrayElements(this, array, isCopy); }
jdouble* GetDoubleArrayElements(jdoubleArray array, jboolean* isCopy)
{ return functions->GetDoubleArrayElements(this, array, isCopy); }

void ReleaseBooleanArrayElements(jbooleanArray array, jboolean* elems,
jint mode)
{ functions->ReleaseBooleanArrayElements(this, array, elems, mode); }
void ReleaseByteArrayElements(jbyteArray array, jbyte* elems,
jint mode)
{ functions->ReleaseByteArrayElements(this, array, elems, mode); }
void ReleaseCharArrayElements(jcharArray array, jchar* elems,
jint mode)
{ functions->ReleaseCharArrayElements(this, array, elems, mode); }
void ReleaseShortArrayElements(jshortArray array, jshort* elems,
jint mode)
{ functions->ReleaseShortArrayElements(this, array, elems, mode); }
void ReleaseIntArrayElements(jintArray array, jint* elems,
jint mode)
{ functions->ReleaseIntArrayElements(this, array, elems, mode); }
void ReleaseLongArrayElements(jlongArray array, jlong* elems,
jint mode)
{ functions->ReleaseLongArrayElements(this, array, elems, mode); }
void ReleaseFloatArrayElements(jfloatArray array, jfloat* elems,
jint mode)
{ functions->ReleaseFloatArrayElements(this, array, elems, mode); }
void ReleaseDoubleArrayElements(jdoubleArray array, jdouble* elems,
jint mode)
{ functions->ReleaseDoubleArrayElements(this, array, elems, mode); }

void GetBooleanArrayRegion(jbooleanArray array, jsize start, jsize len,
jboolean* buf)
{ functions->GetBooleanArrayRegion(this, array, start, len, buf); }
void GetByteArrayRegion(jbyteArray array, jsize start, jsize len,
jbyte* buf)
{ functions->GetByteArrayRegion(this, array, start, len, buf); }
void GetCharArrayRegion(jcharArray array, jsize start, jsize len,
jchar* buf)
{ functions->GetCharArrayRegion(this, array, start, len, buf); }
void GetShortArrayRegion(jshortArray array, jsize start, jsize len,
jshort* buf)
{ functions->GetShortArrayRegion(this, array, start, len, buf); }
void GetIntArrayRegion(jintArray array, jsize start, jsize len,
jint* buf)
{ functions->GetIntArrayRegion(this, array, start, len, buf); }
void GetLongArrayRegion(jlongArray array, jsize start, jsize len,
jlong* buf)
{ functions->GetLongArrayRegion(this, array, start, len, buf); }
void GetFloatArrayRegion(jfloatArray array, jsize start, jsize len,
jfloat* buf)
{ functions->GetFloatArrayRegion(this, array, start, len, buf); }
void GetDoubleArrayRegion(jdoubleArray array, jsize start, jsize len,
jdouble* buf)
{ functions->GetDoubleArrayRegion(this, array, start, len, buf); }

void SetBooleanArrayRegion(jbooleanArray array, jsize start, jsize len,
const jboolean* buf)
{ functions->SetBooleanArrayRegion(this, array, start, len, buf); }
void SetByteArrayRegion(jbyteArray array, jsize start, jsize len,
const jbyte* buf)
{ functions->SetByteArrayRegion(this, array, start, len, buf); }
void SetCharArrayRegion(jcharArray array, jsize start, jsize len,
const jchar* buf)
{ functions->SetCharArrayRegion(this, array, start, len, buf); }
void SetShortArrayRegion(jshortArray array, jsize start, jsize len,
const jshort* buf)
{ functions->SetShortArrayRegion(this, array, start, len, buf); }
void SetIntArrayRegion(jintArray array, jsize start, jsize len,
const jint* buf)
{ functions->SetIntArrayRegion(this, array, start, len, buf); }
void SetLongArrayRegion(jlongArray array, jsize start, jsize len,
const jlong* buf)
{ functions->SetLongArrayRegion(this, array, start, len, buf); }
void SetFloatArrayRegion(jfloatArray array, jsize start, jsize len,
const jfloat* buf)
{ functions->SetFloatArrayRegion(this, array, start, len, buf); }
void SetDoubleArrayRegion(jdoubleArray array, jsize start, jsize len,
const jdouble* buf)
{ functions->SetDoubleArrayRegion(this, array, start, len, buf); }

jint RegisterNatives(jclass clazz, const JNINativeMethod* methods,
jint nMethods)
{ return functions->RegisterNatives(this, clazz, methods, nMethods); }

jint UnregisterNatives(jclass clazz)
{ return functions->UnregisterNatives(this, clazz); }

jint MonitorEnter(jobject obj)
{ return functions->MonitorEnter(this, obj); }

jint MonitorExit(jobject obj)
{ return functions->MonitorExit(this, obj); }

jint GetJavaVM(JavaVM** vm)
{ return functions->GetJavaVM(this, vm); }

void GetStringRegion(jstring str, jsize start, jsize len, jchar* buf)
{ functions->GetStringRegion(this, str, start, len, buf); }

void GetStringUTFRegion(jstring str, jsize start, jsize len, char* buf)
{ return functions->GetStringUTFRegion(this, str, start, len, buf); }

void* GetPrimitiveArrayCritical(jarray array, jboolean* isCopy)
{ return functions->GetPrimitiveArrayCritical(this, array, isCopy); }

void ReleasePrimitiveArrayCritical(jarray array, void* carray, jint mode)
{ functions->ReleasePrimitiveArrayCritical(this, array, carray, mode); }

const jchar* GetStringCritical(jstring string, jboolean* isCopy)
{ return functions->GetStringCritical(this, string, isCopy); }

void ReleaseStringCritical(jstring string, const jchar* carray)
{ functions->ReleaseStringCritical(this, string, carray); }

jweak NewWeakGlobalRef(jobject obj)
{ return functions->NewWeakGlobalRef(this, obj); }

void DeleteWeakGlobalRef(jweak obj)
{ functions->DeleteWeakGlobalRef(this, obj); }

jboolean ExceptionCheck()
{ return functions->ExceptionCheck(this); }

jobject NewDirectByteBuffer(void* address, jlong capacity)
{ return functions->NewDirectByteBuffer(this, address, capacity); }

void* GetDirectBufferAddress(jobject buf)
{ return functions->GetDirectBufferAddress(this, buf); }

jlong GetDirectBufferCapacity(jobject buf)
{ return functions->GetDirectBufferCapacity(this, buf); }

/* added in JNI 1.6 */
jobjectRefType GetObjectRefType(jobject obj)
{ return functions->GetObjectRefType(this, obj); }
#endif /*__cplusplus*/
};

/*
* JNI invocation interface.
*/
struct JNIInvokeInterface {
void*       reserved0;
void*       reserved1;
void*       reserved2;

jint        (*DestroyJavaVM)(JavaVM*);
jint        (*AttachCurrentThread)(JavaVM*, JNIEnv**, void*);
jint        (*DetachCurrentThread)(JavaVM*);
jint        (*GetEnv)(JavaVM*, void**, jint);
jint        (*AttachCurrentThreadAsDaemon)(JavaVM*, JNIEnv**, void*);
};

/*
* C++ version.
*/
struct _JavaVM {
const struct JNIInvokeInterface* functions;

#if defined(__cplusplus)
jint DestroyJavaVM()
{ return functions->DestroyJavaVM(this); }
jint AttachCurrentThread(JNIEnv** p_env, void* thr_args)
{ return functions->AttachCurrentThread(this, p_env, thr_args); }
jint DetachCurrentThread()
{ return functions->DetachCurrentThread(this); }
jint GetEnv(void** env, jint version)
{ return functions->GetEnv(this, env, version); }
jint AttachCurrentThreadAsDaemon(JNIEnv** p_env, void* thr_args)
{ return functions->AttachCurrentThreadAsDaemon(this, p_env, thr_args); }
#endif /*__cplusplus*/
};

struct JavaVMAttachArgs {
jint        version;    /* must be >= JNI_VERSION_1_2 */
const char* name;       /* NULL or name of thread as modified UTF-8 str */
jobject     group;      /* global ref of a ThreadGroup object, or NULL */
};
typedef struct JavaVMAttachArgs JavaVMAttachArgs;

/*
* JNI 1.2+ initialization.  (As of 1.6, the pre-1.2 structures are no
* longer supported.)
*/
typedef struct JavaVMOption {
const char* optionString;
void*       extraInfo;
} JavaVMOption;

typedef struct JavaVMInitArgs {
jint        version;    /* use JNI_VERSION_1_2 or later */

jint        nOptions;
JavaVMOption* options;
jboolean    ignoreUnrecognized;
} JavaVMInitArgs;

#ifdef __cplusplus
extern "C" {
#endif
/*
* VM initialization functions.
*
* Note these are the only symbols exported for JNI by the VM.
*/
#if 0  /* In practice, these are not exported by the NDK so don't declare them */
jint JNI_GetDefaultJavaVMInitArgs(void*);
jint JNI_CreateJavaVM(JavaVM**, JNIEnv**, void*);
jint JNI_GetCreatedJavaVMs(JavaVM**, jsize, jsize*);
#endif

#define JNIIMPORT
#define JNIEXPORT  __attribute__ ((visibility ("default")))
#define JNICALL

/*
* Prototypes for functions exported by loadable shared libs.  These are
* called by JNI, not provided by JNI.
*/
JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* vm, void* reserved);
JNIEXPORT void JNICALL JNI_OnUnload(JavaVM* vm, void* reserved);

#ifdef __cplusplus
}
#endif

/*
* Manifest constants.
*/
#define JNI_FALSE   0
#define JNI_TRUE    1

#define JNI_VERSION_1_1 0x00010001
#define JNI_VERSION_1_2 0x00010002
#define JNI_VERSION_1_4 0x00010004
#define JNI_VERSION_1_6 0x00010006

#define JNI_OK          (0)         /* no error */
#define JNI_ERR         (-1)        /* generic error */
#define JNI_EDETACHED   (-2)        /* thread detached from the VM */
#define JNI_EVERSION    (-3)        /* JNI version error */

#define JNI_COMMIT      1           /* copy content, do not free buffer */
#define JNI_ABORT       2           /* free buffer w/o copying back */

#endif  /* JNI_H_ */