From 75e62269c31626b1d4fa36644fdfd98958a2699c Mon Sep 17 00:00:00 2001
From: Leonardo Di Donato <leodidonato@gmail.com>
Date: Mon, 22 Jun 2020 15:40:20 +0000
Subject: [PATCH] new: hardware_concurrency helper

Co-authored-by: Lorenzo Fontana <lo@linux.com>
Signed-off-by: Leonardo Di Donato <leodidonato@gmail.com>
---
 userspace/engine/falco_utils.cpp | 6 ++++++
 userspace/engine/falco_utils.h   | 4 ++++
 2 files changed, 10 insertions(+)

diff --git a/userspace/engine/falco_utils.cpp b/userspace/engine/falco_utils.cpp
index 44922e65..2468f905 100644
--- a/userspace/engine/falco_utils.cpp
+++ b/userspace/engine/falco_utils.cpp
@@ -52,6 +52,12 @@ std::string wrap_text(const std::string& str, uint32_t initial_pos, uint32_t ind
 	return ret;
 }
 
+uint32_t hardware_concurrency()
+{
+	auto hc = std::thread::hardware_concurrency();
+	return hc ? hc : 1;
+}
+
 void readfile(const std::string& filename, std::string& data)
 {
 	std::ifstream file(filename.c_str(), std::ios::in);
diff --git a/userspace/engine/falco_utils.h b/userspace/engine/falco_utils.h
index 25def9ad..37795e44 100644
--- a/userspace/engine/falco_utils.h
+++ b/userspace/engine/falco_utils.h
@@ -21,6 +21,7 @@ limitations under the License.
 #include <fstream>
 #include <iostream>
 #include <string>
+#include <thread>
 #include <nonstd/string_view.hpp>
 
 #pragma once
@@ -34,6 +35,9 @@ namespace utils
 std::string wrap_text(const std::string& str, uint32_t initial_pos, uint32_t indent, uint32_t line_len);
 
 void readfile(const std::string& filename, std::string& data);
+
+uint32_t hardware_concurrency();
+
 namespace network
 {
 static const std::string UNIX_SCHEME("unix://");