/// <summary>
/// Check Downloaders and start downloading.
/// </summary>
private static void CheckDownloaders()
{
// No limit
if (MaxDownload == 0)
{
return;
}
DownloadersMutex.WaitOne();
// Check downloaders
List <Downloader> startingDownloaders = new List <Downloader>();
for (int i = 0; i < Math.Min(Downloaders.Count, MaxDownload); ++i)
{
Downloader downloader = Downloaders[i];
if (!downloader.IsActive && !downloader.IsFinished)
{
startingDownloaders.Add(downloader);
}
}
DownloadersMutex.ReleaseMutex();
// Start downloading
foreach (Downloader downloader in startingDownloaders)
{
downloader.DownloadAsync();
}
}
/// <summary>
/// Add a Downloader to Downloaders.
/// </summary>
/// <param name="downloader">The Downloader which is going to be added</param>
/// <param name="handler">Handler for DownloadSucceeded event</param>
/// <returns></returns>
public static bool AddDownloader(Downloader downloader, DownloadCompletedEventHandler handler)
{
DownloadersMutex.WaitOne();
// Clean up finished downloader
int removedCount = Downloaders.RemoveAll(p => p.IsFinished);
// Add downloader
foreach (Downloader d in Downloaders)
{
if (d.To == downloader.To)
{
d.DownloadSucceeded += handler;
DownloadersMutex.ReleaseMutex();
return(false);
}
}
downloader.DownloadCompleted += new DownloadCompletedEventHandler(() =>
{
RemoveDownloader(downloader);
});
downloader.DownloadSucceeded += handler;
// Add to downloaders
Downloaders.Add(downloader);
DownloadersMutex.ReleaseMutex();
// Start downloading if no limit
if (MaxDownload == 0)
{
downloader.DownloadAsync();
}
// Check downloaders
CheckDownloaders();
return(true);
}