<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"> <title>Crystal Space 1.2.1: csutil/threading/atomicops_gcc_ppc.h Source File (Crystal Space 1.2.1 Public API Reference)</title> <link href="tabs.css" rel="stylesheet" type="text/css"> <link href="doxygen.css" rel="stylesheet" type="text/css"> </head><body> <table border="0" cellpadding="0" cellspacing="0" width="100%" class="head"> <tr height="59"> <td class="head" width="202" valign="bottom" style="padding-left:0;"><a href="http://www.crystalspace3d.org/"><img src="csblur.png" width="236" height="59" alt="CrystalSpace" border="0"></a></td> <td class="head"><h2>Public API Reference</h2></td> </tr> <tr height="11"> <td colspan="2" class="headshadow" valign="top" style="padding-left:0;"><img src="csblurb.png" width="236" height="11" alt="" border="0"></td> </tr> </table> <div class="content"> <!-- Generated by Doxygen 1.5.3 --> <div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="modules.html"><span>Modules</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li><a href="classes.html"><span>Classes</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> </ul> </div> <h1>csutil/threading/atomicops_gcc_ppc.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) 2006 by Marten Svanfeldt</span> <a name="l00003"></a>00003 <span class="comment"></span> <a name="l00004"></a>00004 <span class="comment"> This library is free software; you can redistribute it and/or</span> <a name="l00005"></a>00005 <span class="comment"> modify it under the terms of the GNU Lesser General Public</span> <a name="l00006"></a>00006 <span class="comment"> License as published by the Free Software Foundation; either</span> <a name="l00007"></a>00007 <span class="comment"> version 2 of the License, or (at your option) any later version.</span> <a name="l00008"></a>00008 <span class="comment"></span> <a name="l00009"></a>00009 <span class="comment"> This library is distributed in the hope that it will be useful,</span> <a name="l00010"></a>00010 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span> <a name="l00011"></a>00011 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span> <a name="l00012"></a>00012 <span class="comment"> Library General Public License for more details.</span> <a name="l00013"></a>00013 <span class="comment"></span> <a name="l00014"></a>00014 <span class="comment"> You should have received a copy of the GNU Library General Public</span> <a name="l00015"></a>00015 <span class="comment"> License along with this library; if not, write to the Free</span> <a name="l00016"></a>00016 <span class="comment"> Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.</span> <a name="l00017"></a>00017 <span class="comment">*/</span> <a name="l00018"></a>00018 <a name="l00019"></a>00019 <span class="preprocessor">#ifndef __CS_CSUTIL_ATOMICOPS_GCC_PPC_H__</span> <a name="l00020"></a>00020 <span class="preprocessor"></span><span class="preprocessor">#define __CS_CSUTIL_ATOMICOPS_GCC_PPC_H__</span> <a name="l00021"></a>00021 <span class="preprocessor"></span> <a name="l00022"></a>00022 <span class="preprocessor">#ifndef DOXYGEN_RUN</span> <a name="l00023"></a>00023 <span class="preprocessor"></span> <a name="l00024"></a>00024 <span class="keyword">namespace </span>CS <a name="l00025"></a>00025 { <a name="l00026"></a>00026 <span class="keyword">namespace </span>Threading <a name="l00027"></a>00027 { <a name="l00028"></a>00028 <span class="keyword">class </span>AtomicOperationsPPCGCC <a name="l00029"></a>00029 { <a name="l00030"></a>00030 <span class="keyword">public</span>: <a name="l00031"></a>00031 <span class="keyword">inline</span> <span class="keyword">static</span> <a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a> Set (<a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a>* target, <a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a> value) <a name="l00032"></a>00032 { <a name="l00033"></a>00033 __asm__ __volatile__ <a name="l00034"></a>00034 ( <a name="l00035"></a>00035 <span class="stringliteral">" lwsync \n"</span> <a name="l00036"></a>00036 <span class="stringliteral">"1: lwarx %0,0,%2 \n"</span> <a name="l00037"></a>00037 <span class="stringliteral">" dcbt 0,%2 \n"</span> <a name="l00038"></a>00038 <span class="stringliteral">" stwcx. %3,0,%2 \n"</span> <a name="l00039"></a>00039 <span class="stringliteral">" bne- 1b\n"</span> <a name="l00040"></a>00040 <span class="stringliteral">" isync \n"</span> <a name="l00041"></a>00041 : <span class="stringliteral">"=&r"</span> (value), <span class="stringliteral">"=m"</span> (*(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *)target) <a name="l00042"></a>00042 : <span class="stringliteral">"r"</span> (target), <span class="stringliteral">"r"</span> (value), <span class="stringliteral">"m"</span> (*(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *)target) <a name="l00043"></a>00043 : <span class="stringliteral">"cc"</span>, <span class="stringliteral">"memory"</span> <a name="l00044"></a>00044 ); <a name="l00045"></a>00045 <span class="keywordflow">return</span> value; <a name="l00046"></a>00046 } <a name="l00047"></a>00047 <a name="l00048"></a>00048 <span class="keyword">inline</span> <span class="keyword">static</span> <span class="keywordtype">void</span>* Set (<span class="keywordtype">void</span>** target, <span class="keywordtype">void</span>* value) <a name="l00049"></a>00049 { <a name="l00050"></a>00050 <span class="keywordflow">return</span> (<span class="keywordtype">void</span>*)Set ((<a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a>*)target, (<a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a>)value); <a name="l00051"></a>00051 } <a name="l00052"></a>00052 <a name="l00053"></a>00053 <span class="keyword">inline</span> <span class="keyword">static</span> <a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a> CompareAndSet (<a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a>* target, <a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a> value, <a name="l00054"></a>00054 <a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a> comparand) <a name="l00055"></a>00055 { <a name="l00056"></a>00056 <a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a> prev; <a name="l00057"></a>00057 <a name="l00058"></a>00058 __asm__ __volatile__ ( <a name="l00059"></a>00059 <span class="stringliteral">" lwsync \n"</span> <a name="l00060"></a>00060 <span class="stringliteral">"1: lwarx %0,0,%2\n"</span> <a name="l00061"></a>00061 <span class="stringliteral">" cmpw 0,%0,%3\n"</span> <a name="l00062"></a>00062 <span class="stringliteral">" bne- 2f\n"</span> <a name="l00063"></a>00063 <span class="stringliteral">" dcbt 0,%2 \n"</span> <a name="l00064"></a>00064 <span class="stringliteral">" stwcx. %4,0,%2\n"</span> <a name="l00065"></a>00065 <span class="stringliteral">" bne- 1b\n"</span> <a name="l00066"></a>00066 <span class="stringliteral">" isync \n"</span> <a name="l00067"></a>00067 <span class="stringliteral">"2:"</span> <a name="l00068"></a>00068 : <span class="stringliteral">"=&r"</span> (prev), <span class="stringliteral">"=m"</span> (*target) <a name="l00069"></a>00069 : <span class="stringliteral">"r"</span> (target), <span class="stringliteral">"r"</span> (comparand), <span class="stringliteral">"r"</span> (value), <span class="stringliteral">"m"</span> (*target) <a name="l00070"></a>00070 : <span class="stringliteral">"cc"</span>, <span class="stringliteral">"memory"</span>); <a name="l00071"></a>00071 <span class="keywordflow">return</span> prev; <a name="l00072"></a>00072 } <a name="l00073"></a>00073 <a name="l00074"></a>00074 <span class="keyword">inline</span> <span class="keyword">static</span> <span class="keywordtype">void</span>* CompareAndSet (<span class="keywordtype">void</span>** target, <span class="keywordtype">void</span>* value, <a name="l00075"></a>00075 <span class="keywordtype">void</span>* comparand) <a name="l00076"></a>00076 { <a name="l00077"></a>00077 <span class="keywordflow">return</span> (<span class="keywordtype">void</span>*)CompareAndSet ((<a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a>*)target, (<a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a>)value, <a name="l00078"></a>00078 (<a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a>)comparand); <a name="l00079"></a>00079 } <a name="l00080"></a>00080 <a name="l00081"></a>00081 <span class="keyword">inline</span> <span class="keyword">static</span> <a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a> Increment (<a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a>* target, <a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a> incr = 1) <a name="l00082"></a>00082 { <a name="l00083"></a>00083 <span class="comment">//@@Potentially dangerous code, needs to be revisited</span> <a name="l00084"></a>00084 <a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a> prevValue, currValue, nextValue; <a name="l00085"></a>00085 <span class="keywordflow">do</span> <a name="l00086"></a>00086 { <a name="l00087"></a>00087 currValue = *target; <a name="l00088"></a>00088 nextValue = currValue + incr; <a name="l00089"></a>00089 prevValue = CompareAndSet (target, nextValue, currValue); <a name="l00090"></a>00090 } <span class="keywordflow">while</span>(prevValue == currValue); <a name="l00091"></a>00091 <span class="keywordflow">return</span> nextValue; <a name="l00092"></a>00092 } <a name="l00093"></a>00093 <a name="l00094"></a>00094 <span class="keyword">inline</span> <span class="keyword">static</span> <a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a> Decrement (<a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a>* target) <a name="l00095"></a>00095 { <a name="l00096"></a>00096 <span class="keywordflow">return</span> (<a class="code" href="group__util.html#g56f1a81c92849566ae864511088eb7e8" title="signed 32-bit integer (-2 147 483 648..2 147 483 647)">int32</a>)Increment (target, -1); <a name="l00097"></a>00097 } <a name="l00098"></a>00098 }; <a name="l00099"></a>00099 } <a name="l00100"></a>00100 } <a name="l00101"></a>00101 <a name="l00102"></a>00102 <span class="preprocessor">#endif // DOXYGEN_RUN</span> <a name="l00103"></a>00103 <span class="preprocessor"></span> <a name="l00104"></a>00104 <span class="preprocessor">#endif // __CS_CSUTIL_ATOMICOPS_GCC_PPC_H__</span> </pre></div><hr size="1"><address><small>Generated for Crystal Space 1.2.1 by <a href="http://www.doxygen.org/index.html">doxygen</a> 1.5.3 </small></address> </div></body> </html>