remove unused threader class

git-svn-id: https://linkchecker.svn.sourceforge.net/svnroot/linkchecker/trunk/linkchecker@3182 e7d03fd6-7b0d-0410-9947-9c21f3af8025

linkcheck/threader.py

@@ -71,78 +71,3 @@ def set_thread_priority (prio):
         res = None
     return res
 
-
-class Threader (object):
-    """
-    A thread generating class. Note that since Python has no ability to
-    stop threads from outside, one has to make sure threads poll
-    regularly for outside variables to stop them. Or one makes sure
-    threads surely will terminate in finite time.
-    """
-
-    def __init__ (self, num=5):
-        """
-        Store maximum number of threads to generate, and initialize
-        an empty thread list.
-        """
-        # this allows negative numbers
-        self.threads_max = max(num, 0)
-        # list of active threads to watch
-        self.threads = []
-
-    def _acquire (self):
-        """
-        Wait until we are allowed to start a new thread.
-        """
-        while self.active_threads() >= self.threads_max:
-            self._reduce_threads()
-            time.sleep(0.1)
-
-    def _reduce_threads (self):
-        """
-        Remove inactive threads.
-        """
-        self.threads = [ t for t in self.threads if t.isAlive() ]
-
-    def active_threads (self):
-        """
-        Return number of active threads.
-        """
-        return len(self.threads)
-
-    def finished (self):
-        """
-        Return True if no active threads are left.
-        """
-        if self.threads_max > 0:
-            self._reduce_threads()
-        return self.active_threads() == 0
-
-    def finish (self):
-        """
-        Remove inactive threads.
-        """
-        self._reduce_threads()
-
-    def start_thread (self, func, args, name=None):
-        """
-        Generate a new thread.
-        """
-        if self.threads_max < 1:
-            # threading is disabled
-            func(*args)
-        else:
-            self._acquire()
-            # thread names must be ASCII to avoid conversion problems
-            assert isinstance(name, str) or name is None, \
-                   "Invalid name %r" % name
-            t = threading.Thread(None, func, name, args)
-            t.start()
-            self.threads.append(t)
-
-    def __str__ (self):
-        """
-        String representation of threader state.
-        """
-        return "Threader with %d threads (max %d)" % \
-            (self.active_threads(), self.threads_max)