MemoryPool.hpp

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#ifndef HTGS_MEMORYPOOL_HPP
#define HTGS_MEMORYPOOL_HPP

#include <list>
#include <iostream>
#include <memory>
#include <htgs/types/Types.hpp>
#include <htgs/debug/debug_message.hpp>
#include <htgs/core/queue/BlockingQueue.hpp>

namespace htgs {

template<class V>
class MemoryData;

template<class T>
class MemoryPool {
 public:
  MemoryPool(size_t queueSize) {
    this->memoryQueue = new BlockingQueue<m_data_t<T>>(queueSize);
    this->allMemory = new std::list<m_data_t<T>>();
    this->queueSize = queueSize;
  }

  ~MemoryPool() {
    delete memoryQueue;
    memoryQueue = nullptr;

    delete allMemory;
    allMemory = nullptr;

  }

  void releaseAllMemory() {
    for (m_data_t<T> mem : *allMemory) {
      if (mem) {
        mem->memFree();
      }
    }
  }

  void fillPool(MemoryData<T> *memory, size_t pipelineId, bool allocate) const {
    size_t remainingSize = this->memoryQueue->remainingCapacity();

    HTGS_DEBUG("Inserting " << remainingSize << " elements to memory pool");

    for (size_t i = 0; i < remainingSize; i++) {

      MemoryData<T> *newMemory = memory->copy();
      HTGS_DEBUG_VERBOSE("Adding memory " << newMemory);

      newMemory->setPipelineId(pipelineId);

      // Allocates only if asked, used for dynamic and user mananaged memory
      if (allocate)
        newMemory->memAlloc();

      std::shared_ptr<MemoryData<T>> shrMem = std::shared_ptr<MemoryData<T>>(newMemory);
      this->memoryQueue->Enqueue(shrMem);
      this->allMemory->push_back(shrMem);
    }
  }

  MemoryPool<T> *copy() { return new MemoryPool<T>(this->queueSize); }

  bool isPoolEmpty() const { return this->memoryQueue->isEmpty(); }

  void emptyPool(bool free) const {
    size_t poolSize = this->memoryQueue->size();
    for (size_t i = 0; i < poolSize; i++) {
      m_data_t<T> memory = this->memoryQueue->remove();
      if (free)
        memory->memFree();

    }
  }

  m_data_t <T> getMemory() const {
    return this->memoryQueue->Dequeue();
  }

  void addMemory(m_data_t <T> o) const {
    this->memoryQueue->Enqueue(o);
  }

 private:
  std::list<m_data_t <T>> *allMemory; 
  BlockingQueue <m_data_t<T>> *memoryQueue; 
  size_t queueSize; 

};
}

#endif //HTGS_MEMORYPOOL_HPP