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/******************************************************
The transaction
(c) 1996 Innobase Oy
Created 3/26/1996 Heikki Tuuri
*******************************************************/
/*****************************************************************
Starts the transaction if it is not yet started. */
UNIV_INLINE
void
trx_start_if_not_started(
/*=====================*/
trx_t* trx) /* in: transaction */
{
ut_ad(trx->conc_state != TRX_COMMITTED_IN_MEMORY);
if (trx->conc_state == TRX_NOT_STARTED) {
trx_start(trx, ULINT_UNDEFINED);
}
}
/*****************************************************************
Starts the transaction if it is not yet started. Assumes we have reserved
the kernel mutex! */
UNIV_INLINE
void
trx_start_if_not_started_low(
/*=========================*/
trx_t* trx) /* in: transaction */
{
ut_ad(trx->conc_state != TRX_COMMITTED_IN_MEMORY);
if (trx->conc_state == TRX_NOT_STARTED) {
trx_start_low(trx, ULINT_UNDEFINED);
}
}
/*****************************************************************
Resets the new record lock info in a transaction struct. */
UNIV_INLINE
void
trx_reset_new_rec_lock_info(
/*========================*/
trx_t* trx) /* in: transaction struct */
{
trx->new_rec_locks[0] = NULL;
trx->new_rec_locks[1] = NULL;
}
/*****************************************************************
Registers that we have set a new record lock on an index. We only have space
to store 2 indexes! If this is called to store more than 2 indexes after
trx_reset_new_rec_lock_info(), then this function does nothing. */
UNIV_INLINE
void
trx_register_new_rec_lock(
/*======================*/
trx_t* trx, /* in: transaction struct */
dict_index_t* index) /* in: trx sets a new record lock on this
index */
{
if (trx->new_rec_locks[0] == NULL) {
trx->new_rec_locks[0] = index;
return;
}
if (trx->new_rec_locks[0] == index) {
return;
}
if (trx->new_rec_locks[1] != NULL) {
return;
}
trx->new_rec_locks[1] = index;
}
/*****************************************************************
Checks if trx has set a new record lock on an index. */
UNIV_INLINE
ibool
trx_new_rec_locks_contain(
/*======================*/
/* out: TRUE if trx has set a new record lock
on index */
trx_t* trx, /* in: transaction struct */
dict_index_t* index) /* in: index */
{
return(trx->new_rec_locks[0] == index
|| trx->new_rec_locks[1] == index);
}
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