/* * Copyright (C) 2008 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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 "config.h" #include "RegisterFile.h" #include "ConservativeRoots.h" #include "Interpreter.h" namespace JSC { static size_t committedBytesCount = 0; static Mutex& registerFileStatisticsMutex() { DEFINE_STATIC_LOCAL(Mutex, staticMutex, ()); return staticMutex; } RegisterFile::~RegisterFile() { void* base = m_reservation.base(); m_reservation.decommit(base, reinterpret_cast<intptr_t>(m_commitEnd) - reinterpret_cast<intptr_t>(base)); addToCommittedByteCount(-(reinterpret_cast<intptr_t>(m_commitEnd) - reinterpret_cast<intptr_t>(base))); m_reservation.deallocate(); } void RegisterFile::gatherConservativeRoots(ConservativeRoots& conservativeRoots) { conservativeRoots.add(begin(), end()); } void RegisterFile::releaseExcessCapacity() { ptrdiff_t delta = reinterpret_cast<uintptr_t>(m_commitEnd) - reinterpret_cast<uintptr_t>(m_reservation.base()); m_reservation.decommit(m_reservation.base(), delta); addToCommittedByteCount(-delta); m_commitEnd = static_cast<Register*>(m_reservation.base()); } void RegisterFile::initializeThreading() { registerFileStatisticsMutex(); } size_t RegisterFile::committedByteCount() { MutexLocker locker(registerFileStatisticsMutex()); return committedBytesCount; } void RegisterFile::addToCommittedByteCount(long byteCount) { MutexLocker locker(registerFileStatisticsMutex()); ASSERT(static_cast<long>(committedBytesCount) + byteCount > -1); committedBytesCount += byteCount; } } // namespace JSC