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// Copyright 2013 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * 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.
// * 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.
#include "marking-thread.h"
#include "v8.h"
#include "isolate.h"
#include "v8threads.h"
namespace v8 {
namespace internal {
MarkingThread::MarkingThread(Isolate* isolate)
: Thread("MarkingThread"),
isolate_(isolate),
heap_(isolate->heap()),
start_marking_semaphore_(OS::CreateSemaphore(0)),
end_marking_semaphore_(OS::CreateSemaphore(0)),
stop_semaphore_(OS::CreateSemaphore(0)) {
NoBarrier_Store(&stop_thread_, static_cast<AtomicWord>(false));
id_ = NoBarrier_AtomicIncrement(&id_counter_, 1);
}
Atomic32 MarkingThread::id_counter_ = -1;
void MarkingThread::Run() {
Isolate::SetIsolateThreadLocals(isolate_, NULL);
while (true) {
start_marking_semaphore_->Wait();
if (Acquire_Load(&stop_thread_)) {
stop_semaphore_->Signal();
return;
}
end_marking_semaphore_->Signal();
}
}
void MarkingThread::Stop() {
Release_Store(&stop_thread_, static_cast<AtomicWord>(true));
start_marking_semaphore_->Signal();
stop_semaphore_->Wait();
}
void MarkingThread::StartMarking() {
start_marking_semaphore_->Signal();
}
void MarkingThread::WaitForMarkingThread() {
end_marking_semaphore_->Wait();
}
} } // namespace v8::internal
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