/*****************************************************************
*
* Constructor takes in a page entry and copies the process id, segment
* and page number over. It sets frame number to 0 by default.
*
****************************************************************/
public MFrame(ProcessPage p)
{
this.frameNumber = 0;
this.processID = p.ProcessID;
this.segment = p.Segment;
this.pageNumber = p.PageNumber;
}
/*********************************************************************
*
* This method loops through the text and data sizes, subtracting one
* page size each time until it reaches 0 bytes left and creates a table
* with each one, making sure to keep track of the page number properly
* by seperating the text segments from the data segments.
*
*********************************************************************/
public void SetPages()
{
int tempText = text;
int tempData = data;
ProcessPage page;
// loop through text segment
while (tempText > 0)
{
// creates a new page
page = new ProcessPage();
tempText -= PAGE_SIZE;
// if its not the first page, add one to the previous page number
if (pages.Count > 0)
{
int last = pages[pages.Count - 1].PageNumber;
page.PageNumber = last + 1;
}
page.ProcessID = processID;
page.Segment = "Text";
// add to list of pages
pages.Add(page);
}
// loop through data segment
while (tempData > 0)
{
// create new page
page = new ProcessPage();
tempData -= PAGE_SIZE;
// if it is not the first data page then add one to the previous page number
if (pages.Count > 0 && !pages.Last().Segment.Equals("Text"))
{
int last = pages[pages.Count - 1].PageNumber;
page.PageNumber = last + 1;
}
page.ProcessID = processID;
page.Segment = "Data";
// add to list of pages
pages.Add(page);
}
}
