- Account for number of pending tasks in old-space collections.

runtime/vm/thread.h

 // Copyright (c) 2012, 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.
 
 #ifndef VM_THREAD_H_
 #define VM_THREAD_H_
 
 #include "platform/globals.h"
 
 // Declare the OS-specific types ahead of defining the generic classes.
 #if defined(TARGET_OS_ANDROID)
 #include "vm/thread_android.h"
 #elif defined(TARGET_OS_LINUX)
 #include "vm/thread_linux.h"
 #elif defined(TARGET_OS_MACOS)
 #include "vm/thread_macos.h"
 #elif defined(TARGET_OS_WINDOWS)
 #include "vm/thread_win.h"
 #else
 #error Unknown target os.
 #endif
 
 namespace dart {
 
+class Isolate;
+
 class Thread {
  public:
   static ThreadLocalKey kUnsetThreadLocalKey;
   static ThreadId kInvalidThreadId;
 
   typedef void (*ThreadStartFunction) (uword parameter);
 
   // Start a thread running the specified function. Returns 0 if the
   // thread started successfuly and a system specific error code if
   // the thread failed to start.
@@ skipping 16 matching lines @@
 
 class Mutex {
  public:
   Mutex();
   ~Mutex();
 
   void Lock();
   bool TryLock();
   void Unlock();
 
+#if defined(DEBUG)
+  Isolate* Owner() const { return owner_; }
+#endif  // defined(DEBUG)
+
  private:
   MutexData data_;
+#if defined(DEBUG)
+  Isolate* owner_;
+#endif  // defined(DEBUG)
 
   DISALLOW_COPY_AND_ASSIGN(Mutex);
 };
 
 
 class Monitor {
  public:
   enum WaitResult {
     kNotified,
     kTimedOut
@@ skipping 19 matching lines @@
   MonitorData data_;  // OS-specific data.
 
   DISALLOW_COPY_AND_ASSIGN(Monitor);
 };
 
 
 }  // namespace dart
 
 
 #endif  // VM_THREAD_H_