1/*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer
12 *    in the documentation and/or other materials provided with the
13 *    distribution.
14 * 3. Neither the name of Google Inc. nor the names of its contributors
15 *    may be used to endorse or promote products derived from this
16 *    software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "core/dom/Microtask.h"
33
34#include "bindings/core/v8/V8PerIsolateData.h"
35#include "bindings/core/v8/V8RecursionScope.h"
36#include "platform/Task.h"
37#include "public/platform/WebThread.h"
38#include <v8.h>
39
40namespace blink {
41
42void Microtask::performCheckpoint()
43{
44    v8::Isolate* isolate = v8::Isolate::GetCurrent();
45    V8PerIsolateData* isolateData = V8PerIsolateData::from(isolate);
46    ASSERT(isolateData);
47    if (isolateData->recursionLevel() || isolateData->performingMicrotaskCheckpoint() || isolateData->destructionPending())
48        return;
49    isolateData->setPerformingMicrotaskCheckpoint(true);
50    {
51        // Ensure that end-of-task-or-microtask actions are performed.
52        V8RecursionScope recursionScope(isolate);
53        isolate->RunMicrotasks();
54    }
55    isolateData->setPerformingMicrotaskCheckpoint(false);
56}
57
58bool Microtask::performingCheckpoint(v8::Isolate* isolate)
59{
60    return V8PerIsolateData::from(isolate)->performingMicrotaskCheckpoint();
61}
62
63static void microtaskFunctionCallback(void* data)
64{
65    OwnPtr<WebThread::Task> task = adoptPtr(static_cast<WebThread::Task*>(data));
66    task->run();
67}
68
69void Microtask::enqueueMicrotask(PassOwnPtr<WebThread::Task> callback)
70{
71    v8::Isolate* isolate = v8::Isolate::GetCurrent();
72    isolate->EnqueueMicrotask(&microtaskFunctionCallback, callback.leakPtr());
73}
74
75void Microtask::enqueueMicrotask(const Closure& callback)
76{
77    enqueueMicrotask(adoptPtr(new Task(callback)));
78}
79
80} // namespace blink
81