Sampling profiler

runtime/platform/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 PLATFORM_THREAD_H_
 #define PLATFORM_THREAD_H_
 
 #include "platform/globals.h"
 
 // Declare the OS-specific types ahead of defining the generic classes.
@@ skipping 22 matching lines @@
   // the thread failed to start.
   static int Start(ThreadStartFunction function, uword parameters);
 
   static ThreadLocalKey CreateThreadLocal();
   static void DeleteThreadLocal(ThreadLocalKey key);
   static uword GetThreadLocal(ThreadLocalKey key) {
     return ThreadInlineImpl::GetThreadLocal(key);
   }
   static void SetThreadLocal(ThreadLocalKey key, uword value);
   static intptr_t GetMaxStackSize();
+  static ThreadId GetCurrentThreadId();
+  static void GetThreadCpuUsage(ThreadId thread_id, int64_t* cpu_usage);
 };
 
 
 class Mutex {
  public:
   Mutex();
   ~Mutex();
 
   void Lock();
   bool TryLock();
@@ skipping 16 matching lines @@
   static const int64_t kNoTimeout = 0;
 
   Monitor();
   ~Monitor();
 
   void Enter();
   void Exit();
 
   // Wait for notification or timeout.
   WaitResult Wait(int64_t millis);
+  WaitResult WaitMicros(int64_t micros);
 
   // Notify waiting threads.
   void Notify();
   void NotifyAll();
 
  private:
   MonitorData data_;  // OS-specific data.
 
   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
 
 
 #endif  // PLATFORM_THREAD_H_