Initial project import

tools/v/vlib/runtime/runtime_nix.c.v

@@ -0,0 +1,35 @@
+module runtime
+
+fn C.sysconf(name i32) i64
+
+// nr_cpus returns the number of virtual CPU cores found on the system.
+pub fn nr_cpus() int {
+	mut cpus := int(C.sysconf(C._SC_NPROCESSORS_ONLN))
+	if cpus < 1 {
+		eprintln('Warning: sysconf(_SC_NPROCESSORS_ONLN) returned -1, returning CPU count as 1')
+		cpus = 1
+	}
+	return cpus
+}
+
+// total_memory returns total physical memory found on the system.
+pub fn total_memory() !usize {
+	page_size := usize(C.sysconf(C._SC_PAGESIZE))
+	c_errno_1 := C.errno
+	if page_size == usize(-1) {
+		return error('total_memory: `C.sysconf(C._SC_PAGESIZE)` return error code = ${c_errno_1}')
+	}
+	phys_pages := usize(C.sysconf(C._SC_PHYS_PAGES))
+	c_errno_2 := C.errno
+	if phys_pages == usize(-1) {
+		return error('total_memory: `C.sysconf(C._SC_PHYS_PAGES)` return error code = ${c_errno_2}')
+	}
+	return page_size * phys_pages
+}
+
+// free_memory returns free physical memory found on the system.
+// Note: implementation available only on Darwin, FreeBSD, Linux, OpenBSD and
+// Windows. Otherwise, returns 'free_memory: not implemented'.
+pub fn free_memory() !usize {
+	return free_memory_impl()!
+}