Use the ThreadPool for all isolates and native ports. Previously,

runtime/vm/isolate.h

Index: runtime/vm/isolate.h
===================================================================
--- runtime/vm/isolate.h	(revision 5987)
+++ runtime/vm/isolate.h	(working copy)
@@ -32,7 +32,6 @@
 class StubCode;
 class Zone;
 
-
 class Isolate {
  public:
   ~Isolate();
@@ -206,8 +205,7 @@
   // value to trigger interrupts.
   uword stack_limit() const { return stack_limit_; }
 
-  // The true stack limit for this isolate.  This does not change
-  // after isolate initialization.
+  // The true stack limit for this isolate.
   uword saved_stack_limit() const { return saved_stack_limit_; }
 
   enum {
@@ -223,9 +221,6 @@
   MessageHandler* message_handler() const { return message_handler_; }
   void set_message_handler(MessageHandler* value) { message_handler_ = value; }
 
-  // Returns null on success, a RawError on failure.
-  RawError* StandardRunLoop();
-
   intptr_t ast_node_id() const { return ast_node_id_; }
   void set_ast_node_id(int value) { ast_node_id_ = value; }
 
@@ -295,6 +290,28 @@
   DISALLOW_COPY_AND_ASSIGN(Isolate);
 };
 
+class SetIsolateScope {
+ public:
+  explicit SetIsolateScope(Isolate* new_isolate)
+      : new_isolate_(new_isolate), saved_isolate_(Isolate::Current()) {
+    Isolate::SetCurrent(new_isolate);
+    if (new_isolate) {

[Ivan Posva, 2012/04/08 22:58:27]

if (new_isolate != NULL) {

[turnidge, 2012/04/11 19:37:16]

Done.

+      new_isolate->SetStackLimitFromCurrentTOS(reinterpret_cast<uword>(this));
+    }
+  }
+
+  ~SetIsolateScope() {
+    ASSERT(Isolate::Current() == new_isolate_);
+    Isolate::SetCurrent(saved_isolate_);
+  }
+
+ private:
+  Isolate* new_isolate_;
+  Isolate* saved_isolate_;
+
+  DISALLOW_COPY_AND_ASSIGN(SetIsolateScope);
+};
+
 }  // namespace dart
 
 #endif  // VM_ISOLATE_H_