New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/base/shared_buffer_manager.cpp

@@ -0,0 +1,42 @@
+#include "base/shared_buffer_manager.hpp"
+
+SharedBufferManager & SharedBufferManager::instance()
+{
+  static SharedBufferManager i;
+  return i;
+}
+
+void SharedBufferManager::clearReserved()
+{
+  std::lock_guard g(m_mutex);
+  m_sharedBuffers.clear();
+}
+
+SharedBufferManager::shared_buffer_ptr_t SharedBufferManager::reserveSharedBuffer(size_t s)
+{
+  std::lock_guard g(m_mutex);
+
+  shared_buffer_ptr_list_t & l = m_sharedBuffers[s];
+
+  if (l.empty())
+    l.push_back(std::make_shared<shared_buffer_t>(s));
+
+  shared_buffer_ptr_t res = l.front();
+  l.pop_front();
+
+  return res;
+}
+
+void SharedBufferManager::freeSharedBuffer(size_t s, shared_buffer_ptr_t buf)
+{
+  std::lock_guard g(m_mutex);
+
+  shared_buffer_ptr_list_t & l = m_sharedBuffers[s];
+
+  l.push_back(buf);
+}
+
+uint8_t * SharedBufferManager::GetRawPointer(shared_buffer_ptr_t ptr)
+{
+  return &((*ptr)[0]);
+}