// Copyright 2017 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.

#include <stdlib.h>

#include "src/v8.h"

#include "src/heap/concurrent-marking.h"
#include "src/heap/heap-inl.h"
#include "src/heap/heap.h"
#include "src/heap/worklist.h"
#include "test/cctest/cctest.h"
#include "test/cctest/heap/heap-utils.h"

namespace v8 {
namespace internal {

void PublishSegment(ConcurrentMarking::MarkingWorklist* worklist,
                    HeapObject* object) {
  for (int i = 0; i <= ConcurrentMarking::MarkingWorklist::kSegmentCapacity;
       i++) {
    worklist->Push(0, object);
  }
  CHECK(worklist->Pop(0, &object));
}

TEST(ConcurrentMarking) {
  if (!i::FLAG_concurrent_marking) return;
  CcTest::InitializeVM();
  Heap* heap = CcTest::heap();
  ConcurrentMarking::MarkingWorklist shared, bailout;
  ConcurrentMarking* concurrent_marking =
      new ConcurrentMarking(heap, &shared, &bailout);
  PublishSegment(&shared, heap->undefined_value());
  concurrent_marking->Start();
  concurrent_marking->EnsureCompleted();
  delete concurrent_marking;
}

TEST(ConcurrentMarkingWaiting) {
  if (!i::FLAG_concurrent_marking) return;
  CcTest::InitializeVM();
  Heap* heap = CcTest::heap();
  ConcurrentMarking::MarkingWorklist shared, bailout;
  ConcurrentMarking* concurrent_marking =
      new ConcurrentMarking(heap, &shared, &bailout);
  PublishSegment(&shared, heap->undefined_value());
  concurrent_marking->Start();
  while (!concurrent_marking->AllTasksWaitingForTesting()) {
    // Busy wait.
  }
  PublishSegment(&shared, heap->undefined_value());
  concurrent_marking->NotifyWaitingTasks();
  concurrent_marking->EnsureCompleted();
  delete concurrent_marking;
}

}  // namespace internal
}  // namespace v8