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<h1>JackMessageBuffer.cpp</h1> </div>
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<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) 2004 Rui Nuno Capela, Steve Harris</span>
<a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 2008 Nedko Arnaudov</span>
<a name="l00004"></a>00004 <span class="comment"> * Copyright (C) 2008 Grame</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 modify</span>
<a name="l00007"></a>00007 <span class="comment"> * it under the terms of the GNU Lesser General Public License as published by</span>
<a name="l00008"></a>00008 <span class="comment"> * the Free Software Foundation; either version 2.1 of the License, or</span>
<a name="l00009"></a>00009 <span class="comment"> * (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 Lesser 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 Lesser General Public License</span>
<a name="l00017"></a>00017 <span class="comment"> * along with this program; if not, write to the Free Software</span>
<a name="l00018"></a>00018 <span class="comment"> * Foundation, Inc., 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 <span class="comment"> */</span>
<a name="l00021"></a>00021
<a name="l00022"></a>00022 <span class="preprocessor">#include "JackMessageBuffer.h"</span>
<a name="l00023"></a>00023 <span class="preprocessor">#include "JackGlobals.h"</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "JackError.h"</span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="keyword">namespace </span>Jack
<a name="l00027"></a>00027 {
<a name="l00028"></a>00028
<a name="l00029"></a>00029 JackMessageBuffer* JackMessageBuffer::fInstance = NULL;
<a name="l00030"></a>00030
<a name="l00031"></a>00031 JackMessageBuffer::JackMessageBuffer()
<a name="l00032"></a>00032 :fInit(NULL),fInitArg(NULL),fThread(this),fInBuffer(0),fOutBuffer(0),fOverruns(0),fRunning(false)
<a name="l00033"></a>00033 {}
<a name="l00034"></a>00034
<a name="l00035"></a>00035 JackMessageBuffer::~JackMessageBuffer()
<a name="l00036"></a>00036 {}
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="keywordtype">void</span> JackMessageBuffer::Start()
<a name="l00039"></a>00039 {
<a name="l00040"></a>00040 fRunning = <span class="keyword">true</span>;
<a name="l00041"></a>00041 fThread.StartSync();
<a name="l00042"></a>00042 }
<a name="l00043"></a>00043
<a name="l00044"></a>00044 <span class="keywordtype">void</span> JackMessageBuffer::Stop()
<a name="l00045"></a>00045 {
<a name="l00046"></a>00046 <span class="keywordflow">if</span> (fOverruns > 0) {
<a name="l00047"></a>00047 <a class="code" href="group__ServerControl.html#gac6448626e0b75fc6d9da1ccbdca0355e">jack_error</a>(<span class="stringliteral">"WARNING: %d message buffer overruns!"</span>, fOverruns);
<a name="l00048"></a>00048 } <span class="keywordflow">else</span> {
<a name="l00049"></a>00049 <a class="code" href="group__ServerControl.html#ga35f69faaee3bb9b958ed8c9a5f62246c">jack_log</a>(<span class="stringliteral">"no message buffer overruns"</span>);
<a name="l00050"></a>00050 }
<a name="l00051"></a>00051 fGuard.Lock();
<a name="l00052"></a>00052 fRunning = <span class="keyword">false</span>;
<a name="l00053"></a>00053 fGuard.Signal();
<a name="l00054"></a>00054 fGuard.Unlock();
<a name="l00055"></a>00055 fThread.Stop();
<a name="l00056"></a>00056 Flush();
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="keywordtype">void</span> JackMessageBuffer::Flush()
<a name="l00060"></a>00060 {
<a name="l00061"></a>00061 <span class="keywordflow">while</span> (fOutBuffer != fInBuffer) {
<a name="l00062"></a>00062 jack_log_function(fBuffers[fOutBuffer].level, fBuffers[fOutBuffer].message);
<a name="l00063"></a>00063 fOutBuffer = MB_NEXT(fOutBuffer);
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065 }
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <span class="keywordtype">void</span> JackMessageBuffer::AddMessage(<span class="keywordtype">int</span> level, <span class="keyword">const</span> <span class="keywordtype">char</span> *message)
<a name="l00068"></a>00068 {
<a name="l00069"></a>00069 <span class="keywordflow">if</span> (fGuard.Trylock()) {
<a name="l00070"></a>00070 fBuffers[fInBuffer].level = level;
<a name="l00071"></a>00071 strncpy(fBuffers[fInBuffer].message, message, MB_BUFFERSIZE);
<a name="l00072"></a>00072 fInBuffer = MB_NEXT(fInBuffer);
<a name="l00073"></a>00073 fGuard.Signal();
<a name="l00074"></a>00074 fGuard.Unlock();
<a name="l00075"></a>00075 } <span class="keywordflow">else</span> { <span class="comment">/* lock collision */</span>
<a name="l00076"></a>00076 INC_ATOMIC(&fOverruns);
<a name="l00077"></a>00077 }
<a name="l00078"></a>00078 }
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="keywordtype">bool</span> JackMessageBuffer::Execute()
<a name="l00081"></a>00081 {
<a name="l00082"></a>00082 <span class="keywordflow">while</span> (fRunning) {
<a name="l00083"></a>00083 fGuard.Lock();
<a name="l00084"></a>00084 fGuard.Wait();
<a name="l00085"></a>00085 <span class="comment">/* the client asked for all threads to run a thread</span>
<a name="l00086"></a>00086 <span class="comment"> initialization callback, which includes us.</span>
<a name="l00087"></a>00087 <span class="comment"> */</span>
<a name="l00088"></a>00088 <span class="keywordflow">if</span> (fInit) {
<a name="l00089"></a>00089 fInit(fInitArg);
<a name="l00090"></a>00090 fInit = NULL;
<a name="l00091"></a>00091 <span class="comment">/* and we're done */</span>
<a name="l00092"></a>00092 fGuard.Signal();
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094 Flush();
<a name="l00095"></a>00095 fGuard.Unlock();
<a name="l00096"></a>00096 }
<a name="l00097"></a>00097 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="keywordtype">void</span> JackMessageBuffer::Create()
<a name="l00101"></a>00101 {
<a name="l00102"></a>00102 <span class="keywordflow">if</span> (fInstance == NULL) {
<a name="l00103"></a>00103 fInstance = <span class="keyword">new</span> JackMessageBuffer();
<a name="l00104"></a>00104 fInstance->Start();
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106 }
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="keywordtype">void</span> JackMessageBuffer::Destroy()
<a name="l00109"></a>00109 {
<a name="l00110"></a>00110 <span class="keywordflow">if</span> (fInstance != NULL) {
<a name="l00111"></a>00111 fInstance->Stop();
<a name="l00112"></a>00112 <span class="keyword">delete</span> fInstance;
<a name="l00113"></a>00113 fInstance = NULL;
<a name="l00114"></a>00114 }
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116
<a name="l00117"></a>00117 <span class="keywordtype">void</span> JackMessageBufferAdd(<span class="keywordtype">int</span> level, <span class="keyword">const</span> <span class="keywordtype">char</span> *message)
<a name="l00118"></a>00118 {
<a name="l00119"></a>00119 <span class="keywordflow">if</span> (Jack::JackMessageBuffer::fInstance == NULL) {
<a name="l00120"></a>00120 <span class="comment">/* Unable to print message with realtime safety. Complain and print it anyway. */</span>
<a name="l00121"></a>00121 jack_log_function(LOG_LEVEL_ERROR, <span class="stringliteral">"messagebuffer not initialized, skip message"</span>);
<a name="l00122"></a>00122 } <span class="keywordflow">else</span> {
<a name="l00123"></a>00123 Jack::JackMessageBuffer::fInstance->AddMessage(level, message);
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125 }
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="keywordtype">void</span> JackMessageBuffer::SetInitCallback(JackThreadInitCallback callback, <span class="keywordtype">void</span> *arg)
<a name="l00128"></a>00128 {
<a name="l00129"></a>00129 fGuard.Lock();
<a name="l00130"></a>00130 <span class="comment">/* set up the callback */</span>
<a name="l00131"></a>00131 fInitArg = arg;
<a name="l00132"></a>00132 fInit = callback;
<a name="l00133"></a>00133 <span class="comment">/* wake msg buffer thread */</span>
<a name="l00134"></a>00134 fGuard.Signal();
<a name="l00135"></a>00135 <span class="comment">/* wait for it to be done */</span>
<a name="l00136"></a>00136 fGuard.Wait();
<a name="l00137"></a>00137 <span class="comment">/* and we're done */</span>
<a name="l00138"></a>00138 fGuard.Unlock();
<a name="l00139"></a>00139 }
<a name="l00140"></a>00140
<a name="l00141"></a>00141 };
<a name="l00142"></a>00142
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