genericopenlibs/cppstdlib/stl/test/unit/allocator_test.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 16 Apr 2010 16:46:38 +0300
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permissions -rw-r--r--
Revision: 201011 Kit: 201015
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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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*
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*/
0
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#include <memory>
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#include <vector>
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#include <cstdio>
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#include "cppunit/cppunit_proxy.h"
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#if !defined (STLPORT) || defined(_STLP_USE_NAMESPACES)
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using namespace std;
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#endif
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//
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// TestCase class
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//
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class AllocatorTest : public CPPUNIT_NS::TestCase
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{
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  CPPUNIT_TEST_SUITE(AllocatorTest);
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  CPPUNIT_TEST(zero_allocation);
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#if !defined (STLPORT) || defined (_STLP_USE_EXCEPTIONS)
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  CPPUNIT_TEST(bad_alloc_test);
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#endif
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#if defined (STLPORT) && defined (_STLP_THREADS) && defined (_STLP_USE_PERTHREAD_ALLOC)
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  CPPUNIT_TEST(per_thread_alloc);
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#endif
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  CPPUNIT_TEST_SUITE_END();
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protected:
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  void zero_allocation();
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  void bad_alloc_test();
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  void per_thread_alloc();
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};
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CPPUNIT_TEST_SUITE_REGISTRATION(AllocatorTest);
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//
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// tests implementation
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//
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void AllocatorTest::zero_allocation()
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{
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  typedef allocator<char> CharAllocator;
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  CharAllocator charAllocator;
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  char* buf = charAllocator.allocate(0);
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  charAllocator.deallocate(buf, 0);
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  charAllocator.deallocate(0, 0);
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}
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#if !defined (STLPORT) || defined (_STLP_USE_EXCEPTIONS)
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struct BigStruct
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{
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  char _data[4096];
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};
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void AllocatorTest::bad_alloc_test()
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{
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  typedef allocator<BigStruct> BigStructAllocType;
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  BigStructAllocType bigStructAlloc;
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  try {
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    //Lets try to allocate almost 4096 Go (on most of the platforms) of memory:
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    BigStructAllocType::pointer pbigStruct = bigStructAlloc.allocate(1024 * 1024 * 1024);
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    //Allocation failed but no exception thrown
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    CPPUNIT_ASSERT( pbigStruct != 0 );
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  }
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  catch (bad_alloc const&) {
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  }
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  catch (...) {
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    //We shouldn't be there:
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    //Not bad_alloc exception thrown.
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    CPPUNIT_ASSERT( false );
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  }
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}
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#endif
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#if defined (STLPORT) && defined (_STLP_THREADS) && defined (_STLP_USE_PERTHREAD_ALLOC)
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#  include <pthread.h>
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class SharedDatas
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{
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public:
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  typedef vector<int, per_thread_allocator<int> > thread_vector;
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  SharedDatas(size_t nbElems) : threadVectors(nbElems, (thread_vector*)0) {
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    pthread_mutex_init(&mutex, 0);
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    pthread_cond_init(&condition, 0);
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  }
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  ~SharedDatas() {
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    for (size_t i = 0; i < threadVectors.size(); ++i) {
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      delete threadVectors[i];
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    }
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  }
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  size_t initThreadVector() {
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    size_t ret;
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    pthread_mutex_lock(&mutex);
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    for (size_t i = 0; i < threadVectors.size(); ++i) {
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      if (threadVectors[i] == 0) {
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        threadVectors[i] = new thread_vector();
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        ret = i;
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        break;
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      }
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    }
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    if (ret != threadVectors.size() - 1) {
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      //We wait for other thread(s) to call this method too:
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      printf("Thread %d wait\n", ret);
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      pthread_cond_wait(&condition, &mutex);
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    }
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    else {
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      //We are the last thread calling this method, we signal this
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      //to the other thread(s) that might be waiting:
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      printf("Thread %d signal\n", ret);
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      pthread_cond_signal(&condition);
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    }
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    pthread_mutex_unlock(&mutex);
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    return ret;
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  }
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  thread_vector& getThreadVector(size_t index) {
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    //We return other thread thread_vector instance:
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    return *threadVectors[(index + 1 == threadVectors.size()) ? 0 : index + 1];
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  }
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private:
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  pthread_mutex_t mutex;
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  pthread_cond_t condition;
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  vector<thread_vector*> threadVectors;
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};
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void* f(void* pdatas) {
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  SharedDatas *psharedDatas = (SharedDatas*)pdatas;
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  int threadIndex = psharedDatas->initThreadVector();
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  for (int i = 0; i < 100; ++i) {
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    psharedDatas->getThreadVector(threadIndex).push_back(i);
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  }
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  return 0;
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}
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   165
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void AllocatorTest::per_thread_alloc()
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{
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  const size_t nth = 2;
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  SharedDatas datas(nth);
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  pthread_t t[nth];
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  size_t i;
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  for (i = 0; i < nth; ++i) {
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    pthread_create(&t[i], 0, f, &datas);
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  }
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  for (i = 0; i < nth; ++i ) {
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    pthread_join(t[i], 0);
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  }
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}
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#endif