X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=dali%2Fpublic-api%2Fmath%2Frandom.h;h=1b08956942622ac6a351c956f73908c24af912cf;hb=646f736e77b085c86e982c0d1d4b895c2a431330;hp=5ba0c95eba8ea049b3b50ea9fbbb11d6b435abab;hpb=f3275df8b57e8904f1a5e23f5fc031d6046c2cb0;p=platform%2Fcore%2Fuifw%2Fdali-core.git

diff --git a/dali/public-api/math/random.h b/dali/public-api/math/random.h
index 5ba0c95..1b08956 100644
--- a/dali/public-api/math/random.h
+++ b/dali/public-api/math/random.h
@@ -2,7 +2,7 @@
 #define __DALI_RANDOM_H__
 
 /*
- * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -42,20 +42,32 @@ namespace Random
  * @SINCE_1_0.0
  * @param[in] f0 The lower bound
  * @param[in] f1 The upper bound
- * @return a random value between the lower and upper bound
+ * @return A random value between the lower and upper bound
  */
 inline float Range(float f0, float f1)
 {
   float min = std::min(f0, f1);
   float max = std::max(f0, f1);
-  return min + (rand() & 0xfff) * (max-min) * (1.0f/4095.0f);
+
+  // Ensure we initialize only once. As it's inlined, this static variable will exist in the code-block using it, thus,
+  // will be created and then initialized again when another code-block uses this.
+  static bool initialized( false );
+  if( !initialized )
+  {
+    uint32_t seed = static_cast<uint32_t>( time( NULL ) );
+    srand( seed );
+    initialized = true;
+  }
+
+  int32_t randValue = rand();
+  return static_cast<float>(randValue & 0xfff) * (1.0f/4095.0f) * (max-min) + min;
 }
 
 /**
  * @brief Function to return a normalized axis in a random direction.
  *
  * @SINCE_1_0.0
- * @return the axis
+ * @return The axis
  */
 inline Vector4 Axis()
 {