1 files changed, 147 insertions, 0 deletions
diff --git a/storage/perfschema/table_hosts.cc b/storage/perfschema/table_hosts.cc
new file mode 100644
index 00000000000..8e919ec0724
--- /dev/null
+++ b/storage/perfschema/table_hosts.cc
@@ -0,0 +1,147 @@
+/* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; version 2 of the License.
+
+  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 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,
+  51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
+
+#include "my_global.h"
+#include "my_pthread.h"
+#include "table_hosts.h"
+#include "pfs_instr_class.h"
+#include "pfs_instr.h"
+#include "pfs_account.h"
+#include "pfs_host.h"
+#include "pfs_visitor.h"
+
+THR_LOCK table_hosts::m_table_lock;
+
+static const TABLE_FIELD_TYPE field_types[]=
+{
+  {
+    { C_STRING_WITH_LEN("HOST") },
+    { C_STRING_WITH_LEN("char(60)") },
+    { NULL, 0}
+  },
+  {
+    { C_STRING_WITH_LEN("CURRENT_CONNECTIONS") },
+    { C_STRING_WITH_LEN("bigint(20)") },
+    { NULL, 0}
+  },
+  {
+    { C_STRING_WITH_LEN("TOTAL_CONNECTIONS") },
+    { C_STRING_WITH_LEN("bigint(20)") },
+    { NULL, 0}
+  }
+};
+
+TABLE_FIELD_DEF
+table_hosts::m_field_def=
+{ 3, field_types };
+
+PFS_engine_table_share
+table_hosts::m_share=
+{
+  { C_STRING_WITH_LEN("hosts") },
+  &pfs_truncatable_acl,
+  &table_hosts::create,
+  NULL, /* write_row */
+  table_hosts::delete_all_rows,
+  NULL, /* get_row_count */
+  1000, /* records */
+  sizeof(PFS_simple_index), /* ref length */
+  &m_table_lock,
+  &m_field_def,
+  false /* checked */
+};
+
+PFS_engine_table* table_hosts::create()
+{
+  return new table_hosts();
+}
+
+int
+table_hosts::delete_all_rows(void)
+{
+  reset_events_waits_by_thread();
+  reset_events_waits_by_account();
+  reset_events_waits_by_host();
+  reset_events_stages_by_thread();
+  reset_events_stages_by_account();
+  reset_events_stages_by_host();
+  reset_events_statements_by_thread();
+  reset_events_statements_by_account();
+  reset_events_statements_by_host();
+  purge_all_account();
+  purge_all_host();
+  return 0;
+}
+
+table_hosts::table_hosts()
+  : cursor_by_host(& m_share),
+  m_row_exists(false)
+{}
+
+void table_hosts::make_row(PFS_host *pfs)
+{
+  pfs_lock lock;
+
+  m_row_exists= false;
+  pfs->m_lock.begin_optimistic_lock(&lock);
+
+  if (m_row.m_host.make_row(pfs))
+    return;
+
+  PFS_connection_stat_visitor visitor;
+  PFS_connection_iterator::visit_host(pfs, true, true, & visitor);
+
+  if (! pfs->m_lock.end_optimistic_lock(& lock))
+    return;
+
+  m_row.m_connection_stat.set(& visitor.m_stat);
+  m_row_exists= true;
+}
+
+int table_hosts::read_row_values(TABLE *table,
+                                 unsigned char *buf,
+                                 Field **fields,
+                                 bool read_all)
+{
+  Field *f;
+
+  if (unlikely(! m_row_exists))
+    return HA_ERR_RECORD_DELETED;
+
+  /* Set the null bits */
+  DBUG_ASSERT(table->s->null_bytes == 1);
+  buf[0]= 0;
+
+  for (; (f= *fields) ; fields++)
+  {
+    if (read_all || bitmap_is_set(table->read_set, f->field_index))
+    {
+      switch(f->field_index)
+      {
+      case 0: /* HOST */
+        m_row.m_host.set_field(f);
+        break;
+      case 1: /* CURRENT_CONNECTIONS */
+      case 2: /* TOTAL_CONNECTIONS */
+        m_row.m_connection_stat.set_field(f->field_index - 1, f);
+        break;
+      default:
+        DBUG_ASSERT(false);
+      }
+    }
+  }
+  return 0;
+}
+