MemoryManager.hpp

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#ifndef HTGS_MEMORYMANAGER_H
#define HTGS_MEMORYMANAGER_H

#include <htgs/core/memory/MemoryPool.hpp>

#include <htgs/api/ITask.hpp>
#include <htgs/api/IMemoryAllocator.hpp>
#include <htgs/types/MMType.hpp>

namespace htgs {

template<class T>
class MemoryManager : public ITask<MemoryData<T>, MemoryData<T>> {

 public:
  MemoryManager(std::string name,
                size_t memoryPoolSize,
                std::shared_ptr<IMemoryAllocator<T>> memoryAllocator,
                MMType type) : ITask<
      MemoryData<T>,
      MemoryData<T>>(1, true, false, 0L) {
    this->allocator = memoryAllocator;
    this->memoryPoolSize = memoryPoolSize;
    this->pool = nullptr;
    this->name = name;
    this->type = type;
  }

  ~MemoryManager() override {
    if (this->pool != nullptr) {
      pool->releaseAllMemory();

      delete pool;
      pool = nullptr;
    }
  }

  void initialize() override {
    this->pool = new MemoryPool<T>(this->getMemoryPoolSize());
    std::shared_ptr<AnyConnector> anyInputConnector = this->getOwnerTaskManager()->getInputConnector();
    std::shared_ptr<Connector<MemoryData<T>>> inputConnector = std::static_pointer_cast<Connector<MemoryData<T>>>(anyInputConnector);

    MemoryData<T> *memory = new MemoryData<T>(this->getAllocator(), inputConnector, this->getName(), this->type);

    bool allocate = false;
    if (type == MMType::Static)
      allocate = true;

    this->pool->fillPool(memory, this->getPipelineId(), allocate);
    delete memory;
  }

  void shutdown() override {
//    bool release = false;
//    if (type == MMType::Static)
//      release = true;
//    this->pool->emptyPool(release);
  }

  void executeTask(std::shared_ptr<MemoryData<T>> data) override {
    if (data != nullptr) {
      if (data->getPipelineId() == this->getPipelineId()) {
        data->memoryUsed();

        if (data->canReleaseMemory()) {
          if (type == MMType::Static)
            this->pool->addMemory(data);
          else if (type == MMType::Dynamic) {
            data->memFree();
            this->pool->addMemory(data);
          }
        }

      } else {
        std::cerr << "Memory manager received data from another pipeline!" << std::endl;
      }
    }

    while (!this->pool->isPoolEmpty()) {
      this->addResult(this->pool->getMemory());
    }
  }

  void debug() override {
    HTGS_DEBUG(this->getName() << " max pool size: " << this->memoryPoolSize << " isEmpty? " << this->pool->isPoolEmpty());
  }

  virtual std::string getName() override {
    std::string typeStr;
    switch (this->type) {
      case MMType::Static:typeStr = "static";
        break;
      case MMType::Dynamic:typeStr = "dynamic";
        break;
    }
    return std::string("MM(" + typeStr + "): " + this->name);
  }

  virtual MemoryManager<T> *copy() override {
    return new MemoryManager<T>(this->name, this->memoryPoolSize, this->allocator, this->type);
  }

  virtual size_t getMemoryPoolSize() {
    return this->memoryPoolSize;
  }

  virtual std::shared_ptr<IMemoryAllocator<T>> getAllocator() {
    return this->allocator;
  }

  std::string getMemoryManagerName() { return name; }

  std::string typeName() {
#if defined( __GLIBCXX__ ) || defined( __GLIBCPP__ )
    int status;
    char *realName = abi::__cxa_demangle(typeid(T).name(), 0, 0, &status);
    std::string ret(realName);

    free(realName);

    return ret;
#else
    return typeid(T).name();
#endif
  }

  MMType getType() const { return type; }

  virtual std::string genDot(int flags,
                             std::string dotId,
                             std::shared_ptr<AnyConnector> input,
                             std::shared_ptr<AnyConnector> output) override {

    if ((flags & DOTGEN_FLAG_HIDE_MEM_EDGES) != 0) {
      return "";
    }

    std::ostringstream oss;

    if (output != nullptr) {
      oss << dotId << " -> " << output->getDotId() << "[color=sienna];" << std::endl;
      oss << output->getDotId() << "[label=\"" + this->typeName()
          << "\",style=filled,shape=oval,width=.2,height=.2, fillcolor=sienna, color=sienna];" << std::endl;
    }

    oss << dotId + ";" << std::endl;

    return oss.str();

  }

  std::string getDotFillColor() override {
    return "sienna";
  }

 private:
  std::shared_ptr<IMemoryAllocator<T>> allocator; 
  size_t memoryPoolSize; 
  MemoryPool<T> *pool; 
  std::string name; 
  MMType type; 

};
}

#endif //HTGS_MEMORYMANAGER_H