Remove the ObjectPool from trantor.

web_backends/drogon/trantor/utils/ObjectPool.h

@@ -1,76 +0,0 @@
-/**
- *
- *  @file ObjectPool.h
- *  @author An Tao
- *
- *  Public header file in trantor lib.
- *
- *  Copyright 2018, An Tao.  All rights reserved.
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the License file.
- *
- *
- */
-
-#pragma once
-
-#include <trantor/utils/NonCopyable.h>
-#include <vector>
-#include <memory>
-#include <type_traits>
-#include <mutex>
-
-namespace trantor
-{
-/**
- * @brief This class template represents a object pool.
- *
- * @tparam T
- */
-template <typename T>
-class ObjectPool : public NonCopyable,
-                   public std::enable_shared_from_this<ObjectPool<T>>
-{
-  public:
-    std::shared_ptr<T> getObject()
-    {
-        static_assert(!std::is_pointer<T>::value,
-                      "The parameter type of the ObjectPool template can't be "
-                      "pointer type");
-        T *p{nullptr};
-        {
-            std::lock_guard<std::mutex> lock(mtx_);
-            if (!objs_.empty())
-            {
-                p = objs_.back();
-                objs_.pop_back();
-            }
-        }
-
-        if (p == nullptr)
-        {
-            p = new T;
-        }
-
-        assert(p);
-        std::weak_ptr<ObjectPool<T>> weakPtr = this->shared_from_this();
-        auto obj = std::shared_ptr<T>(p, [weakPtr](T *ptr) {
-            auto self = weakPtr.lock();
-            if (self)
-            {
-                std::lock_guard<std::mutex> lock(self->mtx_);
-                self->objs_.push_back(ptr);
-            }
-            else
-            {
-                delete ptr;
-            }
-        });
-        return obj;
-    }
-
-  private:
-    std::vector<T *> objs_;
-    std::mutex mtx_;
-};
-}  // namespace trantor