From 973d411598958d968226ed878d9426f23e8f7cbf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Nusser?= <andre.nusser@googlemail.com>
Date: Sat, 16 Jul 2016 17:27:08 +0200
Subject: Memchecker code for OS X.

---
 src/memchecker.cc | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/memchecker.cc b/src/memchecker.cc
index 6d66965..2bdbf34 100644
--- a/src/memchecker.cc
+++ b/src/memchecker.cc
@@ -30,6 +30,11 @@
 
 #if DG_PLATFORM == DG_PLATFORM_LINUX
 #include <sys/sysinfo.h>
+#elif DG_PLATFORM == DG_PLATFORM_OSX
+#include <mach/vm_statistics.h>
+#include <mach/mach_types.h>
+#include <mach/mach_init.h>
+#include <mach/mach_host.h>
 #endif
 
 #include <sndfile.h>
@@ -58,7 +63,16 @@ uint64_t MemChecker::calcFreeMemory() const
 	GlobalMemoryStatusEx(&status);
 	free_memory = status.ullAvailPhys;
 #elif DG_PLATFORM == DG_PLATFORM_OSX
-	// TODO
+	vm_size_t page_size;
+	vm_statistics64_data_t vm_stats;
+	mach_port_t mach_port = mach_host_self();
+	mach_msg_type_number_t count = sizeof(vm_stats) / sizeof(natural_t);
+
+	if (KERN_SUCCESS == host_page_size(mach_port, &page_size) &&
+	    KERN_SUCCESS == host_statistics64(mach_port, HOST_VM_INFO, (host_info64_t)&vm_stats, &count))
+	{
+		free_memory = (uint64_t)vm_stats.free_count * (uint64_t)page_size;
+	}
 #elif DG_PLATFORM == DG_PLATFORM_UNIX
 	// TODO
 #endif
-- 
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