1 files changed, 83 insertions, 0 deletions
diff --git a/storage/perfschema/cursor_by_thread.cc b/storage/perfschema/cursor_by_thread.cc
new file mode 100644
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--- /dev/null
+++ b/storage/perfschema/cursor_by_thread.cc
@@ -0,0 +1,83 @@
+/* Copyright (c) 2011, 2023, Oracle and/or its affiliates.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License, version 2.0,
+  as published by the Free Software Foundation.
+
+  This program is also distributed with certain software (including
+  but not limited to OpenSSL) that is licensed under separate terms,
+  as designated in a particular file or component or in included license
+  documentation.  The authors of MySQL hereby grant you an additional
+  permission to link the program and your derivative works with the
+  separately licensed software that they have included with MySQL.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License, version 2.0, for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335  USA */
+
+/**
+  @file storage/perfschema/cursor_by_thread.cc
+  Cursor CURSOR_BY_THREAD (implementation).
+*/
+
+#include "my_global.h"
+#include "cursor_by_thread.h"
+#include "pfs_instr.h"
+#include "pfs_buffer_container.h"
+
+ha_rows
+cursor_by_thread::get_row_count(void)
+{
+  return global_thread_container.get_row_count();
+}
+
+cursor_by_thread::cursor_by_thread(const PFS_engine_table_share *share)
+  : PFS_engine_table(share, &m_pos),
+    m_pos(0), m_next_pos(0)
+{}
+
+void cursor_by_thread::reset_position(void)
+{
+  m_pos.m_index= 0;
+  m_next_pos.m_index= 0;
+}
+
+int cursor_by_thread::rnd_next(void)
+{
+  PFS_thread *pfs;
+
+  m_pos.set_at(&m_next_pos);
+  PFS_thread_iterator it= global_thread_container.iterate(m_pos.m_index);
+  pfs= it.scan_next(& m_pos.m_index);
+  if (pfs != NULL)
+  {
+    make_row(pfs);
+    m_next_pos.set_after(&m_pos);
+    return 0;
+  }
+
+  return HA_ERR_END_OF_FILE;
+}
+
+int
+cursor_by_thread::rnd_pos(const void *pos)
+{
+  PFS_thread *pfs;
+
+  set_position(pos);
+
+  pfs= global_thread_container.get(m_pos.m_index);
+  if (pfs != NULL)
+  {
+    make_row(pfs);
+    return 0;
+  }
+
+  return HA_ERR_RECORD_DELETED;
+}
+