Module txn

bool box_txn(void)¶

Return true if there is an active transaction.

int box_txn_begin(void)¶

Begin a transaction in the current fiber.

A transaction is attached to caller fiber, therefore one fiber can have only one active transaction. See also box.begin().

Returns:	0 on success
Returns:	-1 on error. Perhaps a transaction has already been started.

int box_txn_commit(void)¶

Commit the current transaction. See also box.commit().

Returns:	0 on success
Returns:	-1 on error. Perhaps a disk write failure

void box_txn_rollback(void)¶

Roll back the current transaction. See also box.rollback().

box_txn_savepoint_t *savepoint(void)¶

Return a descriptor of a savepoint.

void box_txn_rollback_to_savepoint(box_txn_savepoint_t *savepoint)¶

Roll back the current transaction as far as the specified savepoint.

void *box_txn_alloc(size_t size)¶

Allocate memory on txn memory pool.

The memory is automatically deallocated when the transaction is committed or rolled back.

Returns:	NULL on out of memory