164 lines
3.8 KiB
Objective-C
164 lines
3.8 KiB
Objective-C
/* Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
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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; version 2 of the License.
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef SQL_PLUGIN_REF_INCLUDED
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#define SQL_PLUGIN_REF_INCLUDED
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#include "my_alloc.h"
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#include "mysql/mysql_lex_string.h"
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#include "prealloced_array.h"
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typedef struct st_mysql_lex_string LEX_STRING;
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class sys_var;
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struct st_mysql_plugin;
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struct st_plugin_dl;
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enum enum_plugin_load_option {
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PLUGIN_OFF,
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PLUGIN_ON,
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PLUGIN_FORCE,
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PLUGIN_FORCE_PLUS_PERMANENT
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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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st_mysql_plugin *plugin;
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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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MEM_ROOT mem_root; /* memory for dynamic plugin structures */
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sys_var *system_vars; /* server variables for this plugin */
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enum_plugin_load_option load_option; /* OFF, ON, FORCE, F+PERMANENT */
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};
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/*
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See intern_plugin_lock() for the explanation for the
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conditionally defined plugin_ref type
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*/
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#ifdef DBUG_OFF
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typedef struct st_plugin_int *plugin_ref;
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inline st_mysql_plugin *plugin_decl(st_plugin_int *ref)
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{
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return ref->plugin;
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}
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inline st_plugin_dl *plugin_dlib(st_plugin_int *ref)
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{
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return ref->plugin_dl;
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}
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template<typename T>
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inline T plugin_data(st_plugin_int *ref)
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{
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return static_cast<T>(ref->data);
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}
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inline LEX_STRING *plugin_name(st_plugin_int *ref)
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{
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return &(ref->name);
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}
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inline uint plugin_state(st_plugin_int *ref)
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{
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return ref->state;
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}
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inline enum_plugin_load_option plugin_load_option(st_plugin_int *ref)
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{
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return ref->load_option;
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}
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inline bool plugin_equals(st_plugin_int *ref1, st_plugin_int *ref2)
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{
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return ref1 == ref2;
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}
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#else
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typedef struct st_plugin_int **plugin_ref;
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inline st_mysql_plugin *plugin_decl(st_plugin_int **ref)
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{
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return ref[0]->plugin;
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}
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inline st_plugin_dl *plugin_dlib(st_plugin_int **ref)
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{
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return ref[0]->plugin_dl;
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}
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template<typename T>
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inline T plugin_data(st_plugin_int **ref)
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{
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return static_cast<T>(ref[0]->data);
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}
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inline LEX_STRING *plugin_name(st_plugin_int **ref)
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{
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return &(ref[0]->name);
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}
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inline uint plugin_state(st_plugin_int **ref)
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{
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return ref[0]->state;
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}
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inline enum_plugin_load_option plugin_load_option(st_plugin_int **ref)
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{
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return ref[0]->load_option;
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}
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inline bool plugin_equals(st_plugin_int **ref1, st_plugin_int **ref2)
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{
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return ref1 && ref2 && (ref1[0] == ref2[0]);
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}
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#endif
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/**
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@class Plugin_array
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@brief Plugin array helper class.
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*/
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class Plugin_array : public Prealloced_array<plugin_ref, 2>
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{
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public:
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/**
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Class construction.
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@param psi_key PSI key.
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*/
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explicit Plugin_array(PSI_memory_key psi_key) :
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Prealloced_array<plugin_ref, 2>(psi_key)
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{
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}
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/**
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Check, whether the plugin specified by the plugin argument has been
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already added into the array.
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@param plugin Plugin to check.
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@retval true Plugin has been already added.
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@retval false There is no plugin in the array.
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*/
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bool exists(plugin_ref plugin)
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{
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Plugin_array::iterator i;
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for (i= begin(); i != end(); ++i)
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if (plugin_equals(*i, plugin))
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return true;
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return false;
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}
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};
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#endif // SQL_PLUGIN_REF_INCLUDED
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