C++ pool类代码示例

 ~iuPool()
 {
     // すべて解放する
     for( pool::iterator it=m_pool.begin(); it != m_pool.end(); )
     {
         value_ptr p = *it;
         it = m_pool.erase(it);
         delete p;
     }
 }

void InterConnection::test() 
{
  TestMessage* t;
  for (ushort i = 0; i < rPolicy->getnRouters(); i++) {
    t = tmpool.out();
    t->init(i, PortID_t(100), 0, PortID_t(101), Message::RCV_AND_PASS);
    t->setSize(100);
    routers[i]->launchMsg(t);
    t = tmpool.out();
    t->init(i, PortID_t(100), 0, PortID_t(101), Message::RCV);
    t->setSize(100);
    routers[i]->launchMsg(t);
  }
}

 static bool is_from(void * const ptr)
 { //! Equivalent to SingletonPool::p.is_from(chunk); synchronized.
   //! \returns true if chunk is from SingletonPool::is_from(chunk)
   pool_type & p = get_pool();
   details::pool::guard<Mutex> g(p);
   return p.is_from(ptr);
 }

 node* alloc_node(node* lptr, node* rptr, T const& v,
                  tag_t ltag = 0, tag_t rtag = 0)
 {
     node* chunk = pool_.allocate();
     new (chunk) node(lptr, rptr, v, ltag, rtag);
     return chunk;
 }

void TestMessage::garbageCollect() 
{
    refCount--;
    if (refCount == 0) {
      LOG("destroying TestMessage");
      tmpool.in(this); 
    }
}

 void push(value_ptr ptr) { m_pool.push_back(ptr); }

 static bool purge_memory()
 { //! Equivalent to SingletonPool::p.purge_memory(); synchronized.
   pool_type & p = get_pool();
   details::pool::guard<Mutex> g(p);
   return p.purge_memory();
 }

 void dealloc_node(node* n)
 {
     n->~node();
     pool_.deallocate(n);
 }

 static void ordered_free(void * const ptr, const size_type n)
 { //! Equivalent to SingletonPool::p.ordered_free(chunk, n); synchronized.
   pool_type & p = get_pool();
   details::pool::guard<Mutex> g(p);
   p.ordered_free(ptr, n);
 }

 static void * ordered_malloc(const size_type n)
 { //! Equivalent to SingletonPool::p.ordered_malloc(n); synchronized.
   pool_type & p = get_pool();
   details::pool::guard<Mutex> g(p);
   return p.ordered_malloc(n);
 }

 buffer_ptr buffer()
 {
     return buffer_ptr(m_pool.get(), m_deleter);
 }

void *SmallObject::operator new(size_t size)
{
    return mem_pool.allocate(size);
}

void TaggedPrefetcher::processAck(PAddr addr)
{
  uint paddr = addr & defaultMask;

  penFetchSet::iterator itF = pendingFetches.find(paddr);
  if(itF == pendingFetches.end()) 
    return;

  bLine *l = buff->fillLine(paddr);

  penReqMapper::iterator it = pendingRequests.find(paddr);

  if(it != pendingRequests.end()) {
    LOG("NLAP: returnAccess [%08lx]", paddr);
    std::queue<MemRequest *> *tmpReqQueue;
    tmpReqQueue = (*it).second;
    while (tmpReqQueue->size()) {
      tmpReqQueue->front()->goUpAbs(nextBuffSlot());
      tmpReqQueue->pop();
    }
    pendingRequests.erase(paddr);
    activeMemReqPool.in(tmpReqQueue);
  }
  pendingFetches.erase(paddr);
}

void MarkovPrefetcher::read(MemRequest *mreq)
{
  uint32_t paddr = mreq->getPAddr() & defaultMask;
  bLine *l = buff->readLine(paddr);

  if(l) { //hit
    LOG("GHBP: hit on [%08lx]", paddr);
    hit.inc();
    mreq->goUpAbs(nextBuffSlot());
    return;
  }

  penFetchSet::iterator it = pendingFetches.find(paddr);
  if(it != pendingFetches.end()) { // half-miss
    //LOG("GHBP: half-miss on %08lx", paddr);
    halfMiss.inc();
    penReqMapper::iterator itR = pendingRequests.find(paddr);

    if (itR == pendingRequests.end()) {
      pendingRequests[paddr] = activeMemReqPool.out();
      itR = pendingRequests.find(paddr);
    }

    I(itR != pendingRequests.end());
    
    (*itR).second->push(mreq);
    return;
  }

  //LOG("GHBP: miss on [%08lx]", paddr);
  miss.inc();
  mreq->goDown(0, lowerLevel[0]);
}

void AlwaysPrefetch::read(MemRequest *mreq)
{
  uint32_t paddr = mreq->getPAddr() & defaultMask;
  bLine *l = buff->readLine(paddr);

  if(l) { //hit
    LOG("NLAP: hit on [%08lx]", (long unsigned int) paddr);
    hit.inc();    
    mreq->goUpAbs(nextBuffSlot());
    return;
  }

  penFetchSet::iterator it = pendingFetches.find(paddr);
  if(it != pendingFetches.end()) { // half-miss
    LOG("NLAP: half-miss on %08lx",(long unsigned int)  paddr);
    penReqMapper::iterator itR = pendingRequests.find(paddr);
    halfMiss.inc();
    if (itR == pendingRequests.end()) {
      pendingRequests[paddr] = activeMemReqPool.out();
      itR = pendingRequests.find(paddr);
    }

    I(itR != pendingRequests.end());
    
    (*itR).second->push(mreq);
    //prefetch(paddr+lineSize, 0); 
    //prefetch( paddr + buff->getLineSize(), 0 ); 
    return;
  }

  LOG("NLAP: miss on [%08lx]", (long unsigned int) paddr);
  miss.inc();

  Time_t lat = nextTableSlot() - globalClock;    

  prefetch(paddr+(buff->getLineSize()), lat);
  lat = nextTableSlot() - globalClock;    
  prefetch(paddr+(2*buff->getLineSize()), lat); 
  mreq->goDown(0, lowerLevel[0]);
}