src: inherit first from AsyncWrap

To make sure casting a class of multiple inheritance from a void* to
AsyncWrap succeeds make AsyncWrap the first inherited class.

PR-URL: https://github.com/nodejs/node/pull/6184
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

src/js_stream.cc

@@ -22,8 +22,8 @@ using v8::Value;
 
 
 JSStream::JSStream(Environment* env, Local<Object> obj, AsyncWrap* parent)
-    : StreamBase(env),
-      AsyncWrap(env, obj, AsyncWrap::PROVIDER_JSSTREAM, parent) {
+    : AsyncWrap(env, obj, AsyncWrap::PROVIDER_JSSTREAM, parent),
+      StreamBase(env) {
   node::Wrap(obj, this);
   MakeWeak<JSStream>(this);
 }

src/js_stream.h

@@ -8,7 +8,7 @@
 
 namespace node {
 
-class JSStream : public StreamBase, public AsyncWrap {
+class JSStream : public AsyncWrap, public StreamBase {
  public:
   static void Initialize(v8::Local<v8::Object> target,
                          v8::Local<v8::Value> unused,

src/node_crypto.h

@@ -322,7 +322,7 @@ class SSLWrap {
 // Connection inherits from AsyncWrap because SSLWrap makes calls to
 // MakeCallback, but SSLWrap doesn't store the handle itself. Instead it
 // assumes that any args.This() called will be the handle from Connection.
-class Connection : public SSLWrap<Connection>, public AsyncWrap {
+class Connection : public AsyncWrap, public SSLWrap<Connection> {
  public:
   ~Connection() override {
 #ifdef SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
@@ -387,8 +387,8 @@ class Connection : public SSLWrap<Connection>, public AsyncWrap {
              v8::Local<v8::Object> wrap,
              SecureContext* sc,
              SSLWrap<Connection>::Kind kind)
-      : SSLWrap<Connection>(env, sc, kind),
-        AsyncWrap(env, wrap, AsyncWrap::PROVIDER_CRYPTO),
+      : AsyncWrap(env, wrap, AsyncWrap::PROVIDER_CRYPTO),
+        SSLWrap<Connection>(env, sc, kind),
         bio_read_(nullptr),
         bio_write_(nullptr),
         hello_offset_(0) {