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