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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>DMTL: mmalloc_allocator.h Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.7 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="annotated.html"><span>Classes</span></a></li> <li id="current"><a href="files.html"><span>Files</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> </ul></div><h1>mmalloc_allocator.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span><a name="l00002"></a>00002 <span class="comment"> * Copyright (C) 2005 M.J. Zaki <zaki@cs.rpi.edu> Rensselaer Polytechnic Institute</span><a name="l00003"></a>00003 <span class="comment"> * Written by parimi@cs.rpi.edu</span><a name="l00004"></a>00004 <span class="comment"> * Updated by chaojv@cs.rpi.edu, alhasan@cs.rpi.edu, salems@cs.rpi.edu</span><a name="l00005"></a>00005 <span class="comment"> *</span><a name="l00006"></a>00006 <span class="comment"> * This program is free software; you can redistribute it and/or</span><a name="l00007"></a>00007 <span class="comment"> * modify it under the terms of the GNU General Public License</span><a name="l00008"></a>00008 <span class="comment"> * as published by the Free Software Foundation; either version 2</span><a name="l00009"></a>00009 <span class="comment"> * of the License, or (at your option) any later version.</span><a name="l00010"></a>00010 <span class="comment"> *</span><a name="l00011"></a>00011 <span class="comment"> * This program is distributed in the hope that it will be useful,</span><a name="l00012"></a>00012 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span><a name="l00013"></a>00013 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span><a name="l00014"></a>00014 <span class="comment"> * GNU General Public License for more details.</span><a name="l00015"></a>00015 <span class="comment"> *</span><a name="l00016"></a>00016 <span class="comment"> * You should have received a copy of the GNU General Public License along</span><a name="l00017"></a>00017 <span class="comment"> * with this program; if not, write to the Free Software Foundation, Inc.,</span><a name="l00018"></a>00018 <span class="comment"> * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.</span><a name="l00019"></a>00019 <span class="comment"> */</span><a name="l00020"></a>00020 <a name="l00021"></a>00021 <span class="preprocessor">#ifndef _MMALLOC_ALLOCATOR_H_</span><a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define _MMALLOC_ALLOCATOR_H_</span><a name="l00023"></a>00023 <span class="preprocessor"></span><a name="l00024"></a>00024 <span class="preprocessor">#include <sys/types.h></span><a name="l00025"></a>00025 <span class="preprocessor">#include <sys/stat.h></span><a name="l00026"></a>00026 <span class="preprocessor">#include <fcntl.h></span><a name="l00027"></a>00027 <span class="preprocessor">#include <unistd.h></span><a name="l00028"></a>00028 <span class="preprocessor">#include <stdio.h></span><a name="l00029"></a>00029 <span class="preprocessor">#include <sys/mman.h></span><a name="l00030"></a>00030 <a name="l00031"></a>00031 <span class="preprocessor">#include <memory></span><a name="l00032"></a>00032 <span class="preprocessor">#include <new></span><a name="l00033"></a>00033 <span class="preprocessor">#include <iostream></span><a name="l00034"></a>00034 <span class="preprocessor">#include <vector></span><a name="l00035"></a>00035 <span class="preprocessor">#include <map></span><a name="l00036"></a>00036 <span class="preprocessor">#include <list></span><a name="l00037"></a>00037 <span class="preprocessor">#include <cassert></span><a name="l00038"></a>00038 <span class="keyword">extern</span> <span class="stringliteral">"C"</span>{<a name="l00039"></a>00039 <span class="preprocessor">#include <mmalloc.h></span><a name="l00040"></a>00040 }<a name="l00041"></a>00041 <span class="preprocessor">#include "time_tracker.h"</span><a name="l00042"></a>00042 <a name="l00043"></a>00043 <span class="keyword">using namespace </span>std;<a name="l00044"></a>00044 <a name="l00045"></a>00045 <span class="keyword">class </span>mmalloc_wrapper {<a name="l00046"></a>00046 <a name="l00047"></a>00047 <span class="keyword">public</span>:<a name="l00048"></a>00048 mmalloc_wrapper() {<a name="l00049"></a>00049 <a name="l00050"></a>00050 <span class="keywordflow">if</span>(visited == <span class="keyword">false</span>) {<a name="l00051"></a>00051 <a name="l00052"></a>00052 mmap_fd = open(<span class="stringliteral">"xxxx000.tmp"</span>, O_RDWR | O_CREAT, 0777);<a name="l00053"></a>00053 <span class="keywordflow">if</span> (mmap_fd < 0) {<a name="l00054"></a>00054 cout << <span class="stringliteral">"Open failed"</span> << endl;<a name="l00055"></a>00055 exit(1);<a name="l00056"></a>00056 }<a name="l00057"></a>00057 <a name="l00058"></a>00058 mmalloc_md = mmalloc_attach(mmap_fd, (<span class="keywordtype">void</span> *) NULL);<a name="l00059"></a>00059 <span class="keywordflow">if</span> (mmalloc_md == NULL) {<a name="l00060"></a>00060 cout << <span class="stringliteral">"mmalloc_attach failed!!"</span> << endl;<a name="l00061"></a>00061 exit(1);<a name="l00062"></a>00062 }<a name="l00063"></a>00063 <a name="l00064"></a>00064 visited = <span class="keyword">true</span>;<a name="l00065"></a>00065 } <a name="l00066"></a>00066 }<a name="l00067"></a>00067 <a name="l00068"></a>00068 <span class="keyword">static</span> <span class="keywordtype">int</span> mmap_fd;<a name="l00069"></a>00069 <span class="keyword">static</span> <span class="keywordtype">void</span>* mmalloc_md;<a name="l00070"></a>00070 <span class="keyword">static</span> <span class="keywordtype">bool</span> visited;<a name="l00071"></a>00071 };<a name="l00072"></a>00072 <span class="keywordtype">bool</span> mmalloc_wrapper::visited=<span class="keyword">false</span>;<a name="l00073"></a>00073 <span class="keywordtype">void</span>* mmalloc_wrapper::mmalloc_md;<a name="l00074"></a>00074 <span class="keywordtype">int</span> mmalloc_wrapper::mmap_fd;<a name="l00075"></a>00075 <a name="l00076"></a>00076 <span class="comment">/*</span><a name="l00077"></a>00077 <span class="comment"> * mmalloc based allocator.</span><a name="l00078"></a>00078 <span class="comment"> */</span><a name="l00079"></a>00079 <span class="keyword">template</span> <<span class="keyword">class</span> _Tp><a name="l00080"></a>00080 <span class="keyword">class </span>mmalloc_allocator {<a name="l00081"></a>00081 <span class="keyword">public</span>:<a name="l00082"></a>00082 <a name="l00083"></a>00083 <span class="keyword">typedef</span> _Tp value_type;<a name="l00084"></a>00084 <span class="keyword">typedef</span> value_type * pointer;<a name="l00085"></a>00085 <span class="keyword">typedef</span> <span class="keyword">const</span> _Tp* const_pointer;<a name="l00086"></a>00086 <span class="keyword">typedef</span> _Tp& reference;<a name="l00087"></a>00087 <span class="keyword">typedef</span> <span class="keyword">const</span> _Tp& const_reference;<a name="l00088"></a>00088 <span class="keyword">typedef</span> size_t size_type;<a name="l00089"></a>00089 <span class="keyword">typedef</span> ptrdiff_t difference_type;<a name="l00090"></a>00090 <a name="l00091"></a>00091 <span class="keyword">template</span> <<span class="keyword">class</span> _Tp1> <span class="keyword">struct </span>rebind {<a name="l00092"></a>00092 <span class="keyword">typedef</span> mmalloc_allocator<_Tp1> other;<a name="l00093"></a>00093 };<a name="l00094"></a>00094 <a name="l00095"></a>00095 mmalloc_allocator() { }<a name="l00096"></a>00096 <a name="l00097"></a>00097 <span class="keyword">template</span> <<span class="keyword">class</span> U> <a name="l00098"></a>00098 mmalloc_allocator(mmalloc_allocator<U> <span class="keyword">const</span>& other) { } <a name="l00099"></a>00099 <a name="l00100"></a>00100 <span class="keyword">template</span> <<span class="keyword">class</span> U> <a name="l00101"></a>00101 mmalloc_allocator& operator=(mmalloc_allocator<U> <span class="keyword">const</span>& other) { <a name="l00102"></a>00102 <span class="keywordflow">return</span> *<span class="keyword">this</span>; <a name="l00103"></a>00103 }<a name="l00104"></a>00104 <a name="l00105"></a>00105 <span class="keyword">template</span> <<span class="keyword">typename</span> U><a name="l00106"></a>00106 <span class="keyword">friend</span> <span class="keyword">class </span>mmalloc_allocator;<a name="l00107"></a>00107 <a name="l00108"></a>00108 ~mmalloc_allocator() {<a name="l00109"></a>00109 }<a name="l00110"></a>00110 <a name="l00111"></a>00111 pointer address(reference __x) { <a name="l00112"></a>00112 <span class="keywordflow">return</span> &__x; <a name="l00113"></a>00113 }<a name="l00114"></a>00114 <a name="l00115"></a>00115 const_pointer address(const_reference __x)<span class="keyword"> const </span>{ <a name="l00116"></a>00116 <span class="keywordflow">return</span> &__x; <a name="l00117"></a>00117 }<a name="l00118"></a>00118 <a name="l00119"></a>00119 <span class="comment">/*</span><a name="l00120"></a>00120 <span class="comment"> * __n is permitted to be 0. The C++ standard says nothing about what</span><a name="l00121"></a>00121 <span class="comment"> * the return value is when __n == 0.</span><a name="l00122"></a>00122 <span class="comment"> */</span><a name="l00123"></a>00123 _Tp* allocate(size_type __n, <span class="keyword">const</span> <span class="keywordtype">void</span>* = 0)<span class="keyword"> const </span>{<a name="l00124"></a>00124 <span class="keywordflow">return</span> __n == 0 ? NULL : (_Tp*)mmalloc(wrap.mmalloc_md, __n * <span class="keyword">sizeof</span>(value_type));<a name="l00125"></a>00125 }<a name="l00126"></a>00126 <a name="l00127"></a>00127 <span class="comment">/*</span><a name="l00128"></a>00128 <span class="comment"> *__p is permitted to be a null pointer, only if n==0.</span><a name="l00129"></a>00129 <span class="comment"> */</span><a name="l00130"></a>00130 <span class="keywordtype">void</span> deallocate(pointer __p, size_type __n)<span class="keyword"> const </span>{<a name="l00131"></a>00131 <span class="keywordflow">if</span>(__p != 0)<a name="l00132"></a>00132 mfree(wrap.mmalloc_md, __p);<a name="l00133"></a>00133 }<a name="l00134"></a>00134 <a name="l00135"></a>00135 size_type max_size()<span class="keyword"> const </span>{ <a name="l00136"></a>00136 <span class="keywordflow">return</span> size_t(-1) / <span class="keyword">sizeof</span>(value_type); <a name="l00137"></a>00137 }<a name="l00138"></a>00138 <a name="l00139"></a>00139 <span class="keywordtype">void</span> construct(pointer __p, <span class="keyword">const</span> _Tp& __val)<span class="keyword"> const </span>{ <a name="l00140"></a>00140 <span class="keyword">new</span> (__p) _Tp(__val); <a name="l00141"></a>00141 }<a name="l00142"></a>00142 <a name="l00143"></a>00143 <span class="keywordtype">void</span> destroy(pointer __p)<span class="keyword"> const </span>{ <a name="l00144"></a>00144 __p->~_Tp(); <a name="l00145"></a>00145 }<a name="l00146"></a>00146 <a name="l00147"></a>00147 <span class="keyword">private</span>:<a name="l00148"></a>00148 <span class="keyword">static</span> mmalloc_wrapper wrap;<a name="l00149"></a>00149 };<a name="l00150"></a>00150 <a name="l00151"></a>00151 <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp> <a name="l00152"></a>00152 mmalloc_wrapper mmalloc_allocator<_Tp>::wrap;<a name="l00153"></a>00153 <a name="l00154"></a>00154 <span class="keyword">template</span><<span class="keyword">class </span>_Ty,<a name="l00155"></a>00155 <span class="keyword">class </span>_Other> <span class="keyword">inline</span><a name="l00156"></a>00156 <span class="keywordtype">bool</span> operator==(<span class="keyword">const</span> mmalloc_allocator<_Ty>&, <span class="keyword">const</span> mmalloc_allocator<_Other>&) { <a name="l00157"></a>00157 <span class="comment">// test for allocator equality (always true)</span><a name="l00158"></a>00158 <span class="keywordflow">return</span> (<span class="keyword">true</span>);<a name="l00159"></a>00159 }<a name="l00160"></a>00160 <a name="l00161"></a>00161 <span class="keyword">template</span><<span class="keyword">class </span>_Ty,<a name="l00162"></a>00162 <span class="keyword">class </span>_Other> <span class="keyword">inline</span><a name="l00163"></a>00163 <span class="keywordtype">bool</span> operator!=(<span class="keyword">const</span> mmalloc_allocator<_Ty>&, <span class="keyword">const</span> mmalloc_allocator<_Other>&) { <a name="l00164"></a>00164 <span class="comment">// test for allocator inequality (always false)</span><a name="l00165"></a>00165 <span class="keywordflow">return</span> (<span class="keyword">false</span>);<a name="l00166"></a>00166 }<a name="l00167"></a>00167 <a name="l00168"></a>00168 <span class="preprocessor">#endif</span></pre></div><hr size="1"><address style="align: right;"><small>Generated on Wed Jun 28 14:32:21 2006 for DMTL by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.7 </small></address></body></html>⌨️ 快捷键说明
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