86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
/*-------------------------------------------------------------------------
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* drawElements C++ Base Library
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* -----------------------------
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*
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* Copyright 2014 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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* \file
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* \brief Ring buffer template.
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*//*--------------------------------------------------------------------*/
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#include "deRingBuffer.hpp"
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#include "deRandom.hpp"
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#include <vector>
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using std::vector;
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namespace de
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{
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void RingBuffer_selfTest (void)
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{
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const int numIterations = 16;
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for (int iterNdx = 0; iterNdx < numIterations; iterNdx++)
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{
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Random rnd (iterNdx);
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int bufSize = rnd.getInt(1, 2048);
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int dataSize = rnd.getInt(100, 10000);
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RingBuffer<int> buffer (bufSize);
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vector<int> data (dataSize);
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for (int i = 0; i < dataSize; i++)
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data[i] = i;
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int writePos = 0;
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int readPos = 0;
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while (writePos < dataSize || readPos < dataSize)
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{
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bool canRead = buffer.getNumElements() > 0;
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bool canWrite = writePos < dataSize && buffer.getNumFree() > 0;
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bool doRead = canRead && (!canWrite || rnd.getBool());
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// Free count must match.
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DE_TEST_ASSERT(buffer.getNumFree() == bufSize - (writePos-readPos));
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if (doRead)
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{
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int numBytes = rnd.getInt(1, buffer.getNumElements());
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vector<int> tmp (numBytes);
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buffer.popBack(&tmp[0], numBytes);
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for (int i = 0; i < numBytes; i++)
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DE_TEST_ASSERT(tmp[i] == data[readPos+i]);
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readPos += numBytes;
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}
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else
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{
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DE_TEST_ASSERT(canWrite);
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int numBytes = rnd.getInt(1, de::min(dataSize-writePos, buffer.getNumFree()));
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buffer.pushFront(&data[writePos], numBytes);
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writePos += numBytes;
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}
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}
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}
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}
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} // de
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