Home | History | Annotate | Download | only in foundation 
      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include "ABuffer.h"
     18 
     19 #include "ADebug.h"
     20 #include "ALooper.h"
     21 #include "AMessage.h"
     22 
     23 namespace android {
     24 
     25 ABuffer::ABuffer(size_t capacity)
     26     : mRangeOffset(0),
     27       mInt32Data(0),
     28       mOwnsData(true) {
     29     mData = malloc(capacity);
     30     if (mData == NULL) {
     31         mCapacity = 0;
     32         mRangeLength = 0;
     33     } else {
     34         mCapacity = capacity;
     35         mRangeLength = capacity;
     36     }
     37 }
     38 
     39 ABuffer::ABuffer(void *data, size_t capacity)
     40     : mData(data),
     41       mCapacity(capacity),
     42       mRangeOffset(0),
     43       mRangeLength(capacity),
     44       mInt32Data(0),
     45       mOwnsData(false) {
     46 }
     47 
     48 // static
     49 sp<ABuffer> ABuffer::CreateAsCopy(const void *data, size_t capacity)
     50 {
     51     sp<ABuffer> res = new ABuffer(capacity);
     52     if (res->base() == NULL) {
     53         return NULL;
     54     }
     55     memcpy(res->data(), data, capacity);
     56     return res;
     57 }
     58 
     59 ABuffer::~ABuffer() {
     60     if (mOwnsData) {
     61         if (mData != NULL) {
     62             free(mData);
     63             mData = NULL;
     64         }
     65     }
     66 }
     67 
     68 void ABuffer::setRange(size_t offset, size_t size) {
     69     CHECK_LE(offset, mCapacity);
     70     CHECK_LE(offset + size, mCapacity);
     71 
     72     mRangeOffset = offset;
     73     mRangeLength = size;
     74 }
     75 
     76 sp<AMessage> ABuffer::meta() {
     77     if (mMeta == NULL) {
     78         mMeta = new AMessage;
     79     }
     80     return mMeta;
     81 }
     82 
     83 }  // namespace android
     84 
     85