Split profiler.cc into profiler.cc and profiler_service.cc

runtime/vm/scope_timer.h

+// Copyright (c) 2015, 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_SCOPE_TIMER_H_
+#define VM_SCOPE_TIMER_H_
+
+namespace dart {
+
+// Simple utility class for timing a block of code.
+class ScopeTimer : public ValueObject {
+ public:
+  explicit ScopeTimer(const char* name, bool enabled = true)

[siva, 2015/02/09 23:19:59]

constructor has two params, is 'explicit' still needed?

[Cutch, 2015/02/09 23:22:07]

Acknowledged.

+      : enabled_(enabled),
+        name_(name) {
+    if (!enabled_)     {
+      return;
+    }
+    start_ = OS::GetCurrentTimeMicros();
+  }
+
+  int64_t GetElapsed() const {
+    int64_t end = OS::GetCurrentTimeMicros();
+    ASSERT(end >= start_);
+    return end - start_;
+  }
+
+  ~ScopeTimer() {
+    if (!enabled_) {
+      return;
+    }
+    int64_t elapsed = GetElapsed();
+    OS::Print("%s took %" Pd64 " micros.\n", name_, elapsed);
+  }
+
+ private:
+  const bool enabled_;
+  const char* name_;
+  int64_t start_;

[siva, 2015/02/09 23:19:59]

Missing the boiler plate DISALLOW stuff.

[Cutch, 2015/02/09 23:22:07]

Acknowledged.

+};
+
+}  // namespace dart
+
+#endif  // VM_SCOPE_TIMER_H_