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<h1>pmt_pool.h</h1> </div>
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<a href="pmt__pool_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- c++ -*- */</span>
<a name="l00002"></a>00002 <span class="comment">/*</span>
<a name="l00003"></a>00003 <span class="comment"> * Copyright 2007 Free Software Foundation, Inc.</span>
<a name="l00004"></a>00004 <span class="comment"> * </span>
<a name="l00005"></a>00005 <span class="comment"> * This file is part of GNU Radio</span>
<a name="l00006"></a>00006 <span class="comment"> * </span>
<a name="l00007"></a>00007 <span class="comment"> * GNU Radio is free software; you can redistribute it and/or modify</span>
<a name="l00008"></a>00008 <span class="comment"> * it under the terms of the GNU General Public License as published by</span>
<a name="l00009"></a>00009 <span class="comment"> * the Free Software Foundation; either version 3, or (at your option)</span>
<a name="l00010"></a>00010 <span class="comment"> * any later version.</span>
<a name="l00011"></a>00011 <span class="comment"> * </span>
<a name="l00012"></a>00012 <span class="comment"> * GNU Radio is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="l00015"></a>00015 <span class="comment"> * GNU General Public License for more details.</span>
<a name="l00016"></a>00016 <span class="comment"> * </span>
<a name="l00017"></a>00017 <span class="comment"> * You should have received a copy of the GNU General Public License along</span>
<a name="l00018"></a>00018 <span class="comment"> * with this program; if not, write to the Free Software Foundation, Inc.,</span>
<a name="l00019"></a>00019 <span class="comment"> * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.</span>
<a name="l00020"></a>00020 <span class="comment"> */</span>
<a name="l00021"></a>00021 <span class="preprocessor">#ifndef INCLUDED_PMT_POOL_H</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define INCLUDED_PMT_POOL_H</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include <cstddef></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <gnuradio/omnithread.h></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <vector></span>
<a name="l00027"></a>00027 <span class="comment"></span>
<a name="l00028"></a>00028 <span class="comment">/*!</span>
<a name="l00029"></a>00029 <span class="comment"> * \brief very simple thread-safe fixed-size allocation pool</span>
<a name="l00030"></a>00030 <span class="comment"> *</span>
<a name="l00031"></a>00031 <span class="comment"> * FIXME may want to go to global allocation with per-thread free list.</span>
<a name="l00032"></a>00032 <span class="comment"> * This would eliminate virtually all lock contention.</span>
<a name="l00033"></a>00033 <span class="comment"> */</span>
<a name="l00034"></a><a class="code" href="classpmt__pool.html">00034</a> <span class="keyword">class </span><a class="code" href="classpmt__pool.html" title="very simple thread-safe fixed-size allocation pool">pmt_pool</a> {
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="keyword">struct </span>item {
<a name="l00037"></a>00037 <span class="keyword">struct </span>item *d_next;
<a name="l00038"></a>00038 };
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <a class="code" href="classomni__mutex.html">omni_mutex</a> d_mutex;
<a name="l00041"></a>00041 <a class="code" href="classomni__condition.html">omni_condition</a> d_cond;
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="keywordtype">size_t</span> d_itemsize;
<a name="l00044"></a>00044 <span class="keywordtype">size_t</span> d_alignment;
<a name="l00045"></a>00045 <span class="keywordtype">size_t</span> d_allocation_size;
<a name="l00046"></a>00046 <span class="keywordtype">size_t</span> d_max_items;
<a name="l00047"></a>00047 <span class="keywordtype">size_t</span> d_n_items;
<a name="l00048"></a>00048 item *d_freelist;
<a name="l00049"></a>00049 <a class="code" href="classstd_1_1vector.html">std::vector<char *></a> d_allocations;
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <span class="keyword">public</span>:<span class="comment"></span>
<a name="l00052"></a>00052 <span class="comment"> /*!</span>
<a name="l00053"></a>00053 <span class="comment"> * \param itemsize size in bytes of the items to be allocated.</span>
<a name="l00054"></a>00054 <span class="comment"> * \param alignment alignment in bytes of all objects to be allocated (must be power-of-2).</span>
<a name="l00055"></a>00055 <span class="comment"> * \param allocation_size number of bytes to allocate at a time from the underlying allocator.</span>
<a name="l00056"></a>00056 <span class="comment"> * \param max_items is the maximum number of items to allocate. If this number is exceeded,</span>
<a name="l00057"></a>00057 <span class="comment"> * the allocate blocks. 0 implies no limit.</span>
<a name="l00058"></a>00058 <span class="comment"> */</span>
<a name="l00059"></a>00059 <a class="code" href="classpmt__pool.html#aff4e8d57d1441a79ccd0a7b6164f7e4e">pmt_pool</a>(<span class="keywordtype">size_t</span> itemsize, <span class="keywordtype">size_t</span> alignment = 16,
<a name="l00060"></a>00060 <span class="keywordtype">size_t</span> allocation_size = 4096, <span class="keywordtype">size_t</span> max_items = 0);
<a name="l00061"></a>00061 <a class="code" href="classpmt__pool.html#aee7004d923b1a2bfef46c46d8e18a0eb">~pmt_pool</a>();
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="keywordtype">void</span> *<a class="code" href="classpmt__pool.html#a92d57a2f62e3b02693b86755e42a23c2">malloc</a>();
<a name="l00064"></a>00064 <span class="keywordtype">void</span> <a class="code" href="classpmt__pool.html#a949bba8b34cfa48772eecf8926cb475b">free</a>(<span class="keywordtype">void</span> *p);
<a name="l00065"></a>00065 };
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <span class="preprocessor">#endif </span><span class="comment">/* INCLUDED_PMT_POOL_H */</span>
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