From 303a9eb974f884b5f9f7e14fdd83a821f21e32e6 Mon Sep 17 00:00:00 2001
From: Ryo Nakamura <upa@haeena.net>
Date: Sat, 15 Oct 2022 21:59:25 +0900
Subject: initial commit

---
 src/platform.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 src/platform.c

(limited to 'src/platform.c')

diff --git a/src/platform.c b/src/platform.c
new file mode 100644
index 0000000..5e0573e
--- /dev/null
+++ b/src/platform.c
@@ -0,0 +1,27 @@
+#include <util.h>
+#include <platform.h>
+
+#ifdef __APPLE__
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#elif linux
+#else
+#error unsupported platform
+#endif
+
+
+#ifdef __APPLE__
+int nr_cpus()
+{
+        int n;
+        size_t size = sizeof(n);
+
+        if (sysctlbyname("machdep.cpu.core_count", &n, &size, NULL, 0) != 0) {
+                pr_err("failed to get number of cpu cores: %s\n", strerrno());
+                return -1;
+        }
+
+        return n;
+}
+#endif
+
-- 
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