1 files changed, 51 insertions, 0 deletions
diff --git a/include/core/SkInstCnt.h b/include/core/SkInstCnt.h
new file mode 100644
index 0000000000..889c098d77
--- /dev/null
+++ b/include/core/SkInstCnt.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+#ifndef SkInstCnt_DEFINED
+#define SkInstCnt_DEFINED
+
+/*
+ * The instance counting system consists of three macros that create the 
+ * instance counting machinery. A class is added to the system by adding:
+ *   DECLARE_INST_COUNT at the top of its declaration
+ *   DEFINE_INST_COUNT at the top of its .cpp file
+ *   and a PRINT_INST_COUNT line at the application's end point
+ */
+#ifdef SK_DEBUG
+#define DECLARE_INST_COUNT                  \
+    class SkInstanceCountHelper {           \
+    public:                                 \
+        SkInstanceCountHelper() {           \
+            gInstanceCount++;               \
+        }                                   \
+                                            \
+        ~SkInstanceCountHelper() {          \
+            gInstanceCount--;               \
+        }                                   \
+                                            \
+        static int32_t gInstanceCount;      \
+    } fInstanceCountHelper;                 \
+                                            \
+    static int32_t GetInstanceCount() {     \
+        return SkInstanceCountHelper::gInstanceCount;   \
+    }
+
+#define DEFINE_INST_COUNT(className)        \
+    int32_t className::SkInstanceCountHelper::gInstanceCount = 0;
+
+#define PRINT_INST_COUNT(className)         \
+    SkDebugf("Leaked %s objects: %d\n",     \
+                  #className,               \
+                  className::GetInstanceCount());
+#else
+#define DECLARE_INST_COUNT
+#define DEFINE_INST_COUNT(className)
+#define PRINT_INST_COUNT(className)
+#endif
+
+#endif // SkInstCnt_DEFINED