johnmccutchan@google.com
420aa94c56
BUG= R=asiva@google.com Review URL: https://codereview.chromium.org//864173008 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@43623 260f80e4-7a28-3924-810f-c04153c831b5
45 lines
1013 B
C++
45 lines
1013 B
C++
// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef VM_SCOPE_TIMER_H_
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#define VM_SCOPE_TIMER_H_
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namespace dart {
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// Simple utility class for timing a block of code.
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class ScopeTimer : public ValueObject {
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public:
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explicit ScopeTimer(const char* name, bool enabled = true)
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: enabled_(enabled),
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name_(name) {
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if (!enabled_) {
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return;
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}
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start_ = OS::GetCurrentTimeMicros();
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}
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int64_t GetElapsed() const {
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int64_t end = OS::GetCurrentTimeMicros();
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ASSERT(end >= start_);
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return end - start_;
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}
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~ScopeTimer() {
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if (!enabled_) {
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return;
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}
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int64_t elapsed = GetElapsed();
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OS::Print("%s took %" Pd64 " micros.\n", name_, elapsed);
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}
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private:
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const bool enabled_;
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const char* name_;
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int64_t start_;
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};
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} // namespace dart
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#endif // VM_SCOPE_TIMER_H_
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