Sampling profiler

runtime/platform/thread.h

Index: runtime/platform/thread.h
diff --git a/runtime/platform/thread.h b/runtime/platform/thread.h
index 4b19f8b5286755b6274632be6481624b898e639b..02ad51e74d831ac63889e09da046a03e1451c3b7 100644
--- a/runtime/platform/thread.h
+++ b/runtime/platform/thread.h
@@ -40,6 +40,8 @@ class Thread {
   }
   static void SetThreadLocal(ThreadLocalKey key, uword value);
   static intptr_t GetMaxStackSize();
+  static ThreadId GetCurrentThreadId();
+  static void GetThreadCpuUsage(ThreadId thread_id, int64_t* cpu_usage);
 };
 
 
@@ -76,6 +78,7 @@ class Monitor {
 
   // Wait for notification or timeout.
   WaitResult Wait(int64_t millis);
+  WaitResult WaitMicros(int64_t micros);
 
   // Notify waiting threads.
   void Notify();
@@ -87,6 +90,59 @@ class Monitor {
   DISALLOW_COPY_AND_ASSIGN(Monitor);
 };
 
+
+class ScopedMutex {
+ public:
+  explicit ScopedMutex(Mutex* mutex) : mutex_(mutex) {
+    ASSERT(mutex_ != NULL);
+    mutex_->Lock();
+  }
+
+  ~ScopedMutex() {
+    mutex_->Unlock();
+  }
+
+ private:
+  Mutex* const mutex_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedMutex);
+};
+
+
+class ScopedMonitor {
+ public:
+  explicit ScopedMonitor(Monitor* monitor) : monitor_(monitor) {
+    ASSERT(monitor_ != NULL);
+    monitor_->Enter();
+  }
+
+  ~ScopedMonitor() {
+    monitor_->Exit();
+  }
+
+  Monitor::WaitResult Wait(int64_t millis = dart::Monitor::kNoTimeout) {
+    return monitor_->Wait(millis);
+  }
+
+  Monitor::WaitResult WaitMicros(int64_t micros = dart::Monitor::kNoTimeout) {
+    return monitor_->WaitMicros(micros);
+  }
+
+  void Notify() {
+    monitor_->Notify();
+  }
+
+  void NotifyAll() {
+    monitor_->NotifyAll();
+  }
+
+ private:
+  Monitor* const monitor_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedMonitor);
+};
+
+
 }  // namespace dart