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Diffstat (limited to 'externals/mysql/thr_lock.h')
| -rw-r--r-- | externals/mysql/thr_lock.h | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/externals/mysql/thr_lock.h b/externals/mysql/thr_lock.h deleted file mode 100644 index 38f0478f276..00000000000 --- a/externals/mysql/thr_lock.h +++ /dev/null @@ -1,181 +0,0 @@ -/* Copyright 2000-2008 MySQL AB, 2008 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 */ - -/* For use with thr_lock:s */ - -#ifndef _thr_lock_h -#define _thr_lock_h -#ifdef __cplusplus -extern "C" { -#endif - -#include <my_pthread.h> -#include <my_list.h> - -struct st_thr_lock; -extern ulong locks_immediate,locks_waited ; - -/** - Lock types are used to request a lock on a table. Changes in this enumeration - might affect transactional locks as well. - Important: if a new lock type is added, a matching lock description - must be added to sql_test.cc's lock_descriptions array. - @see set_handler_table_locks - @see read_lock_type_for_table -*/ -enum thr_lock_type { TL_IGNORE=-1, - TL_UNLOCK, /* UNLOCK ANY LOCK */ - /* - Parser only! At open_tables() becomes TL_READ or - TL_READ_NO_INSERT depending on the binary log format - (SBR/RBR) and on the table category (log table). - Used for tables that are read by statements which - modify tables. - */ - TL_READ_DEFAULT, - TL_READ, /* Read lock */ - TL_READ_WITH_SHARED_LOCKS, - /* High prior. than TL_WRITE. Allow concurrent insert */ - TL_READ_HIGH_PRIORITY, - /* READ, Don't allow concurrent insert */ - TL_READ_NO_INSERT, - /* - Write lock, but allow other threads to read / write. - Used by BDB tables in MySQL to mark that someone is - reading/writing to the table. - */ - TL_WRITE_ALLOW_WRITE, - /* - Write lock, but allow other threads to read. - Used by ALTER TABLE in MySQL to allow readers - to use the table until ALTER TABLE is finished. - */ - TL_WRITE_ALLOW_READ, - /* - WRITE lock used by concurrent insert. Will allow - READ, if one could use concurrent insert on table. - */ - TL_WRITE_CONCURRENT_INSERT, - /* Write used by INSERT DELAYED. Allows READ locks */ - TL_WRITE_DELAYED, - /* - parser only! Late bound low_priority flag. - At open_tables() becomes thd->update_lock_default. - */ - TL_WRITE_DEFAULT, - /* WRITE lock that has lower priority than TL_READ */ - TL_WRITE_LOW_PRIORITY, - /* Normal WRITE lock */ - TL_WRITE, - /* Abort new lock request with an error */ - TL_WRITE_ONLY}; - -enum enum_thr_lock_result { THR_LOCK_SUCCESS= 0, THR_LOCK_ABORTED= 1, - THR_LOCK_WAIT_TIMEOUT= 2, THR_LOCK_DEADLOCK= 3 }; - - -extern ulong max_write_lock_count; -extern ulong table_lock_wait_timeout; -extern my_bool thr_lock_inited; -extern enum thr_lock_type thr_upgraded_concurrent_insert_lock; - -/* - A description of the thread which owns the lock. The address - of an instance of this structure is used to uniquely identify the thread. -*/ - -typedef struct st_thr_lock_info -{ - pthread_t thread; - my_thread_id thread_id; - ulong n_cursors; -} THR_LOCK_INFO; - -/* - Lock owner identifier. Globally identifies the lock owner within the - thread and among all the threads. The address of an instance of this - structure is used as id. -*/ - -typedef struct st_thr_lock_owner -{ - THR_LOCK_INFO *info; -} THR_LOCK_OWNER; - - -typedef struct st_thr_lock_data { - THR_LOCK_OWNER *owner; - struct st_thr_lock_data *next,**prev; - struct st_thr_lock *lock; - pthread_cond_t *cond; - enum thr_lock_type type; - void *status_param; /* Param to status functions */ - void *debug_print_param; -} THR_LOCK_DATA; - -struct st_lock_list { - THR_LOCK_DATA *data,**last; -}; - -typedef struct st_thr_lock { - LIST list; - pthread_mutex_t mutex; - struct st_lock_list read_wait; - struct st_lock_list read; - struct st_lock_list write_wait; - struct st_lock_list write; - /* write_lock_count is incremented for write locks and reset on read locks */ - ulong write_lock_count; - uint read_no_write_count; - void (*get_status)(void*, my_bool); /* When one gets a lock */ - void (*copy_status)(void*,void*); - void (*update_status)(void*); /* Before release of write */ - void (*restore_status)(void*); /* Before release of read */ - my_bool (*check_status)(void *); - my_bool allow_multiple_concurrent_insert; -} THR_LOCK; - - -extern LIST *thr_lock_thread_list; -extern pthread_mutex_t THR_LOCK_lock; - -my_bool init_thr_lock(void); /* Must be called once/thread */ -#define thr_lock_owner_init(owner, info_arg) (owner)->info= (info_arg) -void thr_lock_info_init(THR_LOCK_INFO *info); -void thr_lock_init(THR_LOCK *lock); -void thr_lock_delete(THR_LOCK *lock); -void thr_lock_data_init(THR_LOCK *lock,THR_LOCK_DATA *data, - void *status_param); -enum enum_thr_lock_result thr_lock(THR_LOCK_DATA *data, - THR_LOCK_OWNER *owner, - enum thr_lock_type lock_type); -void thr_unlock(THR_LOCK_DATA *data); -enum enum_thr_lock_result thr_multi_lock(THR_LOCK_DATA **data, - uint count, THR_LOCK_OWNER *owner); -void thr_multi_unlock(THR_LOCK_DATA **data,uint count); -void -thr_lock_merge_status(THR_LOCK_DATA **data, uint count); -void thr_abort_locks(THR_LOCK *lock, my_bool upgrade_lock); -my_bool thr_abort_locks_for_thread(THR_LOCK *lock, my_thread_id thread); -void thr_print_locks(void); /* For debugging */ -my_bool thr_upgrade_write_delay_lock(THR_LOCK_DATA *data, - enum thr_lock_type new_lock_type); -void thr_downgrade_write_lock(THR_LOCK_DATA *data, - enum thr_lock_type new_lock_type); -my_bool thr_reschedule_write_lock(THR_LOCK_DATA *data); -#ifdef __cplusplus -} -#endif -#endif /* _thr_lock_h */ |