/**********************************************************************//**
Does the transaction commit for MySQL.
@return DB_SUCCESS or error number */
UNIV_INTERN
ulint
trx_commit_for_mysql(
/*=================*/
trx_t* trx) /*!< in: trx handle */
{
/* Because we do not do the commit by sending an Innobase
sig to the transaction, we must here make sure that trx has been
started. */
ut_a(trx);
trx_start_if_not_started(trx);
trx->op_info = "committing";
mutex_enter(&kernel_mutex);
trx_commit_off_kernel(trx);
mutex_exit(&kernel_mutex);
trx->op_info = "";
return(DB_SUCCESS);
}
ulint
trx_commit_for_mysql(
/*=================*/
/* out: 0 or error number */
trx_t* trx) /* in: trx handle */
{
/* Because we do not do the commit by sending an Innobase
sig to the transaction, we must here make sure that trx has been
started. */
ut_a(trx);
trx->op_info = "committing";
/* If we are doing the XA recovery of prepared transactions, then
the transaction object does not have an InnoDB session object, and we
set the dummy session that we use for all MySQL transactions. */
if (trx->sess == NULL) {
/* Open a dummy session */
if (!trx_dummy_sess) {
mutex_enter(&kernel_mutex);
if (!trx_dummy_sess) {
trx_dummy_sess = sess_open();
}
mutex_exit(&kernel_mutex);
}
trx->sess = trx_dummy_sess;
}
trx_start_if_not_started(trx);
mutex_enter(&kernel_mutex);
trx_commit_off_kernel(trx);
mutex_exit(&kernel_mutex);
trx->op_info = "";
return(0);
}
/****************************************************************//**
Commits a transaction. NOTE that the kernel mutex is temporarily released. */
static
void
trx_handle_commit_sig_off_kernel(
/*=============================*/
trx_t* trx, /*!< in: transaction */
que_thr_t** next_thr) /*!< in/out: next query thread to run;
if the value which is passed in is
a pointer to a NULL pointer, then the
calling function can start running
a new query thread */
{
trx_sig_t* sig;
trx_sig_t* next_sig;
ut_ad(mutex_own(&kernel_mutex));
trx->que_state = TRX_QUE_COMMITTING;
trx_commit_off_kernel(trx);
ut_ad(UT_LIST_GET_LEN(trx->wait_thrs) == 0);
/* Remove all TRX_SIG_COMMIT signals from the signal queue and send
reply messages to them */
sig = UT_LIST_GET_FIRST(trx->signals);
while (sig != NULL) {
next_sig = UT_LIST_GET_NEXT(signals, sig);
if (sig->type == TRX_SIG_COMMIT) {
trx_sig_reply(sig, next_thr);
trx_sig_remove(trx, sig);
}
sig = next_sig;
}
trx->que_state = TRX_QUE_RUNNING;
}
