1 // Copyright 2012 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 #ifndef V8_SWEEPER_THREAD_H_ 29 #define V8_SWEEPER_THREAD_H_ 30 31 #include "atomicops.h" 32 #include "flags.h" 33 #include "platform.h" 34 #include "v8utils.h" 35 36 #include "spaces.h" 37 38 #include "heap.h" 39 40 namespace v8 { 41 namespace internal { 42 43 class SweeperThread : public Thread { 44 public: 45 explicit SweeperThread(Isolate* isolate); ~SweeperThread()46 ~SweeperThread() {} 47 48 void Run(); 49 void Stop(); 50 void StartSweeping(); 51 void WaitForSweeperThread(); 52 intptr_t StealMemory(PagedSpace* space); 53 54 static int NumberOfThreads(int max_available); 55 56 private: 57 Isolate* isolate_; 58 Heap* heap_; 59 MarkCompactCollector* collector_; 60 Semaphore start_sweeping_semaphore_; 61 Semaphore end_sweeping_semaphore_; 62 Semaphore stop_semaphore_; 63 FreeList free_list_old_data_space_; 64 FreeList free_list_old_pointer_space_; 65 FreeList private_free_list_old_data_space_; 66 FreeList private_free_list_old_pointer_space_; 67 volatile AtomicWord stop_thread_; 68 }; 69 70 } } // namespace v8::internal 71 72 #endif // V8_SWEEPER_THREAD_H_ 73