ceph/src/librbd/AsyncOperation.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 #ifndef LIBRBD_ASYNC_OPERATION_H
   4 #define LIBRBD_ASYNC_OPERATION_H
   5
   6 #include "include/assert.h"
   7 #include "include/xlist.h"
   8 #include <list>
   9
  10 class Context;
  11
  12 namespace librbd {
  13
  14 class ImageCtx;
  15
  16 class AsyncOperation {
  17 public:
  18
  19   AsyncOperation()
  20     : m_image_ctx(NULL), m_xlist_item(this)
  21   {
  22   }
  23
  24   ~AsyncOperation()
  25   {
  26     assert(!m_xlist_item.is_on_list());
  27   }
  28
  29   inline bool started() const {
  30     return m_xlist_item.is_on_list();
  31   }
  32
  33   void start_op(ImageCtx &image_ctx);
  34   void finish_op();
  35
  36   void add_flush_context(Context *on_finish);
  37
  38 private:
  39
  40   ImageCtx *m_image_ctx;
  41   xlist<AsyncOperation *>::item m_xlist_item;
  42   std::list<Context *> m_flush_contexts;
  43
  44 };
  45
  46 } // namespace librbd
  47
  48 #endif // LIBRBD_ASYNC_OPERATION_H