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#ifndef MOZC_CONVERTER_NODE_ALLOCATOR_H_
#define MOZC_CONVERTER_NODE_ALLOCATOR_H_

#include "base/freelist.h"
#include "base/logging.h"
#include "base/port.h"
#include "converter/node.h"

namespace mozc {

class NodeAllocator {
 public:
  NodeAllocator() : node_freelist_(1024), max_nodes_size_(8192),
                    node_count_(0) {}
  ~NodeAllocator() {}

  Node *NewNode() {
    Node *node = node_freelist_.Alloc();
    DCHECK(node);
    node->Init();
    ++node_count_;
    return node;
  }

  // Frees all nodes allocateed by NewNode().
  void Free() {
    node_freelist_.Free();
    node_count_ = 0;
  }

  size_t max_nodes_size() const {
    return max_nodes_size_;
  }

  void set_max_nodes_size(size_t max_nodes_size) {
    max_nodes_size_ = max_nodes_size;
  }

  size_t node_count() const {
    return node_count_;
  }

 private:
  FreeList<Node> node_freelist_;
  size_t max_nodes_size_;
  size_t node_count_;

  DISALLOW_COPY_AND_ASSIGN(NodeAllocator);
};

}  // namespace mozc

#endif  // MOZC_CONVERTER_NODE_ALLOCATOR_H_