Fix of crashed 5.1 tree (wrong merge + wrong pullout patch forced us to create a new 5.1 tree)

This is a merge of 5.0 -> 5.1 + some code from old 5.1 tree to get all tests to work and keep the .frm format the same as the old 5.1 tree.

1 files changed, 63 insertions, 0 deletions

diff --git a/sql/sql_plugin.h b/sql/sql_plugin.h
new file mode 100644
index 00000000000..8fb186b62de
--- /dev/null
+++ b/sql/sql_plugin.h
@@ -0,0 +1,63 @@
+/* Copyright (C) 2005 MySQL AB
+
+   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; either version 2 of the License, or
+   (at your option) any later version.
+
+   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, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+#ifndef _sql_plugin_h
+#define _sql_plugin_h
+
+#include <plugin.h>
+
+#define MYSQL_ANY_PLUGIN         -1
+
+enum enum_plugin_state
+{
+  PLUGIN_IS_FREED= 0,
+  PLUGIN_IS_DELETED,
+  PLUGIN_IS_UNINITIALIZED,
+  PLUGIN_IS_READY
+};
+
+/* A handle for the dynamic library containing a plugin or plugins. */
+
+struct st_plugin_dl
+{
+  LEX_STRING dl;
+  void *handle;
+  struct st_mysql_plugin *plugins;
+  int version;
+  uint ref_count;            /* number of plugins loaded from the library */
+};
+
+/* A handle of a plugin */
+
+struct st_plugin_int
+{
+  LEX_STRING name;
+  struct st_mysql_plugin *plugin;
+  struct st_plugin_dl *plugin_dl;
+  enum enum_plugin_state state;
+  uint ref_count;           /* number of threads using the plugin */
+};
+
+extern char *opt_plugin_dir_ptr;
+extern char opt_plugin_dir[FN_REFLEN];
+extern void plugin_init(void);
+extern void plugin_free(void);
+extern my_bool plugin_is_ready(LEX_STRING *name, int type);
+extern st_plugin_int *plugin_lock(LEX_STRING *name, int type);
+extern void plugin_unlock(struct st_plugin_int *plugin);
+extern my_bool mysql_install_plugin(THD *thd, LEX_STRING *name, LEX_STRING *dl);
+extern my_bool mysql_uninstall_plugin(THD *thd, LEX_STRING *name);
+#endif