发现在 InnoDb 里行锁都是通过调lock_rec_add_to_queue(没有锁冲突) 或者lock_rec_enqueue_waiting(有锁冲突,需要等待其他事务释放锁) 来实现的,于是在这两个函数上下断点,执行一条insert语句,依然没有断下来,说明insert语句没有加任何锁! 到这里我突然想起之前做过的insert加锁的实验,执行insert之后,如果没有任何冲突,
( myQueue );// Copies the Queue elements to the ArrayList at index 1.myAL.InsertRange(1, myQueue );// Displays the ArrayList.Console.WriteLine("After adding the Queue, the ArrayList now contains:"); PrintValues( myAL );// Search for "dog" and add "lazy" before it.myAL.Insert( ...
The macro TAILQ_INSERT_TAIL() inserts the new element elm at the end of the tail queue. The macro TAILQ_INSERT_AFTER() inserts the new element elm after the element listelm. The macro TAILQ_INSERT_BEFORE() inserts the new element elm before the element listelm. The macro TAILQ_REMOVE(...
cbefore_begin Containers library Node handle operators (std::array) operators (std::deque) operators (std::forward_list) operators (std::list) operators (std::map) operators (std::multimap) operators (std::multiset) operators (std::queue) operators (std::set) operators (std::stack) operato...
lock_rec_add_to_queue( type_mode, block, heap_no, index, impl_trx, FALSE); } 首先判断事务是否活跃,然后检查是否已存在排他记录锁,如果事务活跃且不存在锁,则为该事务加上排他记录锁。而本事务的锁是通过lock_rec_convert_impl_to_expl之后的lock_rec_...
KeInsertQueuereturns the previous signal state of the givenQueue. If it was set to zero (that is, not signaled) beforeKeInsertQueuewas called,KeInsertQueuereturns zero, meaning that no entries were queued. If it was nonzero (signaled),KeInsertQueuereturns the number of entries that were queu...
Returns a pointer to the entry that was at the head of the queue before the specified entry was inserted. If the queue was empty, it returns NULL. Remarks Before calling this function, a driver must initialize the variable atListHeadwith theNdisInitializeListHeadfunction and the variable atSpi...
跟代码非常辛苦,我担心是因为我跟丢了某块的逻辑导致没看到加锁,于是我看了看加其他锁的地方,发现在 InnoDb 里行锁都是通过调 lock_rec_add_to_queue(没有锁冲突) 或者 lock_rec_enqueue_waiting(有锁冲突,需要等待其他事务释放锁) 来实现的,于是在这两个函数上下断点,执行一条 insert 语句,依然没有断下来...
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If so, it allows these to execute before continuing. When the handler has no more rows in its queue, the table is unlocked. If no new INSERT DELAYED commands are received within delayed_insert_timeout seconds, the handler terminates. If more than delayed_queue_size rows are pending already...