Provide alternative for v8::Private and backport NODE_RELEASE

Fixes: #116
PR-URL: #115
Reviewed-By: Michael Dawson <[email protected]>

Author: Gabriel Schulhof

src/node_internals.cc

@@ -95,3 +95,10 @@ NO_RETURN void FatalError(const char* location, const char* message) {
 }
 
 }  // namespace node
+
+#if NODE_MAJOR_VERSION < 6
+v8::Local<v8::Name> v8::Private::ForApi(v8::Isolate* isolate,
+                                         v8::Local<v8::String> key) {
+  return v8::Symbol::ForApi(isolate, key);
+}
+#endif // NODE_MAJOR_VERSION < 6

src/node_internals.h

@@ -5,6 +5,7 @@
 // This is a stripped down shim to allow node_api.cc to build outside of the node source tree.
 //
 
+#include "node_version.h"
 #include "util-inl.h"
 #include <stdio.h>
 
@@ -52,6 +53,10 @@
 #define NO_RETURN
 #endif
 
+#ifndef NODE_RELEASE
+#define NODE_RELEASE "node"
+#endif
+
 namespace node {
 
 // The slightly odd function signature for Assert() is to ease
@@ -67,4 +72,18 @@ NO_RETURN void FatalError(const char* location, const char* message);
 
 }  // namespace node
 
+#if NODE_MAJOR_VERSION < 6
+namespace v8 {
+  namespace Private {
+    v8::Local<v8::Name> ForApi(v8::Isolate* isolate, v8::Local<v8::String> key);
+  }
+}
+#define GetPrivate(context, key) Get((context), (key))
+#define SetPrivate(context, key, value)                                 \
+  DefineOwnProperty((context), (key), (value),                          \
+                    static_cast<v8::PropertyAttribute>(v8::DontEnum |   \
+                                                       v8::DontDelete | \
+                                                       v8::ReadOnly))
+#endif // NODE_MAJOR_VERSION < 6
+
 #endif  // SRC_NODE_INTERNALS_H_