Method page

tx.go:629–642

page returns a reference to the page with a given id. If page has been written to then a temporary buffered page is returned.

(id common.Pgid)

// page returns a reference to the page with a given id.
// If page has been written to then a temporary buffered page is returned.
func (tx *Tx) page(id common.Pgid) *common.Page {
	// Check the dirty pages first.
	if tx.pages != nil {
		if p, ok := tx.pages[id]; ok {
			p.FastCheck(id)
			return p
		}
	}

	// Otherwise return directly from the mmap.
	p := tx.db.page(id)
	p.FastCheck(id)
	return p
}

// forEachPage iterates over every page within a given page and executes a function.
func (tx *Tx) forEachPage(pgidnum common.Pgid, fn func(*common.Page, int, []common.Pgid)) {