feat: add a histrical wit-bindgen

__wasm/wit-bindgen-sample/wit-bindgen/crates/gen-spidermonkey/spidermonkey-wasm/cx.cpp

@@ -0,0 +1,33 @@
+#include <assert.h>
+
+#include "smw/cx.h"
+
+#include "jsapi.h"
+
+namespace smw {
+
+static JSContext* CONTEXT = nullptr;
+
+void init_js_context(JSContext *cx) {
+    assert(!CONTEXT && "CONTEXT should only be initialized once");
+    CONTEXT = cx;
+}
+
+JSContext *get_js_context() {
+    assert(CONTEXT && "CONTEXT should be initialized");
+    return CONTEXT;
+}
+
+static JS::PersistentRooted<JSObject*> USER_MODULE;
+
+void init_user_module(JSContext* cx, JSObject* user_module) {
+    assert(!USER_MODULE && "USER_MODULE should only be initialized once");
+    USER_MODULE.init(cx, user_module);
+}
+
+JSObject* get_user_module() {
+    assert(USER_MODULE && "USER_MODULE should be initialized");
+    return USER_MODULE;
+}
+
+} // namespace smw