working example of how to use jsctypes to include native code in a module

packages/chromeless-kit/lib/jsctypes/mylib.c

@@ -0,0 +1,5 @@
+const char * gettaStringFromNativeCode(void) 
+{
+    return "This string has come a loooong way";
+}
+

packages/chromeless-kit/lib/jsctypes/mylib.js

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+const {Cc,Ci,Cm,Cr,Cu} = require("chrome");
+
+const path = require("path");
+
+/* Load JS Ctypes Javascript module */
+ctypes = {};
+Cu.import("resource://gre/modules/ctypes.jsm", ctypes);
+ctypes = ctypes.ctypes;
+
+exports.getString = function() {
+    let pathToLib = require("url").toFilename(__url__);
+    pathToLib = path.join(path.dirname(pathToLib), 'libmylib.dylib');
+    let lib = ctypes.open(pathToLib);
+    let getStr = lib.declare("gettaStringFromNativeCode",
+                             ctypes.default_abi,
+                             ctypes.char.ptr);
+    let rv = getStr().readString();
+    lib.close();
+    return rv;
+};

toph/index.html

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+<script>
+const mylib = require('jsctypes/mylib');
+console.log(mylib.getString());
+</script>