shithub: libmujs

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Add callback example to docs to show how to use js_ref.

--- a/docs/examples.html

+++ b/docs/examples.html

@@ -75,6 +75,30 @@

 js_setglobal(J, "t");

 </pre>

+<h2>Callbacks from C to JS</h2>

+

+<pre>

+const char *handle = NULL; /* handle to stowed away js function */

+

+static void set_callback(js_State *J)

+{

+	if (handle)

+		js_unref(J, handle); /* delete old function */

+	js_copy(J, 1);

+	handle = js_ref(J); /* stow the js function in the registry */

+}

+

+static void call_callback(js_State *J, int arg1, int arg2)

+{

+	js_getregistry(J, handle); /* retrieve the js function from the registry */

+	js_pushnull(J);

+	js_pushnumber(J, arg1);

+	js_pushnumber(J, arg2);

+	js_pcall(J, 2);

+	js_pop(J, 1);

+}

+</pre>

+

 <h2>Complete userdata example</h2>

 <pre>