ee2b095a57
BUG=v8:3104 R=hpayer@chromium.org LOG=y Review URL: https://codereview.chromium.org/143803007 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19357 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
// Copyright 2012 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "sweeper-thread.h"
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#include "v8.h"
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#include "isolate.h"
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#include "v8threads.h"
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namespace v8 {
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namespace internal {
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static const int kSweeperThreadStackSize = 64 * KB;
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SweeperThread::SweeperThread(Isolate* isolate)
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: Thread(Thread::Options("v8:SweeperThread", kSweeperThreadStackSize)),
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isolate_(isolate),
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heap_(isolate->heap()),
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collector_(heap_->mark_compact_collector()),
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start_sweeping_semaphore_(0),
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end_sweeping_semaphore_(0),
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stop_semaphore_(0) {
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ASSERT(!FLAG_job_based_sweeping);
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NoBarrier_Store(&stop_thread_, static_cast<AtomicWord>(false));
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}
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void SweeperThread::Run() {
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Isolate::SetIsolateThreadLocals(isolate_, NULL);
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DisallowHeapAllocation no_allocation;
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DisallowHandleAllocation no_handles;
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DisallowHandleDereference no_deref;
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while (true) {
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start_sweeping_semaphore_.Wait();
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if (Acquire_Load(&stop_thread_)) {
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stop_semaphore_.Signal();
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return;
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}
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collector_->SweepInParallel(heap_->old_data_space());
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collector_->SweepInParallel(heap_->old_pointer_space());
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end_sweeping_semaphore_.Signal();
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}
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}
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void SweeperThread::Stop() {
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Release_Store(&stop_thread_, static_cast<AtomicWord>(true));
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start_sweeping_semaphore_.Signal();
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stop_semaphore_.Wait();
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Join();
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}
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void SweeperThread::StartSweeping() {
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start_sweeping_semaphore_.Signal();
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}
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void SweeperThread::WaitForSweeperThread() {
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end_sweeping_semaphore_.Wait();
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}
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int SweeperThread::NumberOfThreads(int max_available) {
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if (!FLAG_concurrent_sweeping && !FLAG_parallel_sweeping) return 0;
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if (FLAG_sweeper_threads > 0) return FLAG_sweeper_threads;
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if (FLAG_concurrent_sweeping) return max_available - 1;
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ASSERT(FLAG_parallel_sweeping);
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return max_available;
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}
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} } // namespace v8::internal
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