Edit File: sql_plugin.h
/* Copyright (c) 2005, 2012, Oracle and/or its affiliates. Copyright (c) 2009, 2017, MariaDB Corporation. 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 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_HAVE, SHOW_MY_BOOL, SHOW_HA_ROWS, SHOW_SYS, \ SHOW_LONG_NOFLUSH, SHOW_LEX_STRING, \ /* SHOW_*_STATUS must be at the end, SHOW_LONG_STATUS being first */ \ SHOW_LONG_STATUS, SHOW_DOUBLE_STATUS, SHOW_LONGLONG_STATUS, \ SHOW_UINT32_STATUS #include <my_global.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}; enum enum_plugin_load_option { PLUGIN_OFF, PLUGIN_ON, PLUGIN_FORCE, PLUGIN_FORCE_PLUS_PERMANENT }; extern const char *global_plugin_typelib_names[]; extern volatile int global_plugin_version; extern ulong dlopen_count; #include <my_sys.h> #include "sql_list.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 1U #define PLUGIN_INIT_SKIP_PLUGIN_TABLE 2U #define PLUGIN_INIT_SKIP_INITIALIZATION 4U #define INITIAL_LEX_PLUGIN_LIST_SIZE 16 typedef enum enum_mysql_show_type SHOW_TYPE; typedef struct st_mysql_show_var SHOW_VAR; #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 1U #define PLUGIN_IS_DELETED 2U #define PLUGIN_IS_UNINITIALIZED 4U #define PLUGIN_IS_READY 8U #define PLUGIN_IS_DYING 16U #define PLUGIN_IS_DISABLED 32U struct st_ptr_backup { void **ptr; void *value; void save(void **p) { ptr= p; value= *p; } void save(const char **p) { save((void**)p); } void restore() { *ptr= value; } }; /* A handle for the dynamic library containing a plugin or plugins. */ struct st_plugin_dl { LEX_CSTRING dl; void *handle; struct st_maria_plugin *plugins; st_ptr_backup *ptr_backup; uint nbackups; uint ref_count; /* number of plugins loaded from the library */ int mysqlversion; int mariaversion; bool allocated; }; /* A handle of a plugin */ struct st_plugin_int { LEX_CSTRING name; struct st_maria_plugin *plugin; struct st_plugin_dl *plugin_dl; st_ptr_backup *ptr_backup; uint nbackups; uint state; uint ref_count; /* number of threads using the plugin */ uint locks_total; /* how many times the plugin was locked */ 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 */ enum enum_plugin_load_option load_option; /* OFF, ON, FORCE, F+PERMANENT */ }; extern mysql_mutex_t LOCK_plugin; /* 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_ref_to_int(A) A #define plugin_int_to_ref(A) A #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_load_option(pi) ((pi)->load_option) #define plugin_equals(p1,p2) ((p1) == (p2)) #else typedef struct st_plugin_int **plugin_ref; #define plugin_ref_to_int(A) (A ? A[0] : NULL) #define plugin_int_to_ref(A) &(A) #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_load_option(pi) ((pi)[0]->load_option) #define plugin_equals(p1,p2) ((p1) && (p2) && (p1)[0] == (p2)[0]) #endif typedef int (*plugin_type_init)(struct st_plugin_int *); extern I_List<i_string> *opt_plugin_load_list_ptr; extern char *opt_plugin_dir_ptr; extern MYSQL_PLUGIN_IMPORT char opt_plugin_dir[FN_REFLEN]; extern const LEX_CSTRING plugin_type_names[]; extern ulong plugin_maturity; extern TYPELIB plugin_maturity_values; extern const char *plugin_maturity_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_CSTRING *name, int type); #define my_plugin_lock_by_name(A,B,C) plugin_lock_by_name(A,B,C) #define my_plugin_lock(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_CSTRING *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_CSTRING *name, const LEX_CSTRING *dl); extern bool mysql_uninstall_plugin(THD *thd, const LEX_CSTRING *name, const LEX_CSTRING *dl); extern bool plugin_register_builtin(struct st_mysql_plugin *plugin); extern void plugin_thdvar_init(THD *thd); extern void plugin_thdvar_cleanup(THD *thd); sys_var *find_plugin_sysvar(st_plugin_int *plugin, st_mysql_sys_var *var); void plugin_opt_set_limits(struct my_option *, const struct st_mysql_sys_var *); extern SHOW_COMP_OPTION plugin_status(const char *name, size_t len, int type); extern bool check_valid_path(const char *path, size_t length); extern void plugin_mutex_init(); 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); extern void sync_dynamic_session_variables(THD* thd, bool global_lock); extern bool plugin_dl_foreach(THD *thd, const LEX_CSTRING *dl, plugin_foreach_func *func, void *arg); extern void sync_dynamic_session_variables(THD* thd, bool global_lock); #endif #ifdef WITH_WSREP extern void wsrep_plugins_pre_init(); extern void wsrep_plugins_post_init(); #endif /* WITH_WSREP */