Introduce Dart_SetVMFlags API function.

runtime/vm/dart_api_impl.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 "include/dart_api.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart.h"
@@ skipping 445 matching lines @@
 DART_EXPORT Dart_Handle Dart_MakePersistentHandle(Dart_Handle object) {
   UNIMPLEMENTED();
   return NULL;
 }
 
 
 // --- Initialization and Globals ---
 
 
 // TODO(iposva): This is a placeholder for the eventual external Dart API.
-DART_EXPORT bool Dart_Initialize(int argc,
-                                 const char** argv,
-                                 Dart_IsolateInitCallback callback) {
-  return Dart::InitOnce(argc, argv, callback);
+DART_EXPORT bool Dart_Initialize(Dart_IsolateInitCallback callback) {
+  return Dart::InitOnce(callback);
 }
 
+DART_EXPORT void Dart_SetVMFlags(int argc, const char** argv) {
+  Flags::ProcessCommandLineFlags(argc, argv);

[siva, 2011/11/29 19:08:43]

Currently we ensure that Dart_Initialize is called only once and hence
Flags::ProcessCommandLineFlags is also called only once.

In the new scheme it is possible to call Dart_SetVMFlags multiple times we
should protect against that and we should also ensure that Dart_SetVMFlags is
called before Dart_Initialize is called.

[podivilov, 2011/11/30 11:50:36]

Done.

+}
 
 DART_EXPORT bool Dart_IsVMFlagSet(const char* flag_name) {
   if (Flags::Lookup(flag_name) != NULL) {
     return true;
   }
   return false;
 }
 
 
 // --- Isolates ---
@@ skipping 1815 matching lines @@
     }
     delete debug_region;
   } else {
     *buffer = NULL;
     *buffer_size = 0;
   }
 }
 
 
 }  // namespace dart