mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 12:02:42 +01:00
5a759d31f7
Benefits of this patch: - Removed a lot of calls to strlen(), especially for field_string - Strings generated by parser are now const strings, less chance of accidently changing a string - Removed a lot of calls with LEX_STRING as parameter (changed to pointer) - More uniform code - Item::name_length was not kept up to date. Now fixed - Several bugs found and fixed (Access to null pointers, access of freed memory, wrong arguments to printf like functions) - Removed a lot of casts from (const char*) to (char*) Changes: - This caused some ABI changes - lex_string_set now uses LEX_CSTRING - Some fucntions are now taking const char* instead of char* - Create_field::change and after changed to LEX_CSTRING - handler::connect_string, comment and engine_name() changed to LEX_CSTRING - Checked printf() related calls to find bugs. Found and fixed several errors in old code. - A lot of changes from LEX_STRING to LEX_CSTRING, especially related to parsing and events. - Some changes from LEX_STRING and LEX_STRING & to LEX_CSTRING* - Some changes for char* to const char* - Added printf argument checking for my_snprintf() - Introduced null_clex_str, star_clex_string, temp_lex_str to simplify code - Added item_empty_name and item_used_name to be able to distingush between items that was given an empty name and items that was not given a name This is used in sql_yacc.yy to know when to give an item a name. - select table_name."*' is not anymore same as table_name.* - removed not used function Item::rename() - Added comparision of item->name_length before some calls to my_strcasecmp() to speed up comparison - Moved Item_sp_variable::make_field() from item.h to item.cc - Some minimal code changes to avoid copying to const char * - Fixed wrong error message in wsrep_mysql_parse() - Fixed wrong code in find_field_in_natural_join() where real_item() was set when it shouldn't - ER_ERROR_ON_RENAME was used with extra arguments. - Removed some (wrong) ER_OUTOFMEMORY, as alloc_root will already give the error. TODO: - Check possible unsafe casts in plugin/auth_examples/qa_auth_interface.c - Change code to not modify LEX_CSTRING for database name (as part of lower_case_table_names)
135 lines
3.4 KiB
C++
135 lines
3.4 KiB
C++
#ifndef _EVENT_QUEUE_H_
|
|
#define _EVENT_QUEUE_H_
|
|
/* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
|
|
|
|
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,
|
|
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
|
|
|
|
/**
|
|
|
|
@addtogroup Event_Scheduler
|
|
@{
|
|
|
|
@file event_queue.h
|
|
|
|
Queue of events awaiting execution.
|
|
*/
|
|
|
|
#ifdef HAVE_PSI_INTERFACE
|
|
extern PSI_mutex_key key_LOCK_event_queue;
|
|
extern PSI_cond_key key_COND_queue_state;
|
|
#endif /* HAVE_PSI_INTERFACE */
|
|
|
|
#include "queues.h" // QUEUE
|
|
#include "sql_string.h" /* LEX_CSTRING */
|
|
#include "my_time.h" /* my_time_t, interval_type */
|
|
|
|
class Event_basic;
|
|
class Event_queue_element;
|
|
class Event_queue_element_for_exec;
|
|
|
|
class THD;
|
|
|
|
/**
|
|
Queue of active events awaiting execution.
|
|
*/
|
|
|
|
class Event_queue
|
|
{
|
|
public:
|
|
Event_queue();
|
|
~Event_queue();
|
|
|
|
bool
|
|
init_queue(THD *thd);
|
|
|
|
/* Methods for queue management follow */
|
|
|
|
bool
|
|
create_event(THD *thd, Event_queue_element *new_element,
|
|
bool *created);
|
|
|
|
void
|
|
update_event(THD *thd, const LEX_CSTRING *dbname, const LEX_CSTRING *name,
|
|
Event_queue_element *new_element);
|
|
|
|
void
|
|
drop_event(THD *thd, const LEX_CSTRING *dbname, const LEX_CSTRING *name);
|
|
|
|
void
|
|
drop_schema_events(THD *thd, const LEX_CSTRING *schema);
|
|
|
|
void
|
|
recalculate_activation_times(THD *thd);
|
|
|
|
bool
|
|
get_top_for_execution_if_time(THD *thd,
|
|
Event_queue_element_for_exec **event_name);
|
|
|
|
|
|
void
|
|
dump_internal_status();
|
|
|
|
private:
|
|
void
|
|
empty_queue();
|
|
|
|
void
|
|
deinit_queue();
|
|
/* helper functions for working with mutexes & conditionals */
|
|
void
|
|
lock_data(const char *func, uint line);
|
|
|
|
void
|
|
unlock_data(const char *func, uint line);
|
|
|
|
void
|
|
cond_wait(THD *thd, struct timespec *abstime, const PSI_stage_info *stage,
|
|
const char *src_func, const char *src_file, uint src_line);
|
|
|
|
void
|
|
find_n_remove_event(const LEX_CSTRING *db, const LEX_CSTRING *name);
|
|
|
|
|
|
void
|
|
drop_matching_events(THD *thd, const LEX_CSTRING *pattern,
|
|
bool (*)(const LEX_CSTRING*, Event_basic *));
|
|
|
|
|
|
void
|
|
dbug_dump_queue(my_time_t now);
|
|
|
|
/* LOCK_event_queue is the mutex which protects the access to the queue. */
|
|
mysql_mutex_t LOCK_event_queue;
|
|
mysql_cond_t COND_queue_state;
|
|
|
|
/* The sorted queue with the Event_queue_element objects */
|
|
QUEUE queue;
|
|
|
|
my_time_t next_activation_at;
|
|
|
|
uint mutex_last_locked_at_line;
|
|
uint mutex_last_unlocked_at_line;
|
|
uint mutex_last_attempted_lock_at_line;
|
|
const char* mutex_last_locked_in_func;
|
|
const char* mutex_last_unlocked_in_func;
|
|
const char* mutex_last_attempted_lock_in_func;
|
|
bool mutex_queue_data_locked;
|
|
bool mutex_queue_data_attempting_lock;
|
|
bool waiting_on_cond;
|
|
};
|
|
/**
|
|
@} (End of group Event_Scheduler)
|
|
*/
|
|
|
|
#endif /* _EVENT_QUEUE_H_ */
|