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global read lock code now uses a dedicated mutex

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(otherwise a deadlock when ALTER writes to
binlog holding LOCK_open, it causes binlog rotation,
binlog waits for prepared transactions to commit, and commit
needs LOCK_open to check for global read lock)
This commit is contained in:
serg@serg.mylan
2005-03-16 08:40:19 +01:00
parent ed9c9732c9
commit d7b2d4c541
6 changed files with 31 additions and 30 deletions
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sql/mysql_priv.h
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@ -1099,7 +1099,7 @@ extern pthread_mutex_t LOCK_mysql_create_db,LOCK_Acl,LOCK_open,
LOCK_thread_count,LOCK_mapped_file,LOCK_user_locks, LOCK_status,
LOCK_error_log, LOCK_delayed_insert, LOCK_uuid_generator,
LOCK_delayed_status, LOCK_delayed_create, LOCK_crypt, LOCK_timezone,
LOCK_slave_list, LOCK_active_mi, LOCK_manager,
LOCK_slave_list, LOCK_active_mi, LOCK_manager, LOCK_global_read_lock,
LOCK_global_system_variables, LOCK_user_conn;
extern rw_lock_t LOCK_grant, LOCK_sys_init_connect, LOCK_sys_init_slave;
extern pthread_cond_t COND_refresh, COND_thread_count, COND_manager;