121 lines
3.4 KiB
C
121 lines
3.4 KiB
C
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* JNI helper functions.
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*
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* This file may be included by C or C++ code, which is trouble because jni.h
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* uses different typedefs for JNIEnv in each language.
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*/
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#ifndef _NATIVEHELPER_JNIHELP_H
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#define _NATIVEHELPER_JNIHELP_H
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#include "jni.h"
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#include "utils/Log.h"
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#ifndef NELEM
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# define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0])))
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Register one or more native methods with a particular class.
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*/
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int jniRegisterNativeMethods(C_JNIEnv* env, const char* className,
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const JNINativeMethod* gMethods, int numMethods);
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/*
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* Throw an exception with the specified class and an optional message.
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* The "className" argument will be passed directly to FindClass, which
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* takes strings with slashes (e.g. "java/lang/Object").
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*
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* Returns 0 on success, nonzero if something failed (e.g. the exception
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* class couldn't be found).
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*
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* Currently aborts the VM if it can't throw the exception.
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*/
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int jniThrowException(C_JNIEnv* env, const char* className, const char* msg);
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/*
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* Throw a java.lang.RuntimeException, with an optional message.
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*/
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int jniThrowRuntimeException(JNIEnv* env, const char* msg);
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/*
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* Throw a java.io.IOException, generating the message from errno.
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*/
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int jniThrowIOException(C_JNIEnv* env, int errnum);
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/*
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* Create a java.io.FileDescriptor given an integer fd
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*/
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jobject jniCreateFileDescriptor(C_JNIEnv* env, int fd);
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/*
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* Get an int file descriptor from a java.io.FileDescriptor
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*/
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int jniGetFDFromFileDescriptor(C_JNIEnv* env, jobject fileDescriptor);
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/*
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* Set an int file descriptor to a java.io.FileDescriptor
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*/
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void jniSetFileDescriptorOfFD(C_JNIEnv* env, jobject fileDescriptor, int value);
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#ifdef __cplusplus
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}
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#endif
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/*
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* For C++ code, we provide inlines that map to the C functions. g++ always
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* inlines these, even on non-optimized builds.
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*/
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#if defined(__cplusplus) && !defined(JNI_FORCE_C)
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inline int jniRegisterNativeMethods(JNIEnv* env, const char* className,
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const JNINativeMethod* gMethods, int numMethods)
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{
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return jniRegisterNativeMethods(&env->functions, className, gMethods,
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numMethods);
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}
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inline int jniThrowException(JNIEnv* env, const char* className,
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const char* msg)
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{
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return jniThrowException(&env->functions, className, msg);
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}
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inline int jniThrowIOException(JNIEnv* env, int errnum)
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{
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return jniThrowIOException(&env->functions, errnum);
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}
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inline jobject jniCreateFileDescriptor(JNIEnv* env, int fd)
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{
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return jniCreateFileDescriptor(&env->functions, fd);
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}
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inline int jniGetFDFromFileDescriptor(JNIEnv* env, jobject fileDescriptor)
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{
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return jniGetFDFromFileDescriptor(&env->functions, fileDescriptor);
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}
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inline void jniSetFileDescriptorOfFD(JNIEnv* env, jobject fileDescriptor,
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int value)
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{
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return jniSetFileDescriptorOfFD(&env->functions, fileDescriptor, value);
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}
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#endif
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#endif /*_NATIVEHELPER_JNIHELP_H*/
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