1 files changed, 111 insertions, 0 deletions
diff --git a/src/embind/emval.js b/src/embind/emval.js
new file mode 100644
index 00000000..9574ab37
--- /dev/null
+++ b/src/embind/emval.js
@@ -0,0 +1,111 @@
+/*global Module*/
+/*global HEAP32*/
+/*global Pointer_stringify, writeStringToMemory*/
+/*global requireRegisteredType*/
+
+var _emval_handle_array = [];
+var _emval_free_list = [];
+
+// Public JS API
+
+/** @expose */
+Module.count_emval_handles = function() {
+    return _emval_handle_array.length;
+};
+
+// Private C++ API
+
+function __emval_register(value) {
+    var handle = _emval_free_list.length ?
+        _emval_free_list.pop() :
+        _emval_handle_array.length;
+    _emval_handle_array[handle] = {refcount: 1, value: value};
+    return handle;
+}
+
+function __emval_incref(handle) {
+    _emval_handle_array[handle].refcount += 1;
+}
+
+function __emval_decref(handle) {
+    if (0 === --_emval_handle_array[handle].refcount) {
+        delete _emval_handle_array[handle];
+        _emval_free_list.push(handle);
+
+        var actual_length = _emval_handle_array.length;
+        while (actual_length > 0 && _emval_handle_array[actual_length - 1] === undefined) {
+            --actual_length;
+        }
+        _emval_handle_array.length = actual_length;
+    }
+}
+
+function __emval_new_object() {
+    return __emval_register({});
+}
+
+function __emval_new_long(value) {
+    return __emval_register(value);
+}
+
+function __emval_new_cstring(str) {
+    return __emval_register(Pointer_stringify(str));
+}
+
+function __emval_get_property(handle, k) {
+    k = Pointer_stringify(k);
+    return __emval_register(_emval_handle_array[handle].value[k]);
+}
+
+function __emval_get_property_by_long(handle, k) {
+    return __emval_register(_emval_handle_array[handle].value[k]);
+}
+
+function __emval_get_property_by_unsigned_long(handle, k) {
+    return __emval_register(_emval_handle_array[handle].value[k]);
+}
+
+function __emval_set_property(handle, k, value) {
+    k = Pointer_stringify(k);
+    _emval_handle_array[handle].value[k] = _emval_handle_array[value].value;
+}
+
+function __emval_set_property_by_int(handle, k, value) {
+    _emval_handle_array[handle].value[k] = _emval_handle_array[value].value;
+}
+
+function __emval_as(handle, returnType) {
+    returnType = requireRegisteredType(returnType, 'emval::as');
+    var destructors = [];
+    // caller owns destructing
+    return returnType.toWireType(destructors, _emval_handle_array[handle].value);
+}
+
+function __emval_call(handle, argCount, argTypes) {
+    var args = Array.prototype.slice.call(arguments, 3);
+    var fn = _emval_handle_array[handle].value;
+    var a = new Array(argCount);
+    for (var i = 0; i < argCount; ++i) {
+        var argType = requireRegisteredType(
+            HEAP32[(argTypes >> 2) + i],
+            "parameter " + i);
+        a[i] = argType.fromWireType(args[i]);
+    }
+    var rv = fn.apply(undefined, a);
+    return __emval_register(rv);
+}
+
+function __emval_call_method(handle, name, argCount, argTypes) {
+    name = Pointer_stringify(name);
+    var args = Array.prototype.slice.call(arguments, 4);
+    var obj = _emval_handle_array[handle].value;
+    var a = new Array(argCount);
+    for (var i = 0; i < argCount; ++i) {
+        var argType = requireRegisteredType(
+            HEAP32[(argTypes >> 2) + i],
+            "parameter " + i);
+        a[i] = argType.fromWireType(args[i]);
+    }
+    var rv = obj[name].apply(obj, a);
+    return __emval_register(rv);
+}