os.clock

2 files changed, 10 insertions, 4 deletions

diff --git a/README.md b/README.md
index c0fd4f3..fd9b4ee 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,8 @@
     - [x] utf8
     - [ ] Package
     - [ ] os
+        - [x] `os.clock()`
+        - [x] `os.difftime()`
         - [x] `os.execute()`
         - [x] `os.exit()`
         - [x] `os.getenv()`
@@ -31,10 +33,8 @@
         - [x] `os.rename()`
         - [x] `os.time()`
         - [x] `os.tmpname()`
-        - [ ] `os.clock()`
         - [ ] `os.date()`
-        - [ ] `os.difftime()`
-        - [ ] `os.setlocale()`
+        - [ ] ~~`os.setlocale()`~~
     - [ ] io
         - [ ] `io.stdin`
         - [ ] `io.stdout`
diff --git a/src/loslib.js b/src/loslib.js
index 4c3331d..98686c4 100644
--- a/src/loslib.js
+++ b/src/loslib.js
@@ -80,7 +80,7 @@ const syslib = {
 };
 
 // Only with Node
-if (process && process.exit && process.env) {
+if (process && process.exit && process.env && process.uptime) {
     const os_exit = function(L) {
         let status;
         if (lua.lua_isboolean(L, 1))
@@ -98,6 +98,12 @@ if (process && process.exit && process.env) {
         return 1;
     };
 
+    const os_clock = function(L) {
+        lua.lua_pushnumber(L, process.uptime());
+        return 1;
+    };
+
+    syslib.clock = os_clock;
     syslib.exit = os_exit;
     syslib.getenv = os_getenv;
 }