From 5538372dc5eee71d882d6cf3c8073e89faab55ba Mon Sep 17 00:00:00 2001
From: Moshe Gottlieb <moshe@sharkfood.com>
Date: Sun, 8 Jan 2017 11:04:33 +0200
Subject: [PATCH] Use sysconf on macOS to determine number of CPUs

Added #if defined(__APPLE__) wrapper for count_processors, using sysconf (libc, include unistd.h which is already indirectly included).
sysconf(_SC_NPROCESSORS_ONLN) returns the number of processors currently online or -1 if there was an error, this function uses -1 to denote an error so this works fine.
---
 vanitygen.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/vanitygen.c b/vanitygen.c
index 9d88121..be4bfd5 100644
--- a/vanitygen.c
+++ b/vanitygen.c
@@ -244,6 +244,9 @@ vg_thread_loop(void *arg)
 int
 count_processors(void)
 {
+#if defined(__APPLE__)
+    int count = sysconf(_SC_NPROCESSORS_ONLN);
+#else
 	FILE *fp;
 	char buf[512];
 	int count = 0;
@@ -257,7 +260,8 @@ count_processors(void)
 			count += 1;
 	}
 	fclose(fp);
-	return count;
+#endif
+    return count;
 }
 #endif