third_party/WebKit/Source/core/dom/Microtask.cpp

   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/ScriptForbiddenScope.h"
  37 #include "platform/Task.h"
  38 #include "public/platform/WebTaskRunner.h"
  39 #include <v8.h>
  40
  41 namespace blink {
  42
  43 void Microtask::performCheckpoint(v8::Isolate* isolate)
  44 {
  45     V8PerIsolateData* isolateData = V8PerIsolateData::from(isolate);
  46     ASSERT(isolateData);
  47     if (isolateData->recursionLevel() || isolateData->performingMicrotaskCheckpoint() || isolateData->destructionPending() || ScriptForbiddenScope::isScriptForbidden())
  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
  58 bool Microtask::performingCheckpoint(v8::Isolate* isolate)
  59 {
  60     return V8PerIsolateData::from(isolate)->performingMicrotaskCheckpoint();
  61 }
  62
  63 static void microtaskFunctionCallback(void* data)
  64 {
  65     OwnPtr<WebTaskRunner::Task> task = adoptPtr(static_cast<WebTaskRunner::Task*>(data));
  66     task->run();
  67 }
  68
  69 void Microtask::enqueueMicrotask(PassOwnPtr<WebTaskRunner::Task> callback)
  70 {
  71     v8::Isolate* isolate = v8::Isolate::GetCurrent();
  72     isolate->EnqueueMicrotask(&microtaskFunctionCallback, callback.leakPtr());
  73 }
  74
  75 void Microtask::enqueueMicrotask(PassOwnPtr<Closure> callback)
  76 {
  77     enqueueMicrotask(adoptPtr(new Task(callback)));
  78 }
  79
  80 } // namespace blink