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| 1 // Copyright 2013 the V8 project authors. All rights reserved. | |
| 2 // Redistribution and use in source and binary forms, with or without | |
| 3 // modification, are permitted provided that the following conditions are | |
| 4 // met: | |
| 5 // | |
| 6 // * Redistributions of source code must retain the above copyright | |
| 7 // notice, this list of conditions and the following disclaimer. | |
| 8 // * Redistributions in binary form must reproduce the above | |
| 9 // copyright notice, this list of conditions and the following | |
| 10 // disclaimer in the documentation and/or other materials provided | |
| 11 // with the distribution. | |
| 12 // * Neither the name of Google Inc. nor the names of its | |
| 13 // contributors may be used to endorse or promote products derived | |
| 14 // from this software without specific prior written permission. | |
| 15 // | |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 | |
| 28 #include "marking-thread.h" | |
| 29 | |
| 30 #include "v8.h" | |
| 31 | |
| 32 #include "isolate.h" | |
| 33 #include "v8threads.h" | |
| 34 | |
| 35 namespace v8 { | |
| 36 namespace internal { | |
| 37 | |
| 38 MarkingThread::MarkingThread(Isolate* isolate) | |
| 39 : Thread("MarkingThread"), | |
| 40 isolate_(isolate), | |
| 41 heap_(isolate->heap()), | |
| 42 start_marking_semaphore_(0), | |
| 43 end_marking_semaphore_(0), | |
| 44 stop_semaphore_(0) { | |
| 45 NoBarrier_Store(&stop_thread_, static_cast<AtomicWord>(false)); | |
| 46 id_ = NoBarrier_AtomicIncrement(&id_counter_, 1); | |
| 47 } | |
| 48 | |
| 49 | |
| 50 Atomic32 MarkingThread::id_counter_ = -1; | |
| 51 | |
| 52 | |
| 53 void MarkingThread::Run() { | |
| 54 Isolate::SetIsolateThreadLocals(isolate_, NULL); | |
| 55 DisallowHeapAllocation no_allocation; | |
| 56 DisallowHandleAllocation no_handles; | |
| 57 DisallowHandleDereference no_deref; | |
| 58 | |
| 59 while (true) { | |
| 60 start_marking_semaphore_.Wait(); | |
| 61 | |
| 62 if (Acquire_Load(&stop_thread_)) { | |
| 63 stop_semaphore_.Signal(); | |
| 64 return; | |
| 65 } | |
| 66 | |
| 67 end_marking_semaphore_.Signal(); | |
| 68 } | |
| 69 } | |
| 70 | |
| 71 | |
| 72 void MarkingThread::Stop() { | |
| 73 Release_Store(&stop_thread_, static_cast<AtomicWord>(true)); | |
| 74 start_marking_semaphore_.Signal(); | |
| 75 stop_semaphore_.Wait(); | |
| 76 Join(); | |
| 77 } | |
| 78 | |
| 79 | |
| 80 void MarkingThread::StartMarking() { | |
| 81 start_marking_semaphore_.Signal(); | |
| 82 } | |
| 83 | |
| 84 | |
| 85 void MarkingThread::WaitForMarkingThread() { | |
| 86 end_marking_semaphore_.Wait(); | |
| 87 } | |
| 88 | |
| 89 } } // namespace v8::internal | |
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Chromium Code Reviews
Issue 25260003:
Remove parallel marking support. (Closed)
Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge