Implement automatic loading of dart:core_native_fields library

vm/object.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/object.h"
 
 #include "vm/assembler.h"
 #include "vm/assert.h"
 #include "vm/bigint_operations.h"
 #include "vm/bootstrap.h"
@@ skipping 548 matching lines @@
   // Add the preallocated classes to the list of classes to be finalized.
   ClassFinalizer::AddPendingClasses(pending_classes);
 
   // Allocate pre-initialized values.
   Bool& bool_value = Bool::Handle();
   bool_value = Bool::New(true);
   object_store->set_true_value(bool_value);
   bool_value = Bool::New(false);
   object_store->set_false_value(bool_value);
 
+  // Setup some default native field classes which can be extended for
+  // specifying native fields in dart classes.
+  Library::InitNativeWrappersLibrary(isolate);
+  ASSERT(isolate->object_store()->native_wrappers_library() != Library::null());
+
   // Finish the initialization by compiling the bootstrap scripts containing the
   // base interfaces and the implementation of the internal classes.
   Bootstrap::Compile(core_lib, script);
   Bootstrap::Compile(core_impl_lib, impl_script);
 
   Bootstrap::SetupNativeResolver();
 
   // Remove the Object superclass cycle by setting the super type to null (not
   // to the type of null).
   cls = object_store->object_class();
@@ skipping 3544 matching lines @@
   const Library& core_impl_lib =
       Library::Handle(Library::NewLibraryHelper(core_impl_lib_url, false));
   isolate->object_store()->set_core_impl_library(core_impl_lib);
   core_impl_lib.Register();
   core_lib.AddImport(core_impl_lib);
   core_impl_lib.AddImport(core_lib);
   isolate->object_store()->set_root_library(Library::Handle());
 }
 
 
+void Library::InitNativeWrappersLibrary(Isolate* isolate) {
+  static const int kNumNativeWrappersClasses = 4;
+  ASSERT(kNumNativeWrappersClasses > 0 && kNumNativeWrappersClasses < 10);
+  const String& native_flds_lib_url = String::Handle(
+      String::NewSymbol("dart:nativewrappers"));
+  Library& native_flds_lib = Library::Handle(
+      Library::NewLibraryHelper(native_flds_lib_url, false));
+  native_flds_lib.Register();
+  isolate->object_store()->set_native_wrappers_library(native_flds_lib);
+  static const char* const kNativeWrappersClass = "NativeFieldWrapperClass";
+  static const int kNameLength = 25;
+  ASSERT(kNameLength == (strlen(kNativeWrappersClass) + 1 + 1));
+  char name_buffer[kNameLength];
+  String& cls_name = String::Handle();
+  for (int fld_cnt = 1; fld_cnt <= kNumNativeWrappersClasses; fld_cnt++) {
+    OS::SNPrint(name_buffer,
+                kNameLength,
+                "%s%d",
+                kNativeWrappersClass,
+                fld_cnt);
+    cls_name = String::NewSymbol(name_buffer);
+    Class::NewNativeWrapper(&native_flds_lib, cls_name, fld_cnt);
+  }
+}
+
+
 RawLibrary* Library::LookupLibrary(const String &url) {
   Library& lib = Library::Handle();
   String& lib_url = String::Handle();
   lib = Isolate::Current()->object_store()->registered_libraries();
   while (!lib.IsNull()) {
     lib_url = lib.url();
     if (lib_url.Equals(url)) {
       return lib.raw();
     }
     lib = lib.next_registered();
@@ skipping 50 matching lines @@
 RawLibrary* Library::CoreLibrary() {
   return Isolate::Current()->object_store()->core_library();
 }
 
 
 RawLibrary* Library::CoreImplLibrary() {
   return Isolate::Current()->object_store()->core_impl_library();
 }
 
 
+RawLibrary* Library::NativeWrappersLibrary() {
+  return Isolate::Current()->object_store()->native_wrappers_library();
+}
+
+
 const char* Library::ToCString() const {
   const char* kFormat = "Library:'%s'";
   const String& name = String::Handle(url());
   intptr_t len = OS::SNPrint(NULL, 0, kFormat, name.ToCString()) + 1;
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len));
   OS::SNPrint(chars, len, kFormat, name.ToCString());
   return chars;
 }
 
@@ skipping 2815 matching lines @@
   const String& str = String::Handle(pattern());
   const char* format = "JSRegExp: pattern=%s flags=%s";
   intptr_t len = OS::SNPrint(NULL, 0, format, str.ToCString(), Flags());
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len + 1));
   OS::SNPrint(chars, (len + 1), format, str.ToCString(), Flags());
   return chars;
 }
 
 }  // namespace dart