From b68776cc2acda4aa979b7381ddfffd246a00e483 Mon Sep 17 00:00:00 2001
From: Ryou Ezoe <boostcpp@gmail.com>
Date: Wed, 2 Mar 2016 19:02:02 +0900
Subject: [PATCH] aquire number of thread to create from hardware_concurrency()

---
 main.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/main.cpp b/main.cpp
index 6ebda58..7e425f2 100644
--- a/main.cpp
+++ b/main.cpp
@@ -65,7 +65,7 @@ void square_am_signal(float time, float frequency)
 int main()
 {
 
-    for ( unsigned i = 0 ; i < 8 ; ++i )
+    for ( unsigned i = 0 ; i < std::thread::hardware_concurrency() ; ++i )
     {
         std::thread t( boost_song ) ;
         t.detach() ;