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<h1>sample6.cpp</h1><a href="a00102.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
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<a name="l00002"></a>00002 <span class="comment">Copyright(c) 2002-2005 Anatoliy Kuznetsov(anatoliy_kuznetsov at yahoo.com)</span>
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<a name="l00003"></a>00003 <span class="comment"></span>
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<a name="l00004"></a>00004 <span class="comment">Permission is hereby granted, free of charge, to any person </span>
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<a name="l00005"></a>00005 <span class="comment">obtaining a copy of this software and associated documentation </span>
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<a name="l00006"></a>00006 <span class="comment">files (the "Software"), to deal in the Software without restriction, </span>
25
<a name="l00007"></a>00007 <span class="comment">including without limitation the rights to use, copy, modify, merge, </span>
26
<a name="l00008"></a>00008 <span class="comment">publish, distribute, sublicense, and/or sell copies of the Software, </span>
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<a name="l00009"></a>00009 <span class="comment">and to permit persons to whom the Software is furnished to do so, </span>
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<a name="l00010"></a>00010 <span class="comment">subject to the following conditions:</span>
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<a name="l00011"></a>00011 <span class="comment"></span>
30
<a name="l00012"></a>00012 <span class="comment">The above copyright notice and this permission notice shall be included </span>
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<a name="l00013"></a>00013 <span class="comment">in all copies or substantial portions of the Software.</span>
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<a name="l00014"></a>00014 <span class="comment"></span>
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<a name="l00015"></a>00015 <span class="comment">THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, </span>
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<a name="l00016"></a>00016 <span class="comment">EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES </span>
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<a name="l00017"></a>00017 <span class="comment">OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. </span>
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<a name="l00018"></a>00018 <span class="comment">IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, </span>
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<a name="l00019"></a>00019 <span class="comment">DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, </span>
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<a name="l00020"></a>00020 <span class="comment">ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR </span>
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<a name="l00021"></a>00021 <span class="comment">OTHER DEALINGS IN THE SOFTWARE.</span>
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<a name="l00022"></a>00022 <span class="comment">*/</span>
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<a name="l00023"></a>00023 <span class="comment"></span>
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<a name="l00024"></a>00024 <span class="comment">/** \example sample6.cpp</span>
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<a name="l00025"></a>00025 <span class="comment"> This example demonstrates using of custom memory allocators.</span>
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<a name="l00026"></a>00026 <span class="comment"> In this case allocator works as a memory checker, counts number of </span>
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<a name="l00027"></a>00027 <span class="comment"> allocations and deallocations to make sure that there is no memory leaks. </span>
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<a name="l00028"></a>00028 <span class="comment"></span>
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<a name="l00029"></a>00029 <span class="comment">For more information please visit: http://bmagic.sourceforge.net</span>
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<a name="l00030"></a>00030 <span class="comment">*/</span>
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<a name="l00031"></a>00031
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<a name="l00032"></a>00032 <span class="preprocessor">#include <iostream></span>
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<a name="l00033"></a>00033 <span class="preprocessor">#include <assert.h></span>
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<a name="l00034"></a>00034 <span class="preprocessor">#include "<a class="code" href="a00082.html">bm.h</a>"</span>
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<a name="l00035"></a>00035
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<a name="l00036"></a>00036 <span class="keyword">using namespace </span>std;
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<a name="l00037"></a>00037
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<a name="l00038"></a>00038
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<a name="l00039"></a>00039 <span class="comment">// Custom allocator keeps number of all alloc/free calls.</span>
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<a name="l00040"></a>00040 <span class="comment">// It also reservs the front word of the allocated block and saves</span>
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<a name="l00041"></a>00041 <span class="comment">// number of elements allocated. On deallocation it makes sure</span>
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<a name="l00042"></a>00042 <span class="comment">// it deallocates the same size as allocated</span>
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<a name="l00043"></a>00043
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<a name="l00044"></a><a class="code" href="a00055.html">00044</a> <span class="keyword">class </span><a class="code" href="a00055.html">dbg_block_allocator</a>
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<a name="l00045"></a>00045 {
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<a name="l00046"></a>00046 <span class="keyword">public</span>:
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<a name="l00047"></a><a class="code" href="a00055.html#2e3f8148fefdb34093ebf3db55b6175b">00047</a> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <a class="code" href="a00055.html#2e3f8148fefdb34093ebf3db55b6175b">na_</a>;
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<a name="l00048"></a><a class="code" href="a00055.html#adb605865e1f0ea195000e51e90001e6">00048</a> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <a class="code" href="a00055.html#adb605865e1f0ea195000e51e90001e6">nf_</a>;
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<a name="l00049"></a>00049
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<a name="l00050"></a><a class="code" href="a00055.html#93d82be8946cf5b72c9d7c6cb956e804">00050</a> <span class="keyword">static</span> <a class="code" href="a00106.html#17fd5ba52db3ddda05e6f8dd5000a1a4">bm::word_t</a>* <a class="code" href="a00055.html#93d82be8946cf5b72c9d7c6cb956e804">allocate</a>(<span class="keywordtype">size_t</span> n, <span class="keyword">const</span> <span class="keywordtype">void</span> *)
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<a name="l00051"></a>00051 {
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<a name="l00052"></a>00052 ++<a class="code" href="a00055.html#2e3f8148fefdb34093ebf3db55b6175b">na_</a>;
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<a name="l00053"></a>00053 assert(n);
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<a name="l00054"></a>00054 <a class="code" href="a00106.html#17fd5ba52db3ddda05e6f8dd5000a1a4">bm::word_t</a>* p =
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<a name="l00055"></a>00055 (<a class="code" href="a00106.html#17fd5ba52db3ddda05e6f8dd5000a1a4">bm::word_t</a>*) ::malloc((n+1) * <span class="keyword">sizeof</span>(<a class="code" href="a00106.html#17fd5ba52db3ddda05e6f8dd5000a1a4">bm::word_t</a>));
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<a name="l00056"></a>00056 *p = n;
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<a name="l00057"></a>00057 <span class="keywordflow">return</span> ++p;
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<a name="l00058"></a>00058 }
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<a name="l00059"></a>00059
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<a name="l00060"></a><a class="code" href="a00055.html#56d40f419ba5f9e54b61d8ab88f93866">00060</a> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="a00055.html#56d40f419ba5f9e54b61d8ab88f93866">deallocate</a>(<a class="code" href="a00106.html#17fd5ba52db3ddda05e6f8dd5000a1a4">bm::word_t</a>* p, <span class="keywordtype">size_t</span> n)
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<a name="l00061"></a>00061 {
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<a name="l00062"></a>00062 ++<a class="code" href="a00055.html#adb605865e1f0ea195000e51e90001e6">nf_</a>;
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<a name="l00063"></a>00063 --p;
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<a name="l00064"></a>00064 assert(*p == n);
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<a name="l00065"></a>00065 ::free(p);
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<a name="l00066"></a>00066 }
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<a name="l00067"></a>00067
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<a name="l00068"></a><a class="code" href="a00055.html#316046faa0e5010b9d4b4881977dde49">00068</a> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="a00055.html#316046faa0e5010b9d4b4881977dde49">balance</a>()
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<a name="l00069"></a>00069 {
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<a name="l00070"></a>00070 <span class="keywordflow">return</span> <a class="code" href="a00055.html#adb605865e1f0ea195000e51e90001e6">nf_</a> - <a class="code" href="a00055.html#2e3f8148fefdb34093ebf3db55b6175b">na_</a>;
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<a name="l00071"></a>00071 }
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<a name="l00072"></a>00072 };
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<a name="l00073"></a>00073
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<a name="l00074"></a>00074 <span class="keywordtype">unsigned</span> <a class="code" href="a00055.html#2e3f8148fefdb34093ebf3db55b6175b">dbg_block_allocator::na_</a> = 0;
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<a name="l00075"></a>00075 <span class="keywordtype">unsigned</span> <a class="code" href="a00055.html#adb605865e1f0ea195000e51e90001e6">dbg_block_allocator::nf_</a> = 0;
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<a name="l00076"></a>00076
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<a name="l00077"></a><a class="code" href="a00056.html">00077</a> <span class="keyword">class </span><a class="code" href="a00056.html">dbg_ptr_allocator</a>
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<a name="l00078"></a>00078 {
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<a name="l00079"></a>00079 <span class="keyword">public</span>:
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<a name="l00080"></a><a class="code" href="a00056.html#1839c318b76fefce64ba0a0aba52e2b0">00080</a> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <a class="code" href="a00056.html#1839c318b76fefce64ba0a0aba52e2b0">na_</a>;
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<a name="l00081"></a><a class="code" href="a00056.html#fbbe7e12818ba2c51358b66d00fc05f0">00081</a> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <a class="code" href="a00056.html#fbbe7e12818ba2c51358b66d00fc05f0">nf_</a>;
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<a name="l00082"></a>00082
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<a name="l00083"></a><a class="code" href="a00056.html#15a6c29419ebabc9221051cdd63e9495">00083</a> <span class="keyword">static</span> <span class="keywordtype">void</span>* <a class="code" href="a00056.html#15a6c29419ebabc9221051cdd63e9495">allocate</a>(<span class="keywordtype">size_t</span> n, <span class="keyword">const</span> <span class="keywordtype">void</span> *)
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<a name="l00084"></a>00084 {
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<a name="l00085"></a>00085 ++<a class="code" href="a00056.html#1839c318b76fefce64ba0a0aba52e2b0">na_</a>;
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<a name="l00086"></a>00086 assert(<span class="keyword">sizeof</span>(<span class="keywordtype">size_t</span>) == <span class="keyword">sizeof</span>(<span class="keywordtype">void</span>*));
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<a name="l00087"></a>00087 <span class="keywordtype">void</span>* p = ::malloc((n+1) * <span class="keyword">sizeof</span>(<span class="keywordtype">void</span>*));
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<a name="l00088"></a>00088 <span class="keywordtype">size_t</span>* s = (<span class="keywordtype">size_t</span>*) p;
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<a name="l00089"></a>00089 *s = n;
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<a name="l00090"></a>00090 <span class="keywordflow">return</span> (<span class="keywordtype">void</span>*)++s;
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<a name="l00091"></a>00091 }
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<a name="l00092"></a>00092
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<a name="l00093"></a><a class="code" href="a00056.html#89cd3e8e84ef4a4598446ba8fa8c10a3">00093</a> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="a00056.html#89cd3e8e84ef4a4598446ba8fa8c10a3">deallocate</a>(<span class="keywordtype">void</span>* p, <span class="keywordtype">size_t</span> n)
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<a name="l00094"></a>00094 {
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<a name="l00095"></a>00095 ++<a class="code" href="a00056.html#fbbe7e12818ba2c51358b66d00fc05f0">nf_</a>;
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<a name="l00096"></a>00096 <span class="keywordtype">size_t</span>* s = (<span class="keywordtype">size_t</span>*) p;
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<a name="l00097"></a>00097 --s;
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<a name="l00098"></a>00098 assert(*s == n);
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<a name="l00099"></a>00099 ::free(s);
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<a name="l00100"></a>00100 }
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<a name="l00101"></a>00101
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<a name="l00102"></a><a class="code" href="a00056.html#521bc1068c669de23dc20d582d229918">00102</a> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="a00056.html#521bc1068c669de23dc20d582d229918">balance</a>()
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<a name="l00103"></a>00103 {
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<a name="l00104"></a>00104 <span class="keywordflow">return</span> <a class="code" href="a00056.html#fbbe7e12818ba2c51358b66d00fc05f0">nf_</a> - <a class="code" href="a00056.html#1839c318b76fefce64ba0a0aba52e2b0">na_</a>;
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<a name="l00105"></a>00105 }
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<a name="l00106"></a>00106
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<a name="l00107"></a>00107 };
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<a name="l00108"></a>00108
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<a name="l00109"></a>00109 <span class="keywordtype">unsigned</span> <a class="code" href="a00056.html#1839c318b76fefce64ba0a0aba52e2b0">dbg_ptr_allocator::na_</a> = 0;
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<a name="l00110"></a>00110 <span class="keywordtype">unsigned</span> <a class="code" href="a00056.html#fbbe7e12818ba2c51358b66d00fc05f0">dbg_ptr_allocator::nf_</a> = 0;
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<a name="l00111"></a>00111
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<a name="l00112"></a>00112
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<a name="l00113"></a><a class="code" href="a00102.html#a932e8e72ba07938f1a001b6cfcb614e">00113</a> <span class="keyword">typedef</span> <a class="code" href="a00073.html" title="BM style allocator adapter.">bm::mem_alloc<dbg_block_allocator, dbg_ptr_allocator></a> <a class="code" href="a00073.html" title="BM style allocator adapter.">dbg_alloc</a>;
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<a name="l00114"></a>00114
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<a name="l00115"></a><a class="code" href="a00102.html#c07bb102df543a0c581493c5f35b2129">00115</a> <span class="keyword">typedef</span> <a class="code" href="a00040.html" title="bitvector with runtime compression of bits.">bm::bvector<dbg_alloc></a> <a class="code" href="a00040.html" title="bitvector with runtime compression of bits.">bvect</a>;
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<a name="l00116"></a>00116
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<a name="l00117"></a>00117
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<a name="l00118"></a>00118
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<a name="l00119"></a><a class="code" href="a00102.html#840291bc02cba5474a4cb46a9b9566fe">00119</a> <span class="keywordtype">int</span> <a class="code" href="a00097.html#840291bc02cba5474a4cb46a9b9566fe">main</a>(<span class="keywordtype">void</span>)
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<a name="l00120"></a>00120 {
139
<a name="l00121"></a>00121 {
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<a name="l00122"></a>00122 <a class="code" href="a00040.html" title="bitvector with runtime compression of bits.">bvect</a> bv;
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<a name="l00123"></a>00123
142
<a name="l00124"></a>00124 bv[10] = <span class="keyword">true</span>;
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<a name="l00125"></a>00125 bv[100000] = <span class="keyword">true</span>;
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<a name="l00126"></a>00126 bv[10000000] = <span class="keyword">false</span>;
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<a name="l00127"></a>00127 }
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<a name="l00128"></a>00128
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<a name="l00129"></a>00129 cout << <span class="stringliteral">"Number of BLOCK allocations = "</span> << <a class="code" href="a00055.html#2e3f8148fefdb34093ebf3db55b6175b">dbg_block_allocator::na_</a> << endl;
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<a name="l00130"></a>00130 cout << <span class="stringliteral">"Number of PTR allocations = "</span> << <a class="code" href="a00056.html#1839c318b76fefce64ba0a0aba52e2b0">dbg_ptr_allocator::na_</a> << endl;
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<a name="l00131"></a>00131
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<a name="l00132"></a>00132 assert(<a class="code" href="a00055.html#316046faa0e5010b9d4b4881977dde49">dbg_block_allocator::balance</a>() == 0);
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<a name="l00133"></a>00133 assert(<a class="code" href="a00056.html#521bc1068c669de23dc20d582d229918">dbg_ptr_allocator::balance</a>() == 0);
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<a name="l00134"></a>00134
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<a name="l00135"></a>00135 <span class="keywordflow">return</span> 0;
154
<a name="l00136"></a>00136 }
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<a name="l00137"></a>00137
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<a name="l00138"></a>00138
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<hr size="1"><address style="text-align: right;"><small>Generated on Mon Oct 12 12:16:39 2009 for BitMagic by
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