MySQL 源码解读 -- Dictionary_client

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MySQL 源码解读 -- Dictionary_client

结构介绍

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Dictionary_client {
  class Auto_releaser; // 子类
  std::vector<Entity_object *> m_uncached_objects;  // Objects to be deleted.
  Object_registry m_registry_committed;    // Registry of committed objects.
  Object_registry m_registry_uncommitted;  // Registry of uncommitted objects.
  Object_registry m_registry_dropped;      // Registry of dropped objects.
  THD *m_thd;                        // Thread context, needed for cache misses.
  Auto_releaser m_default_releaser;  // Default auto releaser.
  Auto_releaser *m_current_releaser;  // Current auto releaser.
}


Auto_releaser {
    Dictionary_client *m_client;
    Object_registry m_release_registry;
    Auto_releaser *m_prev;

    void auto_release(Cache_element<T> *element) //Register an object to be auto released.
    void transfer_release(const T *object); //Transfer an object from the current to the previous auto releaser.
}

Dictionary_client::Auto_releaser::Auto_releaser(Dictionary_client *client)
    : m_client(client), m_prev(client->m_current_releaser) {
  m_client->m_current_releaser = this;
}