1 files changed, 17 insertions, 9 deletions
diff --git a/src/random.h b/src/random.h
index 2d8ab085e3..518a5cd3e3 100644
--- a/src/random.h
+++ b/src/random.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -40,17 +40,17 @@
  *   These entropy sources are slower, but designed to make sure the RNG state contains
  *   fresh data that is unpredictable to attackers.
  *
- * - RandAddSeedSleep() seeds everything that fast seeding includes, but additionally:
- *   - A high-precision timestamp before and after sleeping 1ms.
- *   - (On Windows) Once every 10 minutes, performance monitoring data from the OS.
- -   - Once every minute, strengthen the entropy for 10 ms using repeated SHA512.
- *   These just exploit the fact the system is idle to improve the quality of the RNG
- *   slightly.
+ * - RandAddPeriodic() seeds everything that fast seeding includes, but additionally:
+ *   - A high-precision timestamp
+ *   - Dynamic environment data (performance monitoring, ...)
+ *   - Strengthen the entropy for 10 ms using repeated SHA512.
+ *   This is run once every minute.
  *
  * On first use of the RNG (regardless of what function is called first), all entropy
  * sources used in the 'slow' seeder are included, but also:
  * - 256 bits from the hardware RNG (rdseed or rdrand) when available.
- * - (On Windows) Performance monitoring data from the OS.
+ * - Dynamic environment data (performance monitoring, ...)
+ * - Static environment data
  * - Strengthen the entropy for 100 ms using repeated SHA512.
  *
  * When mixing in new entropy, H = SHA512(entropy || old_rng_state) is computed, and
@@ -87,7 +87,15 @@ void GetStrongRandBytes(unsigned char* buf, int num) noexcept;
  *
  * Thread-safe.
  */
-void RandAddPeriodic();
+void RandAddPeriodic() noexcept;
+
+/**
+ * Gathers entropy from the low bits of the time at which events occur. Should
+ * be called with a uint32_t describing the event at the time an event occurs.
+ *
+ * Thread-safe.
+ */
+void RandAddEvent(const uint32_t event_info) noexcept;
 
 /**
  * Fast randomness source. This is seeded once with secure random data, but