//NB: initially, you could have multiple blooms, if they were different projects.
//however, then we switched to the embedded http image server, which can't share
//a port. So we could fix that (get different ports), but for now, I'm just going
//to lock it down to a single bloom
private static bool GrabTokenForThisProject(string pathToProject)
{
//ok, here's how this complex method works...
//First, we try to get the mutex quickly and quitely.
//If that fails, we put up a dialog and wait a number of seconds,
//while we wait for the mutex to come free.
string mutexId = "bloom";
// string mutexId = pathToProject;
// mutexId = mutexId.Replace(Path.DirectorySeparatorChar, '-');
// mutexId = mutexId.Replace(Path.VolumeSeparatorChar, '-');
bool mutexAcquired = false;
try
{
_oneInstancePerProjectMutex = Mutex.OpenExisting(mutexId);
mutexAcquired = _oneInstancePerProjectMutex.WaitOne(TimeSpan.FromMilliseconds(1 * 1000), false);
}
catch (WaitHandleCannotBeOpenedException e)//doesn't exist, we're the first.
{
_oneInstancePerProjectMutex = new Mutex(true, mutexId, out mutexAcquired);
mutexAcquired = true;
}
catch (AbandonedMutexException e)
{
//that's ok, we'll get it below
}
using (var dlg = new SimpleMessageDialog("Waiting for other Bloom to finish..."))
{
dlg.TopMost = true;
dlg.Show();
try
{
_oneInstancePerProjectMutex = Mutex.OpenExisting(mutexId);
mutexAcquired = _oneInstancePerProjectMutex.WaitOne(TimeSpan.FromMilliseconds(10 * 1000), false);
}
catch (AbandonedMutexException e)
{
_oneInstancePerProjectMutex = new Mutex(true, mutexId, out mutexAcquired);
mutexAcquired = true;
}
catch (Exception e)
{
ErrorReport.NotifyUserOfProblem(e,
"There was a problem starting Bloom which might require that you restart your computer.");
}
}
if (!mutexAcquired) // cannot acquire?
{
_oneInstancePerProjectMutex = null;
ErrorReport.NotifyUserOfProblem("Another copy of Bloom is already open with " + pathToProject + ". If you cannot find that Bloom, restart your computer.");
return false;
}
return true;
}
