enable v8plus_call to be used in any thread

@@ -414,11 +414,11 @@
 
         return (exception);
 }
 
 extern "C" nvlist_t *
-v8plus_call(v8plus_jsfunc_t f, const nvlist_t *lp)
+v8plus_call_direct(v8plus_jsfunc_t f, const nvlist_t *lp)
 {
         std::unordered_map<uint64_t, cb_hdl_t>::iterator it;
         const int max_argc = nvlist_length(lp);
         int argc, err;
         v8::Handle<v8::Value> argv[max_argc];

@@ -524,11 +524,11 @@
         }
         ++it->second.ch_refs;
 }
 
 extern "C" void
-v8plus_jsfunc_rele(v8plus_jsfunc_t f)
+v8plus_jsfunc_rele_direct(v8plus_jsfunc_t f)
 {
         v8::Local<v8::Function> lfh;
         std::unordered_map<uint64_t, cb_hdl_t>::iterator it;
 
         if ((it = cbhash.find(f)) == cbhash.end())

@@ -638,10 +638,10 @@
         v8plus::ObjectWrap *op = v8plus::ObjectWrap::objlookup(cop);
         op->public_Ref();
 }
 
 extern "C" void
-v8plus_obj_rele(const void *cop)
+v8plus_obj_rele_direct(const void *cop)
 {
         v8plus::ObjectWrap *op = v8plus::ObjectWrap::objlookup(cop);
         op->public_Unref();
 }