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71681467ca
state_mask argument to plugin_foreach() sql/sql_show.cc: state_mask argument to plugin_foreach()
89 lines
3.2 KiB
C
89 lines
3.2 KiB
C
/* Copyright (C) 2005 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#ifndef _sql_plugin_h
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#define _sql_plugin_h
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/*
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the following #define adds server-only members to enum_mysql_show_type,
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that is defined in plugin.h
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*/
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#define SHOW_FUNC SHOW_FUNC, SHOW_KEY_CACHE_LONG, SHOW_KEY_CACHE_LONGLONG, \
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SHOW_LONG_STATUS, SHOW_DOUBLE_STATUS, SHOW_HAVE, \
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SHOW_MY_BOOL, SHOW_HA_ROWS, SHOW_SYS, SHOW_LONG_NOFLUSH
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#include <mysql/plugin.h>
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#undef SHOW_FUNC
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typedef enum enum_mysql_show_type SHOW_TYPE;
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typedef struct st_mysql_show_var SHOW_VAR;
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#define MYSQL_ANY_PLUGIN -1
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/*
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different values of st_plugin_int::state
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though they look like a bitmap, plugin may only
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be in one of those eigenstates, not in a superposition of them :)
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It's a bitmap, because it makes it easier to test
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"whether the state is one of those..."
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*/
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#define PLUGIN_IS_FREED 1
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#define PLUGIN_IS_DELETED 2
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#define PLUGIN_IS_UNINITIALIZED 4
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#define PLUGIN_IS_READY 8
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/* A handle for the dynamic library containing a plugin or plugins. */
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struct st_plugin_dl
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{
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LEX_STRING dl;
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void *handle;
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struct st_mysql_plugin *plugins;
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int version;
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uint ref_count; /* number of plugins loaded from the library */
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};
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/* A handle of a plugin */
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struct st_plugin_int
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{
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LEX_STRING name;
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struct st_mysql_plugin *plugin;
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struct st_plugin_dl *plugin_dl;
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uint state;
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uint ref_count; /* number of threads using the plugin */
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void *data; /* plugin type specific, e.g. handlerton */
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};
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typedef int (*plugin_type_init)(struct st_plugin_int *);
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extern char *opt_plugin_dir_ptr;
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extern char opt_plugin_dir[FN_REFLEN];
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extern const LEX_STRING plugin_type_names[];
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extern int plugin_init(int);
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extern void plugin_shutdown(void);
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extern my_bool plugin_is_ready(const LEX_STRING *name, int type);
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extern st_plugin_int *plugin_lock(const LEX_STRING *name, int type);
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extern void plugin_unlock(struct st_plugin_int *plugin);
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extern my_bool mysql_install_plugin(THD *thd, const LEX_STRING *name, const LEX_STRING *dl);
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extern my_bool mysql_uninstall_plugin(THD *thd, const LEX_STRING *name);
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typedef my_bool (plugin_foreach_func)(THD *thd,
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st_plugin_int *plugin,
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void *arg);
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#define plugin_foreach(A,B,C,D) plugin_foreach_with_mask(A,B,C,PLUGIN_IS_READY,D)
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extern my_bool plugin_foreach_with_mask(THD *thd, plugin_foreach_func *func,
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int type, uint state_mask, void *arg);
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#endif
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