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/*
* 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"
namespace JSC {
RegisterFile::~RegisterFile()
{
#if HAVE(MMAP)
munmap(reinterpret_cast<char*>(m_buffer), ((m_max - m_start) + m_maxGlobals) * sizeof(Register));
#elif HAVE(VIRTUALALLOC)
#if OS(WINCE)
VirtualFree(m_buffer, DWORD(m_commitEnd) - DWORD(m_buffer), MEM_DECOMMIT);
#endif
VirtualFree(m_buffer, 0, MEM_RELEASE);
#elif OS(SYMBIAN)
delete m_registerFileAllocator;
#else
fastFree(m_buffer);
#endif
}
void RegisterFile::releaseExcessCapacity()
{
#if OS(QNX)
size_t sizeForGlobals = roundUpAllocationSize(m_maxGlobals * sizeof(Register), commitSize);
Register *endOfGlobals = reinterpret_cast<Register*>(reinterpret_cast<char*>(m_buffer) + sizeForGlobals);
size_t decommitSize = (m_max - endOfGlobals) * sizeof(Register);
if (decommitSize > 0) {
if (mmap(endOfGlobals, decommitSize, PROT_NONE, MAP_FIXED|MAP_LAZY|MAP_PRIVATE|MAP_ANON, -1, 0) == MAP_FAILED)
fprintf(stderr, "Could not decommit register file memory: %d\n", errno);
}
m_commitEnd = endOfGlobals;
#elif HAVE(MMAP) && HAVE(MADV_FREE) && !HAVE(VIRTUALALLOC)
while (madvise(m_start, (m_max - m_start) * sizeof(Register), MADV_FREE) == -1 && errno == EAGAIN) { }
#elif HAVE(VIRTUALALLOC)
VirtualFree(m_start, (m_max - m_start) * sizeof(Register), MEM_DECOMMIT);
m_commitEnd = m_start;
#endif
m_maxUsed = m_start;
}
} // namespace JSC
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