| 1 | /* |
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| 2 | * Copyright (C) 2008 Apple Inc. All rights reserved. |
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| 3 | * |
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| 4 | * Redistribution and use in source and binary forms, with or without |
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| 5 | * modification, are permitted provided that the following conditions |
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| 6 | * are met: |
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| 7 | * |
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| 8 | * 1. Redistributions of source code must retain the above copyright |
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| 9 | * notice, this list of conditions and the following disclaimer. |
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer in the |
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| 12 | * documentation and/or other materials provided with the distribution. |
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| 13 | * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
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| 14 | * its contributors may be used to endorse or promote products derived |
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| 15 | * from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
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| 18 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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| 19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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| 20 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
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| 21 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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| 22 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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| 23 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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| 24 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |
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| 29 | #include "config.h" |
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| 30 | #include "RegisterFile.h" |
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| 31 | |
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| 32 | namespace JSC { |
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| 33 | |
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| 34 | RegisterFile::~RegisterFile() |
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| 35 | { |
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| 36 | #if HAVE(MMAP) |
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| 37 | munmap(addr: reinterpret_cast<char*>(m_buffer), len: ((m_max - m_start) + m_maxGlobals) * sizeof(Register)); |
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| 38 | #elif HAVE(VIRTUALALLOC) |
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| 39 | #if OS(WINCE) |
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| 40 | VirtualFree(m_buffer, DWORD(m_commitEnd) - DWORD(m_buffer), MEM_DECOMMIT); |
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| 41 | #endif |
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| 42 | VirtualFree(m_buffer, 0, MEM_RELEASE); |
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| 43 | #elif OS(SYMBIAN) |
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| 44 | delete m_registerFileAllocator; |
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| 45 | #else |
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| 46 | fastFree(m_buffer); |
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| 47 | #endif |
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| 48 | } |
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| 49 | |
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| 50 | void RegisterFile::releaseExcessCapacity() |
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| 51 | { |
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| 52 | #if HAVE(MMAP) && HAVE(MADV_FREE) && !HAVE(VIRTUALALLOC) |
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| 53 | while (madvise(m_start, (m_max - m_start) * sizeof(Register), MADV_FREE) == -1 && errno == EAGAIN) { } |
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| 54 | #elif HAVE(VIRTUALALLOC) |
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| 55 | VirtualFree(m_start, (m_max - m_start) * sizeof(Register), MEM_DECOMMIT); |
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| 56 | m_commitEnd = m_start; |
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| 57 | #endif |
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| 58 | m_maxUsed = m_start; |
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| 59 | } |
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| 60 | |
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| 61 | } // namespace JSC |
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| 62 | |
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