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| 1 /* | |
| 2 * Copyright (C) 2014 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 are | |
| 6 * met: | |
| 7 * | |
| 8 * * Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * * Redistributions in binary form must reproduce the above | |
| 11 * copyright notice, this list of conditions and the following disclaimer | |
| 12 * in the documentation and/or other materials provided with the | |
| 13 * distribution. | |
| 14 * * Neither the name of Google Inc. nor the names of its | |
| 15 * contributors may be used to endorse or promote products derived from | |
| 16 * this 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 #ifndef PendingGCRunner_h | |
| 32 #define PendingGCRunner_h | |
| 33 | |
| 34 #include "platform/heap/ThreadState.h" | |
| 35 #include "public/platform/WebTaskRunner.h" | |
| 36 #include "public/platform/WebThread.h" | |
| 37 #include "public/platform/WebTraceLocation.h" | |
| 38 | |
| 39 namespace blink { | |
| 40 | |
| 41 class PendingGCRunner : public WebThread::TaskObserver { | |
| 42 public: | |
| 43 PendingGCRunner() : m_nesting(0) { } | |
| 44 | |
| 45 ~PendingGCRunner() | |
| 46 { | |
| 47 // m_nesting can be 1 if this was unregistered in a task and | |
| 48 // didProcessTask was not called. | |
| 49 ASSERT(!m_nesting || m_nesting == 1); | |
| 50 } | |
| 51 | |
| 52 virtual void willProcessTask() | |
| 53 { | |
| 54 m_nesting++; | |
| 55 } | |
| 56 | |
| 57 virtual void didProcessTask() | |
| 58 { | |
| 59 // In the production code WebKit::initialize is called from inside the | |
| 60 // message loop so we can get didProcessTask() without corresponding | |
| 61 // willProcessTask once. This is benign. | |
| 62 if (m_nesting) | |
| 63 m_nesting--; | |
| 64 | |
| 65 ThreadState* state = ThreadState::current(); | |
| 66 state->safePoint(m_nesting ? BlinkGC::HeapPointersOnStack : BlinkGC::NoH
eapPointersOnStack); | |
| 67 } | |
| 68 | |
| 69 private: | |
| 70 int m_nesting; | |
| 71 }; | |
| 72 | |
| 73 } // namespace blink | |
| 74 | |
| 75 #endif | |
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Chromium Code Reviews
Issue 1419513007:
Oilpan: Introduce GCTaskRunner (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master