exposing some methods from objects.h (alternative to counters)

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index a6c238c23a21a853af476346a6f79e9c45298aae..e795b20b9c3c8011fd712cc1c9fce27002e3d738 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -12476,6 +12476,28 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_IS_VAR) {
 }
 
 

[Yang, 2011/06/30 08:54:49]

I hope adding yet another macro is alright. Saves a lot of repetitive code.

[danno, 2011/06/30 17:24:04]

The macro is OK.

I would prefer to make this specific to the elements type for now.
Call the macro ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION that are of the form that
supports a definition list of the following form:

ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastElements);
ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastDoubleElements);
....

+#define OBJECT_HAS(Name)                                  \
+  RUNTIME_FUNCTION(MaybeObject*, Runtime_Object##Name) {  \
+    CONVERT_CHECKED(JSObject, obj, args[0]);              \
+    return isolate->heap()->ToBoolean(obj->Name());       \
+  }
+
+OBJECT_HAS(HasFastElements)
+OBJECT_HAS(HasFastDoubleElements)
+OBJECT_HAS(HasDictionaryElements)
+OBJECT_HAS(HasExternalPixelElements)
+OBJECT_HAS(HasExternalArrayElements)
+OBJECT_HAS(HasExternalByteElements)
+OBJECT_HAS(HasExternalUnsignedByteElements)
+OBJECT_HAS(HasExternalShortElements)
+OBJECT_HAS(HasExternalUnsignedShortElements)
+OBJECT_HAS(HasExternalIntElements)
+OBJECT_HAS(HasExternalUnsignedIntElements)
+OBJECT_HAS(HasExternalFloatElements)
+OBJECT_HAS(HasExternalDoubleElements)
+
+#undef OBJECT_HAS
+
 // ----------------------------------------------------------------------------
 // Implementation of Runtime