Add the files

1 files changed, 35 insertions, 0 deletions

diff --git a/src/detection/memory/memory_apple.c b/src/detection/memory/memory_apple.c
new file mode 100644
index 0000000..6203949
--- /dev/null
+++ b/src/detection/memory/memory_apple.c
@@ -0,0 +1,35 @@
+#include "memory.h"
+#include "common/debug.h"
+
+#include <string.h>
+#include <mach/mach.h>
+#include <sys/sysctl.h>
+#include <unistd.h>
+
+const char* ffDetectMemory(FFMemoryResult* ram) {
+    size_t length = sizeof(ram->bytesTotal);
+
+#if FF_APPLE_MEMSIZE_USABLE
+    if (sysctlbyname("hw.memsize_usable", &ram->bytesTotal, &length, NULL, 0) != 0) {
+        return "Failed to read hw.memsize_usable";
+    }
+#else
+    if (sysctl((int[]) { CTL_HW, HW_MEMSIZE }, 2, &ram->bytesTotal, &length, NULL, 0) != 0) {
+        return "Failed to read hw.memsize";
+    }
+#endif
+
+    mach_msg_type_number_t count = HOST_VM_INFO64_COUNT;
+    vm_statistics64_data_t vmstat;
+    if (host_statistics64(mach_host_self(), HOST_VM_INFO64, (host_info64_t) (&vmstat), &count) != KERN_SUCCESS) {
+        return "Failed to read host_statistics64";
+    }
+
+    // https://github.com/st3fan/osx-10.9/blob/34e34a6a539b5a822cda4074e56a7ced9b57da71/system_cmds-597.1.1/vm_stat.tproj/vm_stat.c#L139
+
+    uint64_t pagesFree = vmstat.free_count - vmstat.speculative_count;
+    uint64_t pagesFileBacked = vmstat.external_page_count; // Cached files
+    ram->bytesUsed = ram->bytesTotal - (pagesFree + pagesFileBacked) * instance.state.platform.sysinfo.pageSize;
+
+    return NULL;
+}