From ae51349344ca97f140af566598664159d29dca0f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adrien=20B=C3=A9raud?= <adrien.beraud@savoirfairelinux.com>
Date: Fri, 8 Dec 2023 13:38:52 -0500
Subject: [PATCH] manager: add function to derive random engines from the main
one
Seeding a random engine from other ones is a common practice that
reduce resource consumption.
Change-Id: I2e692fc2d5caec456c86134cf7d15f4da5017997
---
src/manager.cpp | 10 ++++++++++
src/manager.h | 2 ++
2 files changed, 12 insertions(+)
diff --git a/src/manager.cpp b/src/manager.cpp
index 4e5bce6f81..54722f24bc 100644
--- a/src/manager.cpp
+++ b/src/manager.cpp
@@ -2771,6 +2771,16 @@ Manager::setAccountDetails(const std::string& accountID,
});
}
+std::mt19937_64
+Manager::getSeededRandomEngine()
+{
+ std::array<std::mt19937_64::result_type, std::mt19937_64::state_size> sub_seeds;
+ for (auto& sub_seed : sub_seeds)
+ sub_seed = rand_();
+ std::seed_seq seed(sub_seeds.begin(), sub_seeds.end());
+ return std::mt19937_64(seed);
+}
+
std::string
Manager::getNewAccountId()
{
diff --git a/src/manager.h b/src/manager.h
index a0e822d8f1..659697cd0c 100644
--- a/src/manager.h
+++ b/src/manager.h
@@ -442,6 +442,8 @@ public:
void setAccountActive(const std::string& accountID, bool active, bool shutdownConnections);
+ std::mt19937_64 getSeededRandomEngine();
+
/**
* Return a new random accountid that is not present in the list
* @return A brand new accountid
--
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