python, hg: tow outside the environment.

they've served us well, and can ride off into the sunset.

1 files changed, 0 insertions, 52 deletions

diff --git a/sys/lib/python/mutex.py b/sys/lib/python/mutex.py
deleted file mode 100644
index 5d35bdf6a..000000000
--- a/sys/lib/python/mutex.py
+++ /dev/null
@@ -1,52 +0,0 @@
-"""Mutual exclusion -- for use with module sched
-
-A mutex has two pieces of state -- a 'locked' bit and a queue.
-When the mutex is not locked, the queue is empty.
-Otherwise, the queue contains 0 or more (function, argument) pairs
-representing functions (or methods) waiting to acquire the lock.
-When the mutex is unlocked while the queue is not empty,
-the first queue entry is removed and its function(argument) pair called,
-implying it now has the lock.
-
-Of course, no multi-threading is implied -- hence the funny interface
-for lock, where a function is called once the lock is aquired.
-"""
-
-from collections import deque
-
-class mutex:
-    def __init__(self):
-        """Create a new mutex -- initially unlocked."""
-        self.locked = 0
-        self.queue = deque()
-
-    def test(self):
-        """Test the locked bit of the mutex."""
-        return self.locked
-
-    def testandset(self):
-        """Atomic test-and-set -- grab the lock if it is not set,
-        return True if it succeeded."""
-        if not self.locked:
-            self.locked = 1
-            return True
-        else:
-            return False
-
-    def lock(self, function, argument):
-        """Lock a mutex, call the function with supplied argument
-        when it is acquired.  If the mutex is already locked, place
-        function and argument in the queue."""
-        if self.testandset():
-            function(argument)
-        else:
-            self.queue.append((function, argument))
-
-    def unlock(self):
-        """Unlock a mutex.  If the queue is not empty, call the next
-        function with its argument."""
-        if self.queue:
-            function, argument = self.queue.popleft()
-            function(argument)
-        else:
-            self.locked = 0