From c9c4ca4f77ff3a52aac7eb476bda36f17d03b7f8 Mon Sep 17 00:00:00 2001
From: q66 <daniel@octaforge.org>
Date: Fri, 25 Sep 2015 19:42:34 +0100
Subject: [PATCH] add ostd::cpu_count_get in platform.hh

---
 ostd/platform.hh | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/ostd/platform.hh b/ostd/platform.hh
index 9b2153a..5dde22b 100644
--- a/ostd/platform.hh
+++ b/ostd/platform.hh
@@ -71,6 +71,13 @@
 #  endif
 #endif
 
+#ifndef OSTD_PLATFORM_WIN32
+#include <unistd.h>
+#else
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#endif
+
 namespace ostd {
 
 #if defined(OSTD_TOOLCHAIN_GNU)
@@ -115,6 +122,22 @@ inline uint64_t endian_swap64(uint64_t x) {
 
 #endif
 
+inline int cpu_count_get() {
+    static int count = 0;
+    if (count <= 0) {
+#ifdef OSTD_PLATFORM_WIN32
+        SYSTEM_INFO info;
+        GetSystemInfo(&info);
+        count = info.dwNumberOfProcessors;
+#elif defined(_SC_NPROCESSORS_ONLN)
+        count = int(sysconf(_SC_NPROCESSORS_ONLN));
+#endif
+        if (count <= 0)
+            count = 1;
+    }
+    return count;
+}
+
 }
 
 #endif
\ No newline at end of file