| /* |
| * Copyright (C) 2008 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. |
| */ |
| |
| #include "android_nio_utils.h" |
| |
| #include "core_jni_helpers.h" |
| |
| void* android::nio_getPointer(JNIEnv *_env, jobject buffer, jarray *array) { |
| assert(array); |
| |
| jint position; |
| jint limit; |
| jint elementSizeShift; |
| jlong pointer = jniGetNioBufferFields(_env, buffer, &position, &limit, &elementSizeShift); |
| if (pointer != 0L) { |
| pointer += position << elementSizeShift; |
| return reinterpret_cast<void*>(pointer); |
| } |
| |
| jint offset = jniGetNioBufferBaseArrayOffset(_env, buffer); |
| *array = jniGetNioBufferBaseArray(_env, buffer); |
| void * data = _env->GetPrimitiveArrayCritical(*array, (jboolean *) 0); |
| return reinterpret_cast<void*>(reinterpret_cast<char*>(data) + offset); |
| } |
| |
| |
| void android::nio_releasePointer(JNIEnv *_env, jarray array, void *data, |
| jboolean commit) { |
| _env->ReleasePrimitiveArrayCritical(array, data, |
| commit ? 0 : JNI_ABORT); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| android::AutoBufferPointer::AutoBufferPointer(JNIEnv* env, jobject nioBuffer, |
| jboolean commit) { |
| fEnv = env; |
| fCommit = commit; |
| fPointer = android::nio_getPointer(env, nioBuffer, &fArray); |
| } |
| |
| android::AutoBufferPointer::~AutoBufferPointer() { |
| if (NULL != fArray) { |
| android::nio_releasePointer(fEnv, fArray, fPointer, fCommit); |
| } |
| } |