[sys/info] Add sysctl MIBs for MacOS.

core/sys/info/platform_darwin.odin

@@ -13,9 +13,6 @@ init_os_version :: proc "c" () {
 init_ram :: proc() {
 	// Retrieve RAM info using `sysinfo`
 
-	CTL_HW     :: 6
-	HW_MEMSIZE :: 24
-
 	mib := []i32{CTL_HW, HW_MEMSIZE}
 	mem_size: i64
 	ok := sysctl(mib, &mem_size)
@@ -34,4 +31,30 @@ sysctl :: proc(mib: []i32, val: ^$T) -> (ok: bool) {
 		uintptr(0), uintptr(0),
 	)
 	return res == 0
-}
+}
+
+// See sysctl.h for xnu/dwrwin for details
+CTL_KERN    :: 1
+	KERN_OSTYPE    :: 1  /* string: system version */
+	KERN_OSRELEASE :: 2  /* string: system release */
+	KERN_OSREV     :: 3  /* int: system revision */
+	KERN_VERSION   :: 4  /* string: compile time info */
+	KERN_OSRELDATE :: 26 /* int: OS release date */
+	KERN_OSVERSION :: 65 /* for build number i.e. 9A127 */
+CTL_VM      :: 2
+CTL_VFS     :: 3
+CTL_NET     :: 4
+CTL_DEBUG   :: 5
+CTL_HW      :: 6
+	HW_MACHINE      :: 1  /* string: machine class */
+	HW_MODEL        :: 2  /* string: specific machine model */
+	HW_NCPU         :: 3  /* int: number of cpus */
+	HW_BYTEORDER    :: 4  /* int: machine byte order */
+	HW_MACHINE_ARCH :: 12 /* string: machine architecture */
+	HW_VECTORUNIT   :: 13 /* int: has HW vector unit? */
+	HW_MEMSIZE      :: 24 /* uint64_t: physical ram size */
+	HW_AVAILCPU     :: 25 /* int: number of available CPUs */
+
+CTL_MACHDEP :: 7
+CTL_USER    :: 8
+