Service isolate rework

runtime/bin/builtin.cc

Index: runtime/bin/builtin.cc
diff --git a/runtime/bin/builtin.cc b/runtime/bin/builtin.cc
index 723ad54b1fba562c2b7bf5b99b1901d38a282fe8..d94dedeabf503373ad48028f5af8e1352edb700f 100644
--- a/runtime/bin/builtin.cc
+++ b/runtime/bin/builtin.cc
@@ -8,6 +8,7 @@
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
+#include "bin/platform.h"
 
 namespace dart {
 namespace bin {
@@ -19,6 +20,7 @@ Builtin::builtin_lib_props Builtin::builtin_libraries_[] = {
     DartUtils::kIOLibPatchURL, io_patch_paths_, true },
 };
 
+Dart_Port Builtin::load_port_ = ILLEGAL_PORT;
 
 // Patch all the specified patch files in the array 'patch_files' into the
 // library specified in 'library'.
@@ -116,5 +118,26 @@ Dart_Handle Builtin::LoadAndCheckLibrary(BuiltinLibraryId id) {
   return library;
 }
 
+
+void Builtin::SetLoadPort(Dart_Port port) {
+  load_port_ = port;
+  ASSERT(load_port_ != ILLEGAL_PORT);
+  Dart_Handle field_name = DartUtils::NewString("_loadPort");
+  ASSERT(!Dart_IsError(field_name));
+  Dart_Handle builtin_lib =
+      Builtin::LoadAndCheckLibrary(Builtin::kBuiltinLibrary);
+  ASSERT(!Dart_IsError(builtin_lib));
+  Dart_Handle send_port = Dart_GetField(builtin_lib, field_name);
+  ASSERT(!Dart_IsError(send_port));
+  if (!Dart_IsNull(send_port)) {
+    // Already created and set.
+    return;
+  }
+  send_port = Dart_NewSendPort(load_port_);
+  ASSERT(!Dart_IsError(send_port));
+  Dart_Handle result = Dart_SetField(builtin_lib, field_name, send_port);
+  ASSERT(!Dart_IsError(result));
+}
+
 }  // namespace bin
 }  // namespace dart