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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_COUNTERS_INL_H_
#define V8_COUNTERS_INL_H_
#include "src/counters.h"
namespace v8 {
namespace internal {
void RuntimeCallTimer::Start(RuntimeCallCounter* counter,
RuntimeCallTimer* parent) {
DCHECK(!IsStarted());
counter_ = counter;
parent_.SetValue(parent);
if (FLAG_runtime_stats ==
v8::tracing::TracingCategoryObserver::ENABLED_BY_SAMPLING) {
return;
}
base::TimeTicks now = Now();
if (parent) parent->Pause(now);
Resume(now);
DCHECK(IsStarted());
}
void RuntimeCallTimer::Pause(base::TimeTicks now) {
DCHECK(IsStarted());
elapsed_ += (now - start_ticks_);
start_ticks_ = base::TimeTicks();
}
void RuntimeCallTimer::Resume(base::TimeTicks now) {
DCHECK(!IsStarted());
start_ticks_ = now;
}
RuntimeCallTimer* RuntimeCallTimer::Stop() {
if (!IsStarted()) return parent();
base::TimeTicks now = Now();
Pause(now);
counter_->Increment();
CommitTimeToCounter();
RuntimeCallTimer* parent_timer = parent();
if (parent_timer) {
parent_timer->Resume(now);
}
return parent_timer;
}
void RuntimeCallTimer::CommitTimeToCounter() {
counter_->Add(elapsed_);
elapsed_ = base::TimeDelta();
}
bool RuntimeCallTimer::IsStarted() { return start_ticks_ != base::TimeTicks(); }
base::TimeTicks RuntimeCallTimer::Now() {
return base::TimeTicks::HighResolutionNow();
}
RuntimeCallTimerScope::RuntimeCallTimerScope(
Isolate* isolate, RuntimeCallStats::CounterId counter_id) {
if (V8_UNLIKELY(FLAG_runtime_stats)) {
Initialize(isolate->counters()->runtime_call_stats(), counter_id);
}
}
RuntimeCallTimerScope::RuntimeCallTimerScope(
HeapObject* heap_object, RuntimeCallStats::CounterId counter_id) {
RuntimeCallTimerScope(heap_object->GetIsolate(), counter_id);
}
RuntimeCallTimerScope::RuntimeCallTimerScope(
RuntimeCallStats* stats, RuntimeCallStats::CounterId counter_id) {
if (V8_UNLIKELY(FLAG_runtime_stats)) {
Initialize(stats, counter_id);
}
}
} // namespace internal
} // namespace v8
#endif // V8_COUNTERS_INL_H_
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