public Boolean TryAcquireLock()
{
if (!LockHelper.LockExists(Path))
{
return(AcquireLock());
}
FileLockContent content = LockHelper.ReadLock(Path);
//Someone else owns the lock
if (content.GetType() == typeof(OtherProcessOwnsFileLockContent))
{
return(false);
}
//the file no longer exists
if (content.GetType() == typeof(MissingFileLockContent))
{
return(AcquireLock());
}
DateTime writeTime = new DateTime(content.Timestamp);
//This lock belongs to this process - we can reacquire the lock
if (content.PID == Process.GetCurrentProcess().Id)
{
return(AcquireLock());
}
//The lock has not timed out - we can't acquire it
return(Math.Abs((DateTime.Now - writeTime).TotalSeconds) > Timeout.TotalSeconds && AcquireLock());
}
public Boolean ReleaseLock()
{
//Need to own the lock in order to release it (and we can reacquire the lock inside the current process)
if (LockHelper.LockExists(Path) && TryAcquireLock())
{
LockHelper.DeleteLock(Path);
}
return(true);
}