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-// Copyright 2012 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.
-
-#ifndef V8_OPTIMIZING_COMPILER_THREAD_H_
-#define V8_OPTIMIZING_COMPILER_THREAD_H_
-
-#include "atomicops.h"
-#include "flags.h"
-#include "platform.h"
-#include "unbound-queue.h"
-
-namespace v8 {
-namespace internal {
-
-class HOptimizedGraphBuilder;
-class OptimizingCompiler;
-class SharedFunctionInfo;
-
-class OptimizingCompilerThread : public Thread {
- public:
- explicit OptimizingCompilerThread(Isolate *isolate) :
- Thread("OptimizingCompilerThread"),
-#ifdef DEBUG
- thread_id_(0),
-#endif
- isolate_(isolate),
- stop_semaphore_(OS::CreateSemaphore(0)),
- input_queue_semaphore_(OS::CreateSemaphore(0)),
- output_queue_semaphore_(OS::CreateSemaphore(0)),
- time_spent_compiling_(0),
- time_spent_total_(0) {
- NoBarrier_Store(&stop_thread_, static_cast<AtomicWord>(false));
- NoBarrier_Store(&queue_length_, static_cast<AtomicWord>(0));
- }
-
- void Run();
- void Stop();
- void QueueForOptimization(OptimizingCompiler* optimizing_compiler);
- void InstallOptimizedFunctions();
-
- // Wait for the next optimized function and install it.
- Handle<SharedFunctionInfo> InstallNextOptimizedFunction();
-
- inline bool IsQueueAvailable() {
- // We don't need a barrier since we have a data dependency right
- // after.
- Atomic32 current_length = NoBarrier_Load(&queue_length_);
-
- // This can be queried only from the execution thread.
- ASSERT(!IsOptimizerThread());
- // Since only the execution thread increments queue_length_ and
- // only one thread can run inside an Isolate at one time, a direct
- // doesn't introduce a race -- queue_length_ may decreased in
- // meantime, but not increased.
- return (current_length < FLAG_parallel_recompilation_queue_length);
- }
-
-#ifdef DEBUG
- bool IsOptimizerThread();
-#endif
-
- ~OptimizingCompilerThread() {
- delete output_queue_semaphore_; // Only used for manual mode.
- delete input_queue_semaphore_;
- delete stop_semaphore_;
- }
-
- private:
-#ifdef DEBUG
- int thread_id_;
-#endif
-
- Isolate* isolate_;
- Semaphore* stop_semaphore_;
- Semaphore* input_queue_semaphore_;
- Semaphore* output_queue_semaphore_;
- UnboundQueue<OptimizingCompiler*> input_queue_;
- UnboundQueue<OptimizingCompiler*> output_queue_;
- volatile AtomicWord stop_thread_;
- volatile Atomic32 queue_length_;
- int64_t time_spent_compiling_;
- int64_t time_spent_total_;
-};
-
-} } // namespace v8::internal
-
-#endif // V8_OPTIMIZING_COMPILER_THREAD_H_