Ejemplos de log_write_low en C++ (Cpp)

Ejemplo n.º 1

Archivo: mtr0mtr.c Proyecto: pombredanne/mysql-1

/************************************************************//**
Writes the contents of a mini-transaction log, if any, to the database log. */
static
void
mtr_log_reserve_and_write(
/*======================*/
	mtr_t*	mtr)	/*!< in: mtr */
{
	dyn_array_t*	mlog;
	dyn_block_t*	block;
	ulint		data_size;
	ibool		success;
	byte*		first_data;

	ut_ad(mtr);

	mlog = &(mtr->log);

	first_data = dyn_block_get_data(mlog);

	if (mtr->n_log_recs > 1) {
		mlog_catenate_ulint(mtr, MLOG_MULTI_REC_END, MLOG_1BYTE);
	} else {
		*first_data = (byte)((ulint)*first_data
				     | MLOG_SINGLE_REC_FLAG);
	}

	if (mlog->heap == NULL) {
		mtr->end_lsn = log_reserve_and_write_fast(
			first_data, dyn_block_get_used(mlog),
			&(mtr->start_lsn), &success);
		if (success) {

			return;
		}
	}

	data_size = dyn_array_get_data_size(mlog);

	/* Open the database log for log_write_low */
	mtr->start_lsn = log_reserve_and_open(data_size);

	if (mtr->log_mode == MTR_LOG_ALL) {

		block = mlog;

		while (block != NULL) {
			log_write_low(dyn_block_get_data(block),
				      dyn_block_get_used(block));
			block = dyn_array_get_next_block(mlog, block);
		}
	} else {
		ut_ad(mtr->log_mode == MTR_LOG_NONE);
		/* Do nothing */
	}

	mtr->end_lsn = log_close();
}

Ejemplo n.º 2

Archivo: mtr0mtr.c Proyecto: Suker-Xu/david-mysql-tools

/************************************************************//**
Writes the contents of a mini-transaction log, if any, to the database log. */
static
void
mtr_log_reserve_and_write(
/*======================*/
	mtr_t*	mtr)	/*!< in: mtr */
{
	dyn_array_t*	mlog;
	dyn_block_t*	block;
	ulint		data_size;
	byte*		first_data;

	ut_ad(mtr);

	mlog = &(mtr->log);

	first_data = dyn_block_get_data(mlog);

	if (mtr->n_log_recs > 1) {
		mlog_catenate_ulint(mtr, MLOG_MULTI_REC_END, MLOG_1BYTE);
	} else {
		*first_data = (byte)((ulint)*first_data
				     | MLOG_SINGLE_REC_FLAG);
	}

	if (mlog->heap == NULL) {
		mtr->end_lsn = log_reserve_and_write_fast(
			first_data, dyn_block_get_used(mlog),
			&mtr->start_lsn);
		if (mtr->end_lsn) {

			/* Success. We have the log mutex.
			Add pages to flush list and exit */
			goto func_exit;
		}
	}

	data_size = dyn_array_get_data_size(mlog);

	/* Open the database log for log_write_low */
	mtr->start_lsn = log_reserve_and_open(data_size);

	if (mtr->log_mode == MTR_LOG_ALL) {

		block = mlog;

		while (block != NULL) {
			log_write_low(dyn_block_get_data(block),
				      dyn_block_get_used(block));
			block = dyn_array_get_next_block(mlog, block);
		}
	} else {
		ut_ad(mtr->log_mode == MTR_LOG_NONE);
		/* Do nothing */
	}

	mtr->end_lsn = log_close();

func_exit:
	log_flush_order_mutex_enter();

	/* It is now safe to release the log mutex because the
	flush_order mutex will ensure that we are the first one
	to insert into the flush list. */
	log_release();

	if (mtr->modifications) {
		mtr_memo_note_modifications(mtr);
	}

	log_flush_order_mutex_exit();
}