public Page WaitPage(int pageno, ForegroundWorker bgw)
{
try
{
if (!wl.TestAndSet())
{
try
{
if (!archivedPages.IsPageArchived(pageno))
{
var s = new BGWSerializer(bgw);
var k = s.GetKey();
var ret = SavePage(pageno, new WrapBGW(s, k));
s.Commit(k);
if (!ret)
return null;
}
}
catch
{
throw;
}
finally
{
wl.StopRunning();
}
}
else if (!archivedPages.IsPageArchived(pageno))
{
archivedPages.Request(pageno);
do
{
System.Threading.Thread.Sleep(1000);
if (archivedPages.Failed())
return null;
} while (!archivedPages.IsPageArchived(pageno));
}
return GetPage(pageno, Parser.Is2x(pageno));
}
catch
{
return null;
}
}
public void ResumeWork(ForegroundWorker bgw2, int startPage, int lastPage)
{
var bgw = new BGWSerializer(bgw2);
while (wl.TestAndSet()) { System.Threading.Thread.Sleep(1000); }
try
{
bool missedRound = false;
startPage = ValidRange(startPage);
int pagesToParse = lastPage - startPage + 1;
int currentPage = archivedPages.FindLowestPage(startPage, lastPage);;
var manager = new Writer.PageSavesManager(archivedPages.GetParseCount(startPage, lastPage), bgw2);
if (currentPage > lastPage)
{
bgw2.ReportProgress(100, "Range already archived!");
return;
}
manager.CurrentProgress = (int)(((float)(manager.PagesParsed) / (float)(pagesToParse)) * 100.0f);
if (!bgw2.CancellationPending)
{
bgw2.ReportProgress(manager.CurrentProgress, "Starting archive operation at page " + startPage);
}
else
{
bgw2.ReportProgress(manager.CurrentProgress, "Operation cancelled.");
return;
}
while (true)
{
if (missedRound)
{
currentPage = manager.MissedPagesTop();
manager.CurrentProgress = (int)(((float)(manager.PagesParsed) / (float)(pagesToParse)) * 100.0f);
}
if (!bgw2.CancellationPending)
{
if (currentPage != startPage)
bgw2.ReportProgress(manager.CurrentProgress, "Resuming from " + currentPage);
}
else
{
bgw2.ReportProgress(manager.CurrentProgress, "Operation cancelled.");
return;
}
while (true)
{
UInt64 k = bgw.GetKey();
manager.ExpectWorker();
System.Threading.ThreadPool.QueueUserWorkItem(LaunchThreadedSave, new ThreadedSaveParams { Request = false, BGW = bgw, BGWKey = k, CurrentPage = currentPage, Manager = manager, PagesToParse = pagesToParse });
if (missedRound)
{
if (manager.MissedPagesCount() == 0)
break;
currentPage = manager.MissedPagesPop();
}
else
{
if (currentPage >= lastPage)
break;
currentPage = ValidRange(archivedPages.FindLowestPage(currentPage + 1, lastPage));
}
}
while (!manager.WaitForWorkers() && !bgw2.CancellationPending)
{
Thread.Sleep(1); //since we run alongside the threadpool we have to be quick about things
var req = (archivedPages.GetRequest());
if (req != 0)
{
UInt64 k = bgw.GetKey();
bgw.ReportProgress(k, manager.CurrentProgress, "Responding to user request for page " + req);
LaunchThreadedSave(new ThreadedSaveParams { Request = true, BGW = bgw, BGWKey = k, CurrentPage = req, Manager = manager, PagesToParse = pagesToParse });
if(!archivedPages.IsPageArchived(req))
archivedPages.FailFlag();
}
}
while (!manager.WaitForWorkers()) { Thread.Sleep(1); }
if (bgw2.CancellationPending || manager.MissedPagesCount() == 0)
break;
missedRound = true;
bgw2.ReportProgress(manager.CurrentProgress, "Missed " + manager.MissedPagesCount() + " pages. Iterating through missed queue.");
}
if (bgw2.CancellationPending)
bgw2.ReportProgress(manager.CurrentProgress, "Operation cancelled.");
else
bgw2.ReportProgress(100, "Operation completed.");
}
catch
{
throw;
}
finally
{
wl.StopRunning();
}
}