Merge pull request #15912 from Treeston/3.3.5-urandms

Core/Util: Add urandms(minMS, maxMS) helper
(cherry picked from commit c1b4cd21f3debc2eb5e462c5adce659b558c7dc9)

src/common/Utilities/Util.cpp

@@ -59,6 +59,13 @@ uint32 urand(uint32 min, uint32 max)
     return GetRng()->URandom(min, max);
 }
 
+uint32 urandms(uint32 min, uint32 max)
+{
+    ASSERT(max >= min);
+    ASSERT(INT_MAX/IN_MILLISECONDS >= max);
+    return GetRng()->URandom(min * IN_MILLISECONDS, max * IN_MILLISECONDS);
+}
+
 float frand(float min, float max)
 {
     ASSERT(max >= min);

src/common/Utilities/Util.h

@@ -84,6 +84,9 @@ int32 irand(int32 min, int32 max);
 /* Return a random number in the range min..max (inclusive). */
 uint32 urand(uint32 min, uint32 max);
 
+/* Return a random millisecond value between min and max seconds. Functionally equivalent to urand(min*IN_MILLISECONDS, max*IN_MILLISECONDS). */
+uint32 urandms(uint32 min, uint32 max);
+
 /* Return a random number in the range 0 .. UINT32_MAX. */
 uint32 rand32();