100 lines
3.8 KiB
C
100 lines
3.8 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2010 The Android Open Source Project
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef JNI_CONSTANTS_H_included
|
||
|
|
#define JNI_CONSTANTS_H_included
|
||
|
|
|
||
|
|
#include "JNIHelp.h"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A cache to avoid calling FindClass at runtime.
|
||
|
|
*
|
||
|
|
* Class lookup is relatively expensive (2.5us on passion-eng at the time of writing), so we do
|
||
|
|
* all such lookups eagerly at startup. This means that code that never uses, say,
|
||
|
|
* java.util.zip.Deflater still has to pay for the lookup, but it means that on a device the cost
|
||
|
|
* is definitely paid during boot and amortized. A central cache also removes the temptation to
|
||
|
|
* dynamically call FindClass rather than add a small cache to each file that needs one. Another
|
||
|
|
* cost is that each class cached here requires a global reference, though in practice we save
|
||
|
|
* enough by not having a global reference for each file that uses a class such as java.lang.String
|
||
|
|
* which is used in several files.
|
||
|
|
*
|
||
|
|
* FindClass is still called in a couple of situations: when throwing exceptions, and in some of
|
||
|
|
* the serialization code. The former is clearly not a performance case, and we're currently
|
||
|
|
* assuming that neither is the latter.
|
||
|
|
*
|
||
|
|
* TODO: similar arguments hold for field and method IDs; we should cache them centrally too.
|
||
|
|
*/
|
||
|
|
struct JniConstants {
|
||
|
|
static void init(JNIEnv* env);
|
||
|
|
|
||
|
|
static jclass bidiRunClass;
|
||
|
|
static jclass bigDecimalClass;
|
||
|
|
static jclass booleanClass;
|
||
|
|
static jclass byteArrayClass;
|
||
|
|
static jclass byteClass;
|
||
|
|
static jclass calendarClass;
|
||
|
|
static jclass characterClass;
|
||
|
|
static jclass charsetICUClass;
|
||
|
|
static jclass constructorClass;
|
||
|
|
static jclass deflaterClass;
|
||
|
|
static jclass doubleClass;
|
||
|
|
static jclass errnoExceptionClass;
|
||
|
|
static jclass fieldClass;
|
||
|
|
static jclass fieldPositionIteratorClass;
|
||
|
|
static jclass fileDescriptorClass;
|
||
|
|
static jclass floatClass;
|
||
|
|
static jclass gaiExceptionClass;
|
||
|
|
static jclass inet6AddressClass;
|
||
|
|
static jclass inetAddressClass;
|
||
|
|
static jclass inetSocketAddressClass;
|
||
|
|
static jclass inetUnixAddressClass;
|
||
|
|
static jclass inflaterClass;
|
||
|
|
static jclass inputStreamClass;
|
||
|
|
static jclass integerClass;
|
||
|
|
static jclass localeDataClass;
|
||
|
|
static jclass longClass;
|
||
|
|
static jclass methodClass;
|
||
|
|
static jclass mutableIntClass;
|
||
|
|
static jclass mutableLongClass;
|
||
|
|
static jclass objectClass;
|
||
|
|
static jclass objectArrayClass;
|
||
|
|
static jclass outputStreamClass;
|
||
|
|
static jclass parsePositionClass;
|
||
|
|
static jclass patternSyntaxExceptionClass;
|
||
|
|
static jclass realToStringClass;
|
||
|
|
static jclass referenceClass;
|
||
|
|
static jclass shortClass;
|
||
|
|
static jclass socketClass;
|
||
|
|
static jclass socketImplClass;
|
||
|
|
static jclass stringClass;
|
||
|
|
static jclass structAddrinfoClass;
|
||
|
|
static jclass structFlockClass;
|
||
|
|
static jclass structGroupReqClass;
|
||
|
|
static jclass structLingerClass;
|
||
|
|
static jclass structPasswdClass;
|
||
|
|
static jclass structPollfdClass;
|
||
|
|
static jclass structStatClass;
|
||
|
|
static jclass structStatVfsClass;
|
||
|
|
static jclass structTimevalClass;
|
||
|
|
static jclass structUcredClass;
|
||
|
|
static jclass structUtsnameClass;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define NATIVE_METHOD(className, functionName, signature) \
|
||
|
|
{ #functionName, signature, reinterpret_cast<void*>(className ## _ ## functionName) }
|
||
|
|
|
||
|
|
#endif // JNI_CONSTANTS_H_included
|