public void LoadPagesOfProcessIntoMemory(Process processWithPagesToLoad)
{
Page[] pagesToLoad = processWithPagesToLoad.PagesOfProcess;
int loadingProcessID = processWithPagesToLoad.ProcessID;
int numOfPagesToLoad = pagesToLoad.Length;
_pageTables.Add(loadingProcessID, new PageTable(numOfPagesToLoad));
PageTable pageTableOfProcess = _pageTables[loadingProcessID];
int i = 0;
while (!_physicalMemory.IsFull && i < numOfPagesToLoad)
{
pageTableOfProcess.ChangeFrameNumberForPageNumber(
pagesToLoad[i].PageNumber, _physicalMemory.InsertPage(pagesToLoad[i]));
_addedPagesInfo.Add(
new PageInfo()
{
ProcessID = loadingProcessID, PageNumber = pagesToLoad[i].PageNumber
});
PageAddedToPhysicalMemoryEvent?.Invoke(loadingProcessID, pagesToLoad[i].PageNumber);
++i;
}
while (i < numOfPagesToLoad)
{
_virtualMemory.InsertPage(pagesToLoad[i++]);
}
processWithPagesToLoad.ProcessFinishedWorkEvent += RemovePages;
}
private void RemovePages(int finishedProcessID)
{
ProcessFinishedWorkEvent?.Invoke(finishedProcessID);
PageTable pageTable = _pageTables[finishedProcessID];
int frameNumber;
for (int i = 0; i < pageTable.NumOfPages; ++i)
{
frameNumber = pageTable.FindFrameNumber(i);
if (frameNumber != -1)
{
_physicalMemory.ExtractPage(frameNumber);
}
else
{
_virtualMemory.ExtractPage(finishedProcessID, i);
}
lock (_object)
{
int j = _addedPagesInfo.FindIndex(pI =>
{
if (pI.ProcessID == finishedProcessID && pI.PageNumber == i)
{
return(true);
}
return(false);
});
if (j != -1)
{
_addedPagesInfo.RemoveAt(j);
}
}
}
_pageTables.Remove(finishedProcessID);
}