Heartbeat implementation of dart:mirrors.

runtime/vm/bootstrap.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/bootstrap.h"
 
 #include "include/dart_api.h"
 
 #include "vm/compiler.h"
 #include "vm/dart_api_impl.h"
@@ skipping 20 matching lines @@
                                                  Heap::kOld));
   const String& src = String::Handle(String::New(corelib_impl_source_,
                                                  Heap::kOld));
 
   const Script& result =
       Script::Handle(Script::New(url, src, RawScript::kSource));
   return result.raw();
 }
 
 
+static RawObject* InitLibrary(const char* url_str,
+                             const char* source_str) {
+  const String& url = String::Handle(String::NewSymbol(url_str));
+  const String& source = String::Handle(String::New(source_str,
+                                                    Heap::kOld));
+  const Library& lib = Library::Handle(Library::New(url));
+  lib.Register();
+  const Script& script =
+      Script::Handle(Script::New(url, source, RawScript::kSource));
+  const Error& error = Error::Handle(Bootstrap::Compile(lib, script));
+  if (!error.IsNull()) {
+    return error.raw();
+  } else {
+    return lib.raw();
+  }
+}
+
+
+RawError* Bootstrap::InitAdditionalLibraries() {
+  Object& result = Object::Handle();
+  result = InitLibrary("dart:mirrors", mirrors_source_);
+  if (result.IsError()) {
+    Error& error = Error::Handle();
+    error ^= result.raw();
+    return error.raw();

[siva, 2012/02/18 01:25:55]

Instead of defining functions to return RawError* can we just define them to
return RawObject* that way we won't have to go through this hoop of creating yet
another handle, assigning and returning, we could just do:
if (result.IsError()) {
  return result.raw();
}
Library& lib = Library::Handle();
lib ^= result.raw();
.....
return Object::null();

[turnidge, 2012/03/07 20:00:14]

This function went away in refactor.  Point taken though.

+  } else {
+    Library& lib = Library::Handle();
+    lib ^= result.raw();
+    Isolate::Current()->object_store()->set_mirrors_library(lib);
+  }
+  return Error::null();
+}
+
+
 RawError* Bootstrap::Compile(const Library& library, const Script& script) {
   if (FLAG_print_bootstrap) {
     OS::Print("Bootstrap source '%s':\n%s\n",
         String::Handle(script.url()).ToCString(),
         String::Handle(script.source()).ToCString());
   }
   library.SetLoadInProgress();
   const Error& error = Error::Handle(Compiler::Compile(library, script));
   if (error.IsNull()) {
     library.SetLoaded();
+  } else {
+    library.SetLoadError();
   }
   return error.raw();
 }
 
 }  // namespace dart