1 files changed, 35 insertions, 0 deletions
diff --git a/examples/summaries/cocoa/cache.py b/examples/summaries/cocoa/cache.py
new file mode 100644
index 000000000000..066829d80d4f
--- /dev/null
+++ b/examples/summaries/cocoa/cache.py
@@ -0,0 +1,35 @@
+"""
+Objective-C runtime wrapper for use by LLDB Python formatters
+
+part of The LLVM Compiler Infrastructure
+This file is distributed under the University of Illinois Open Source
+License. See LICENSE.TXT for details.
+"""
+import lldb.formatters.metrics
+
+class Cache:
+	def __init__(self):
+		self.data = {}
+		self.statistics = lldb.formatters.metrics.Metrics()
+		self.statistics.add_metric('hit')
+		self.statistics.add_metric('miss')
+
+	def look_for_key(self,key):
+		if key in self.data:
+			return True
+		return False
+
+	def add_item(self,key,value,ok_to_replace=True):
+		if not(ok_to_replace) and self.look_for_key(key):
+			return False
+		self.data[key] = value
+		return True
+
+	def get_value(self,key,default=None):
+		if self.look_for_key(key):
+			self.statistics.metric_hit('hit',key)
+			return self.data[key]
+		else:
+			self.statistics.metric_hit('miss',key)
+			return default
+