| /* |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * 3. Neither the name of Google Inc. nor the names of its contributors |
| * may be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_MICROTASK_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_MICROTASK_H_ |
| |
| #include "third_party/blink/renderer/platform/platform_export.h" |
| #include "third_party/blink/renderer/platform/wtf/allocator.h" |
| #include "third_party/blink/renderer/platform/wtf/functional.h" |
| #include "v8/include/v8.h" |
| |
| namespace blink { |
| |
| // C++ calls into script contexts which are "owned" by blink (created in a |
| // process where WebKit.cpp initializes v8) must declare their type: |
| // |
| // 1. Calls into page/author script from a frame |
| // 2. Calls into page/author script from a worker |
| // 3. Calls into internal script (typically setup/teardown work) |
| // |
| // Debug-time checking of this is enforced via v8::MicrotasksScope. |
| // |
| // Calls of type (1) should generally go through ScriptController, as inspector |
| // instrumentation is needed. ScriptController allocates V8RecursionScope for |
| // you. |
| // |
| // Calls of type (2) should always stack-allocate a |
| // v8::MicrotasksScope(kRunMicrtoasks) in the same block as the call into |
| // script. |
| // |
| // Calls of type (3) should stack allocate a |
| // v8::MicrotasksScope(kDoNotRunMicrotasks) -- this skips work that is spec'd to |
| // happen at the end of the outer-most script stack frame of calls into page |
| // script: |
| // http://www.whatwg.org/specs/web-apps/current-work/#perform-a-microtask-checkpoint |
| class PLATFORM_EXPORT Microtask { |
| STATIC_ONLY(Microtask); |
| |
| public: |
| static void PerformCheckpoint(v8::Isolate*); |
| |
| // TODO(jochen): Make all microtasks pass in the ScriptState they want to be |
| // executed in. Until then, all microtasks have to keep track of their |
| // ScriptState themselves. |
| static void EnqueueMicrotask(base::OnceClosure); |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_MICROTASK_H_ |
