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/* Copyright (C) 2005 MySQL AB, 2008-2009 Sun Microsystems, Inc
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, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef _sql_plugin_h
#define _sql_plugin_h
/*
the following #define adds server-only members to enum_mysql_show_type,
that is defined in plugin.h
*/
#define SHOW_always_last SHOW_KEY_CACHE_LONG, \
SHOW_KEY_CACHE_LONGLONG, SHOW_LONG_STATUS, SHOW_DOUBLE_STATUS, \
SHOW_HAVE, SHOW_MY_BOOL, SHOW_HA_ROWS, SHOW_SYS, \
SHOW_LONG_NOFLUSH, SHOW_LONGLONG_STATUS, SHOW_LEX_STRING
#include <mysql/plugin.h>
#undef SHOW_always_last
#include "m_string.h" /* LEX_STRING */
#include "my_alloc.h" /* MEM_ROOT */
class sys_var;
enum SHOW_COMP_OPTION { SHOW_OPTION_YES, SHOW_OPTION_NO, SHOW_OPTION_DISABLED};
#include <my_sys.h>
#ifdef DBUG_OFF
#define plugin_ref_to_int(A) A
#define plugin_int_to_ref(A) A
#else
#define plugin_ref_to_int(A) (A ? A[0] : NULL)
#define plugin_int_to_ref(A) &(A)
#endif
/*
the following flags are valid for plugin_init()
*/
#define PLUGIN_INIT_SKIP_DYNAMIC_LOADING 1
#define PLUGIN_INIT_SKIP_PLUGIN_TABLE 2
#define PLUGIN_INIT_SKIP_INITIALIZATION 4
#define INITIAL_LEX_PLUGIN_LIST_SIZE 16
typedef enum enum_mysql_show_type SHOW_TYPE;
typedef struct st_mysql_show_var SHOW_VAR;
typedef struct st_mysql_lex_string LEX_STRING;
#define MYSQL_ANY_PLUGIN -1
/*
different values of st_plugin_int::state
though they look like a bitmap, plugin may only
be in one of those eigenstates, not in a superposition of them :)
It's a bitmap, because it makes it easier to test
"whether the state is one of those..."
*/
#define PLUGIN_IS_FREED 1
#define PLUGIN_IS_DELETED 2
#define PLUGIN_IS_UNINITIALIZED 4
#define PLUGIN_IS_READY 8
#define PLUGIN_IS_DYING 16
#define PLUGIN_IS_DISABLED 32
/* 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;
uint state;
uint ref_count; /* number of threads using the plugin */
void *data; /* plugin type specific, e.g. handlerton */
MEM_ROOT mem_root; /* memory for dynamic plugin structures */
sys_var *system_vars; /* server variables for this plugin */
bool is_mandatory; /* If true then plugin must not fail to load */
};
/*
See intern_plugin_lock() for the explanation for the
conditionally defined plugin_ref type
*/
#ifdef DBUG_OFF
typedef struct st_plugin_int *plugin_ref;
#define plugin_decl(pi) ((pi)->plugin)
#define plugin_dlib(pi) ((pi)->plugin_dl)
#define plugin_data(pi,cast) ((cast)((pi)->data))
#define plugin_name(pi) (&((pi)->name))
#define plugin_state(pi) ((pi)->state)
#define plugin_equals(p1,p2) ((p1) == (p2))
#else
typedef struct st_plugin_int **plugin_ref;
#define plugin_decl(pi) ((pi)[0]->plugin)
#define plugin_dlib(pi) ((pi)[0]->plugin_dl)
#define plugin_data(pi,cast) ((cast)((pi)[0]->data))
#define plugin_name(pi) (&((pi)[0]->name))
#define plugin_state(pi) ((pi)[0]->state)
#define plugin_equals(p1,p2) ((p1) && (p2) && (p1)[0] == (p2)[0])
#endif
typedef int (*plugin_type_init)(struct st_plugin_int *);
extern char *opt_plugin_load;
extern char *opt_plugin_dir_ptr;
extern char opt_plugin_dir[FN_REFLEN];
extern const LEX_STRING plugin_type_names[];
extern int plugin_init(int *argc, char **argv, int init_flags);
extern void plugin_shutdown(void);
void add_plugin_options(DYNAMIC_ARRAY *options, MEM_ROOT *mem_root);
extern bool plugin_is_ready(const LEX_STRING *name, int type);
#define my_plugin_lock_by_name(A,B,C) plugin_lock_by_name(A,B,C)
#define my_plugin_lock_by_name_ci(A,B,C) plugin_lock_by_name(A,B,C)
#define my_plugin_lock(A,B) plugin_lock(A,B)
#define my_plugin_lock_ci(A,B) plugin_lock(A,B)
extern plugin_ref plugin_lock(THD *thd, plugin_ref *ptr);
extern plugin_ref plugin_lock_by_name(THD *thd, const LEX_STRING *name,
int type);
extern void plugin_unlock(THD *thd, plugin_ref plugin);
extern void plugin_unlock_list(THD *thd, plugin_ref *list, uint count);
extern bool mysql_install_plugin(THD *thd, const LEX_STRING *name,
const LEX_STRING *dl);
extern bool mysql_uninstall_plugin(THD *thd, const LEX_STRING *name);
extern bool plugin_register_builtin(struct st_mysql_plugin *plugin);
extern void plugin_thdvar_init(THD *thd);
extern void plugin_thdvar_cleanup(THD *thd);
extern SHOW_COMP_OPTION plugin_status(const char *name, int len, size_t type);
typedef my_bool (plugin_foreach_func)(THD *thd,
plugin_ref plugin,
void *arg);
#define plugin_foreach(A,B,C,D) plugin_foreach_with_mask(A,B,C,PLUGIN_IS_READY,D)
extern bool plugin_foreach_with_mask(THD *thd, plugin_foreach_func *func,
int type, uint state_mask, void *arg);
#endif
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