1 files changed, 0 insertions, 93 deletions
diff --git a/lib/python2.7/site-packages/django/utils/synch.py b/lib/python2.7/site-packages/django/utils/synch.py
deleted file mode 100644
index 4859907..0000000
--- a/lib/python2.7/site-packages/django/utils/synch.py
+++ /dev/null
@@ -1,93 +0,0 @@
-"""
-Synchronization primitives:
-
-    - reader-writer lock (preference to writers)
-
-(Contributed to Django by eugene@lazutkin.com)
-"""
-
-import contextlib
-try:
-    import threading
-except ImportError:
-    import dummy_threading as threading
-
-
-class RWLock(object):
-    """
-    Classic implementation of reader-writer lock with preference to writers.
-
-    Readers can access a resource simultaneously.
-    Writers get an exclusive access.
-
-    API is self-descriptive:
-        reader_enters()
-        reader_leaves()
-        writer_enters()
-        writer_leaves()
-    """
-    def __init__(self):
-        self.mutex     = threading.RLock()
-        self.can_read  = threading.Semaphore(0)
-        self.can_write = threading.Semaphore(0)
-        self.active_readers  = 0
-        self.active_writers  = 0
-        self.waiting_readers = 0
-        self.waiting_writers = 0
-
-    def reader_enters(self):
-        with self.mutex:
-            if self.active_writers == 0 and self.waiting_writers == 0:
-                self.active_readers += 1
-                self.can_read.release()
-            else:
-                self.waiting_readers += 1
-        self.can_read.acquire()
-
-    def reader_leaves(self):
-        with self.mutex:
-            self.active_readers -= 1
-            if self.active_readers == 0 and self.waiting_writers != 0:
-                self.active_writers  += 1
-                self.waiting_writers -= 1
-                self.can_write.release()
-
-    @contextlib.contextmanager
-    def reader(self):
-        self.reader_enters()
-        try:
-            yield
-        finally:
-            self.reader_leaves()
-
-    def writer_enters(self):
-        with self.mutex:
-            if self.active_writers == 0 and self.waiting_writers == 0 and self.active_readers == 0:
-                self.active_writers += 1
-                self.can_write.release()
-            else:
-                self.waiting_writers += 1
-        self.can_write.acquire()
-
-    def writer_leaves(self):
-        with self.mutex:
-            self.active_writers -= 1
-            if self.waiting_writers != 0:
-                self.active_writers  += 1
-                self.waiting_writers -= 1
-                self.can_write.release()
-            elif self.waiting_readers != 0:
-                t = self.waiting_readers
-                self.waiting_readers = 0
-                self.active_readers += t
-                while t > 0:
-                    self.can_read.release()
-                    t -= 1
-
-    @contextlib.contextmanager
-    def writer(self):
-        self.writer_enters()
-        try:
-            yield
-        finally:
-            self.writer_leaves()