intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 30 insertions, 0 deletions

diff --git a/util/random/random.h b/util/random/random.h
new file mode 100644
index 0000000000..16b52d3995
--- /dev/null
+++ b/util/random/random.h
@@ -0,0 +1,30 @@
+#pragma once
+
+/*
+ * thread-safe random number generator.
+ *
+ * specialized for:
+ *  all unsigned types (return value in range [0, MAX_VALUE_FOR_TYPE])
+ *  bool
+ *  long double (return value in range [0, 1))
+ *  double (return value in range [0, 1))
+ *  float (return value in range [0, 1))
+ */
+template <class T>
+T RandomNumber();
+
+/*
+ * returns value in range [0, max)
+ */
+template <class T>
+T RandomNumber(T max);
+
+/*
+ * Re-initialize random state - useful after forking in multi-process programs.
+ */
+void ResetRandomState();
+
+/*
+ * Set random SEED
+ */
+void SetRandomSeed(int seed);