- Clarify the order of setting the interrupt bit and posting a message in

runtime/vm/code_generator.cc

 // Copyright (c) 2013, 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/code_generator.h"
 
 #include "vm/assembler.h"
 #include "vm/ast.h"
 #include "vm/code_patcher.h"
 #include "vm/compiler.h"
@@ skipping 1359 matching lines @@
       const UnwindError& error = UnwindError::Handle(UnwindError::New(msg));
       Exceptions::PropagateError(error);
       UNREACHABLE();
     }
   }
   if ((interrupt_bits & Isolate::kApiInterrupt) != 0) {
     // Signal isolate interrupt event.
     Debugger::SignalIsolateInterrupted();
 
     Dart_IsolateInterruptCallback callback = isolate->InterruptCallback();
-    if (callback) {
+    if (callback != NULL) {
       if ((*callback)()) {
         return;
       } else {
         // TODO(turnidge): Unwind the stack.
         UNIMPLEMENTED();
       }
     }
   }
 
   if ((stack_overflow_flags & Isolate::kOsrRequest) != 0) {
@@ skipping 457 matching lines @@
   const intptr_t elm_size = old_data.ElementSizeInBytes();
   const TypedData& new_data =
       TypedData::Handle(TypedData::New(cid, new_size, Heap::kOld));
   TypedData::Copy(new_data, 0, old_data, 0, old_size * elm_size);
   typed_data_cell.SetAt(0, new_data);
   arguments.SetReturn(new_data);
 }
 
 
 }  // namespace dart