<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <title>GNU Radio 3.3.0 C++ API: pmt_pool.h Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="doxygen.css" rel="stylesheet" type="text/css"/> </head> <body> <!-- Generated by Doxygen 1.6.3 --> <h1>pmt_pool.h</h1><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 2007,2009 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 <vector></span> <a name="l00026"></a>00026 <span class="preprocessor">#include <boost/thread.hpp></span> <a name="l00027"></a>00027 <a name="l00028"></a>00028 <span class="keyword">namespace </span>pmt { <a name="l00029"></a>00029 <span class="comment"></span> <a name="l00030"></a>00030 <span class="comment">/*!</span> <a name="l00031"></a>00031 <span class="comment"> * \brief very simple thread-safe fixed-size allocation pool</span> <a name="l00032"></a>00032 <span class="comment"> *</span> <a name="l00033"></a>00033 <span class="comment"> * FIXME may want to go to global allocation with per-thread free list.</span> <a name="l00034"></a>00034 <span class="comment"> * This would eliminate virtually all lock contention.</span> <a name="l00035"></a>00035 <span class="comment"> */</span> <a name="l00036"></a><a class="code" href="classpmt_1_1pmt__pool.html">00036</a> <span class="keyword">class </span><a class="code" href="classpmt_1_1pmt__pool.html" title="very simple thread-safe fixed-size allocation pool">pmt_pool</a> { <a name="l00037"></a>00037 <a name="l00038"></a>00038 <span class="keyword">struct </span>item { <a name="l00039"></a>00039 <span class="keyword">struct </span>item *d_next; <a name="l00040"></a>00040 }; <a name="l00041"></a>00041 <a name="l00042"></a>00042 <span class="keyword">typedef</span> boost::unique_lock<boost::mutex> scoped_lock; <a name="l00043"></a>00043 <span class="keyword">mutable</span> boost::mutex d_mutex; <a name="l00044"></a>00044 boost::condition_variable d_cond; <a name="l00045"></a>00045 <a name="l00046"></a>00046 <span class="keywordtype">size_t</span> d_itemsize; <a name="l00047"></a>00047 <span class="keywordtype">size_t</span> d_alignment; <a name="l00048"></a>00048 <span class="keywordtype">size_t</span> d_allocation_size; <a name="l00049"></a>00049 <span class="keywordtype">size_t</span> d_max_items; <a name="l00050"></a>00050 <span class="keywordtype">size_t</span> d_n_items; <a name="l00051"></a>00051 item *d_freelist; <a name="l00052"></a>00052 <a class="code" href="classstd_1_1vector.html">std::vector<char *></a> d_allocations; <a name="l00053"></a>00053 <a name="l00054"></a>00054 <span class="keyword">public</span>:<span class="comment"></span> <a name="l00055"></a>00055 <span class="comment"> /*!</span> <a name="l00056"></a>00056 <span class="comment"> * \param itemsize size in bytes of the items to be allocated.</span> <a name="l00057"></a>00057 <span class="comment"> * \param alignment alignment in bytes of all objects to be allocated (must be power-of-2).</span> <a name="l00058"></a>00058 <span class="comment"> * \param allocation_size number of bytes to allocate at a time from the underlying allocator.</span> <a name="l00059"></a>00059 <span class="comment"> * \param max_items is the maximum number of items to allocate. If this number is exceeded,</span> <a name="l00060"></a>00060 <span class="comment"> * the allocate blocks. 0 implies no limit.</span> <a name="l00061"></a>00061 <span class="comment"> */</span> <a name="l00062"></a>00062 <a class="code" href="classpmt_1_1pmt__pool.html#a9438fef8d93d9db926150a2f2aac717c">pmt_pool</a>(<span class="keywordtype">size_t</span> itemsize, <span class="keywordtype">size_t</span> alignment = 16, <a name="l00063"></a>00063 <span class="keywordtype">size_t</span> allocation_size = 4096, <span class="keywordtype">size_t</span> max_items = 0); <a name="l00064"></a>00064 <a class="code" href="classpmt_1_1pmt__pool.html#ab41003391d80e2c7568bbb6929f1d449">~pmt_pool</a>(); <a name="l00065"></a>00065 <a name="l00066"></a>00066 <span class="keywordtype">void</span> *<a class="code" href="classpmt_1_1pmt__pool.html#a4da3bad0784c073f0c7770629dbc75e2">malloc</a>(); <a name="l00067"></a>00067 <span class="keywordtype">void</span> <a class="code" href="classpmt_1_1pmt__pool.html#a0d02de719662f1ea9b14f78f0fd5c28e">free</a>(<span class="keywordtype">void</span> *p); <a name="l00068"></a>00068 }; <a name="l00069"></a>00069 <a name="l00070"></a>00070 } <span class="comment">/* namespace pmt */</span> <a name="l00071"></a>00071 <a name="l00072"></a>00072 <span class="preprocessor">#endif </span><span class="comment">/* INCLUDED_PMT_POOL_H */</span> </pre></div></div> <hr class="footer"/><address style="text-align: right;"><small>Generated on Wed Dec 29 19:51:01 2010 for GNU Radio 3.3.0 C++ API by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.3 </small></address> </body> </html>