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<div id="projectname">Jack2 <span id="projectnumber">1.9.7</span></div>
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<h1>JackShmMem.h</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) 2004-2008 Grame</span>
<a name="l00003"></a>00003 <span class="comment"> </span>
<a name="l00004"></a>00004 <span class="comment"> This program is free software; you can redistribute it and/or modify</span>
<a name="l00005"></a>00005 <span class="comment"> it under the terms of the GNU Lesser General Public License as published by</span>
<a name="l00006"></a>00006 <span class="comment"> the Free Software Foundation; either version 2.1 of the License, or</span>
<a name="l00007"></a>00007 <span class="comment"> (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 program 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</span>
<a name="l00012"></a>00012 <span class="comment"> GNU Lesser 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 Lesser General Public License</span>
<a name="l00015"></a>00015 <span class="comment"> along with this program; if not, write to the Free Software </span>
<a name="l00016"></a>00016 <span class="comment"> Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.</span>
<a name="l00017"></a>00017 <span class="comment"> </span>
<a name="l00018"></a>00018 <span class="comment"> */</span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="preprocessor">#ifndef __JackShmMem__</span>
<a name="l00021"></a>00021 <span class="preprocessor"></span><span class="preprocessor">#define __JackShmMem__</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span>
<a name="l00023"></a>00023 <span class="preprocessor">#include "shm.h"</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "JackError.h"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "JackCompilerDeps.h"</span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="preprocessor">#include <new></span> <span class="comment">// GCC 4.0</span>
<a name="l00028"></a>00028 <span class="preprocessor">#include <errno.h></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="preprocessor">#include "JackShmMem_os.h"</span>
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="keyword">namespace </span>Jack
<a name="l00034"></a>00034 {
<a name="l00035"></a>00035
<a name="l00036"></a>00036 SERVER_EXPORT <span class="keywordtype">void</span> LockMemoryImp(<span class="keywordtype">void</span>* ptr, <span class="keywordtype">size_t</span> size);
<a name="l00037"></a>00037 SERVER_EXPORT <span class="keywordtype">void</span> InitLockMemoryImp(<span class="keywordtype">void</span>* ptr, <span class="keywordtype">size_t</span> size);
<a name="l00038"></a>00038 SERVER_EXPORT <span class="keywordtype">void</span> UnlockMemoryImp(<span class="keywordtype">void</span>* ptr, <span class="keywordtype">size_t</span> size);
<a name="l00039"></a>00039 SERVER_EXPORT <span class="keywordtype">void</span> LockAllMemory();
<a name="l00040"></a>00040 SERVER_EXPORT <span class="keywordtype">void</span> UnlockAllMemory();
<a name="l00041"></a>00041
<a name="l00042"></a><a class="code" href="classJack_1_1JackMem.html">00042</a> <span class="keyword">class </span><a class="code" href="classJack_1_1JackMem.html">JackMem</a>
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044 <span class="keyword">private</span>:
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="keywordtype">size_t</span> fSize;
<a name="l00047"></a>00047 <span class="keyword">static</span> <span class="keywordtype">size_t</span> gSize;
<a name="l00048"></a>00048
<a name="l00049"></a>00049 <span class="keyword">protected</span>:
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <a class="code" href="classJack_1_1JackMem.html">JackMem</a>(): fSize(gSize)
<a name="l00052"></a>00052 {}
<a name="l00053"></a>00053 ~<a class="code" href="classJack_1_1JackMem.html">JackMem</a>()
<a name="l00054"></a>00054 {}
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <span class="keyword">public</span>:
<a name="l00057"></a>00057
<a name="l00058"></a>00058 <span class="keywordtype">void</span>* operator new(<span class="keywordtype">size_t</span> size)
<a name="l00059"></a>00059 {
<a name="l00060"></a>00060 gSize = size;
<a name="l00061"></a>00061 <span class="keywordflow">return</span> calloc(1, size);
<a name="l00062"></a>00062 }
<a name="l00063"></a>00063
<a name="l00064"></a>00064 <span class="keywordtype">void</span> operator delete(<span class="keywordtype">void</span>* ptr, <span class="keywordtype">size_t</span> size)
<a name="l00065"></a>00065 {
<a name="l00066"></a>00066 free(ptr);
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="keywordtype">void</span> LockMemory()
<a name="l00070"></a>00070 {
<a name="l00071"></a>00071 LockMemoryImp(<span class="keyword">this</span>, fSize);
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="keywordtype">void</span> UnlockMemory()
<a name="l00075"></a>00075 {
<a name="l00076"></a>00076 UnlockMemoryImp(<span class="keyword">this</span>, fSize);
<a name="l00077"></a>00077 }
<a name="l00078"></a>00078
<a name="l00079"></a>00079 };
<a name="l00080"></a>00080
<a name="l00087"></a><a class="code" href="classJack_1_1JackShmMemAble.html">00087</a> <span class="keyword">class </span><a class="code" href="classJack_1_1JackShmMemAble.html" title="A class which objects possibly want to be allocated in shared memory derives from this class...">JackShmMemAble</a>
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 <span class="keyword">protected</span>:
<a name="l00090"></a>00090
<a name="l00091"></a>00091 <a class="code" href="struct__jack__shm__info.html">jack_shm_info_t</a> fInfo;
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="keyword">public</span>:
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="keywordtype">void</span> Init();
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="keywordtype">int</span> GetShmIndex()
<a name="l00098"></a>00098 {
<a name="l00099"></a>00099 <span class="keywordflow">return</span> fInfo.index;
<a name="l00100"></a>00100 }
<a name="l00101"></a>00101
<a name="l00102"></a>00102 <span class="keywordtype">char</span>* GetShmAddress()
<a name="l00103"></a>00103 {
<a name="l00104"></a>00104 <span class="keywordflow">return</span> (<span class="keywordtype">char</span>*)fInfo.ptr.attached_at;
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="keywordtype">void</span> LockMemory()
<a name="l00108"></a>00108 {
<a name="l00109"></a>00109 LockMemoryImp(<span class="keyword">this</span>, fInfo.size);
<a name="l00110"></a>00110 }
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="keywordtype">void</span> UnlockMemory()
<a name="l00113"></a>00113 {
<a name="l00114"></a>00114 UnlockMemoryImp(<span class="keyword">this</span>, fInfo.size);
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116
<a name="l00117"></a>00117 };
<a name="l00118"></a>00118
<a name="l00125"></a><a class="code" href="classJack_1_1JackShmMem.html">00125</a> <span class="keyword">class </span>SERVER_EXPORT <a class="code" href="classJack_1_1JackShmMem.html" title="The base class for shared memory management.">JackShmMem</a> : <span class="keyword">public</span> <a class="code" href="classJack_1_1JackShmMemAble.html" title="A class which objects possibly want to be allocated in shared memory derives from this class...">JackShmMemAble</a>
<a name="l00126"></a>00126 {
<a name="l00127"></a>00127
<a name="l00128"></a>00128 <span class="keyword">protected</span>:
<a name="l00129"></a>00129
<a name="l00130"></a>00130 <a class="code" href="classJack_1_1JackShmMem.html" title="The base class for shared memory management.">JackShmMem</a>();
<a name="l00131"></a>00131 ~<a class="code" href="classJack_1_1JackShmMem.html" title="The base class for shared memory management.">JackShmMem</a>();
<a name="l00132"></a>00132
<a name="l00133"></a>00133 <span class="keyword">public</span>:
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="keywordtype">void</span>* operator new(<span class="keywordtype">size_t</span> size);
<a name="l00136"></a>00136 <span class="keywordtype">void</span>* operator new(<span class="keywordtype">size_t</span> size, <span class="keywordtype">void</span>* memory);
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="keywordtype">void</span> operator delete(<span class="keywordtype">void</span>* p, <span class="keywordtype">size_t</span> size);
<a name="l00139"></a>00139 <span class="keywordtype">void</span> operator delete(<span class="keywordtype">void</span>* p);
<a name="l00140"></a>00140
<a name="l00141"></a>00141 };
<a name="l00142"></a>00142
<a name="l00147"></a>00147 <span class="keyword">template</span> <<span class="keyword">class</span> T>
<a name="l00148"></a><a class="code" href="classJack_1_1JackShmReadWritePtr.html">00148</a> <span class="keyword">class </span><a class="code" href="classJack_1_1JackShmReadWritePtr.html" title="Pointer on shared memory segment in the client side.">JackShmReadWritePtr</a>
<a name="l00149"></a>00149 {
<a name="l00150"></a>00150
<a name="l00151"></a>00151 <span class="keyword">private</span>:
<a name="l00152"></a>00152
<a name="l00153"></a>00153 <a class="code" href="struct__jack__shm__info.html">jack_shm_info_t</a> fInfo;
<a name="l00154"></a>00154
<a name="l00155"></a>00155 <span class="keywordtype">void</span> Init(<span class="keywordtype">int</span> index, <span class="keyword">const</span> <span class="keywordtype">char</span>* server_name = <span class="stringliteral">"default"</span>)
<a name="l00156"></a>00156 {
<a name="l00157"></a>00157 <span class="keywordflow">if</span> (fInfo.index < 0 && index >= 0) {
<a name="l00158"></a>00158 <a class="code" href="group__ServerControl.html#ga35f69faaee3bb9b958ed8c9a5f62246c">jack_log</a>(<span class="stringliteral">"JackShmReadWritePtr::Init %ld %ld"</span>, index, fInfo.index);
<a name="l00159"></a>00159 <span class="keywordflow">if</span> (jack_initialize_shm(server_name) < 0)
<a name="l00160"></a>00160 <span class="keywordflow">throw</span> - 1;
<a name="l00161"></a>00161 fInfo.index = index;
<a name="l00162"></a>00162 <span class="keywordflow">if</span> (jack_attach_shm(&fInfo)) {
<a name="l00163"></a>00163 <span class="keywordflow">throw</span> - 2;
<a name="l00164"></a>00164 }
<a name="l00165"></a>00165 GetShmAddress()->LockMemory();
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167 }
<a name="l00168"></a>00168
<a name="l00169"></a>00169 <span class="keyword">public</span>:
<a name="l00170"></a>00170
<a name="l00171"></a>00171 <a class="code" href="classJack_1_1JackShmReadWritePtr.html" title="Pointer on shared memory segment in the client side.">JackShmReadWritePtr</a>()
<a name="l00172"></a>00172 {
<a name="l00173"></a>00173 fInfo.index = -1;
<a name="l00174"></a>00174 fInfo.ptr.attached_at = (<span class="keywordtype">char</span>*)NULL;
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176
<a name="l00177"></a>00177 <a class="code" href="classJack_1_1JackShmReadWritePtr.html" title="Pointer on shared memory segment in the client side.">JackShmReadWritePtr</a>(<span class="keywordtype">int</span> index, <span class="keyword">const</span> <span class="keywordtype">char</span>* server_name)
<a name="l00178"></a>00178 {
<a name="l00179"></a>00179 Init(index, server_name);
<a name="l00180"></a>00180 }
<a name="l00181"></a>00181
<a name="l00182"></a>00182 ~<a class="code" href="classJack_1_1JackShmReadWritePtr.html" title="Pointer on shared memory segment in the client side.">JackShmReadWritePtr</a>()
<a name="l00183"></a>00183 {
<a name="l00184"></a>00184 <span class="keywordflow">if</span> (fInfo.index >= 0) {
<a name="l00185"></a>00185 <a class="code" href="group__ServerControl.html#ga35f69faaee3bb9b958ed8c9a5f62246c">jack_log</a>(<span class="stringliteral">"JackShmReadWritePtr::~JackShmReadWritePtr %ld"</span>, fInfo.index);
<a name="l00186"></a>00186 GetShmAddress()->UnlockMemory();
<a name="l00187"></a>00187 jack_release_shm(&fInfo);
<a name="l00188"></a>00188 fInfo.index = -1;
<a name="l00189"></a>00189 }
<a name="l00190"></a>00190 }
<a name="l00191"></a>00191
<a name="l00192"></a>00192 T* operator->()<span class="keyword"> const</span>
<a name="l00193"></a>00193 <span class="keyword"> </span>{
<a name="l00194"></a>00194 <span class="keywordflow">return</span> (T*)fInfo.ptr.attached_at;
<a name="l00195"></a>00195 }
<a name="l00196"></a>00196
<a name="l00197"></a>00197 operator T*()<span class="keyword"> const</span>
<a name="l00198"></a>00198 <span class="keyword"> </span>{
<a name="l00199"></a>00199 <span class="keywordflow">return</span> (T*)fInfo.ptr.attached_at;
<a name="l00200"></a>00200 }
<a name="l00201"></a>00201
<a name="l00202"></a>00202 <a class="code" href="classJack_1_1JackShmReadWritePtr.html" title="Pointer on shared memory segment in the client side.">JackShmReadWritePtr</a>& operator=(<span class="keywordtype">int</span> index)
<a name="l00203"></a>00203 {
<a name="l00204"></a>00204 Init(index);
<a name="l00205"></a>00205 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
<a name="l00206"></a>00206 }
<a name="l00207"></a>00207
<a name="l00208"></a>00208 <span class="keywordtype">void</span> SetShmIndex(<span class="keywordtype">int</span> index, <span class="keyword">const</span> <span class="keywordtype">char</span>* server_name)
<a name="l00209"></a>00209 {
<a name="l00210"></a>00210 Init(index, server_name);
<a name="l00211"></a>00211 }
<a name="l00212"></a>00212
<a name="l00213"></a>00213 <span class="keywordtype">int</span> GetShmIndex()
<a name="l00214"></a>00214 {
<a name="l00215"></a>00215 <span class="keywordflow">return</span> fInfo.index;
<a name="l00216"></a>00216 }
<a name="l00217"></a>00217
<a name="l00218"></a>00218 T* GetShmAddress()
<a name="l00219"></a>00219 {
<a name="l00220"></a>00220 <span class="keywordflow">return</span> (T*)fInfo.ptr.attached_at;
<a name="l00221"></a>00221 }
<a name="l00222"></a>00222 };
<a name="l00223"></a>00223
<a name="l00228"></a>00228 <span class="keyword">template</span> <<span class="keyword">class</span> T>
<a name="l00229"></a><a class="code" href="classJack_1_1JackShmReadWritePtr1.html">00229</a> <span class="keyword">class </span><a class="code" href="classJack_1_1JackShmReadWritePtr1.html" title="Pointer on shared memory segment in the client side: destroy the segment (used client control)...">JackShmReadWritePtr1</a>
<a name="l00230"></a>00230 {
<a name="l00231"></a>00231
<a name="l00232"></a>00232 <span class="keyword">private</span>:
<a name="l00233"></a>00233
<a name="l00234"></a>00234 <a class="code" href="struct__jack__shm__info.html">jack_shm_info_t</a> fInfo;
<a name="l00235"></a>00235
<a name="l00236"></a>00236 <span class="keywordtype">void</span> Init(<span class="keywordtype">int</span> index, <span class="keyword">const</span> <span class="keywordtype">char</span>* server_name = <span class="stringliteral">"default"</span>)
<a name="l00237"></a>00237 {
<a name="l00238"></a>00238 <span class="keywordflow">if</span> (fInfo.index < 0 && index >= 0) {
<a name="l00239"></a>00239 <a class="code" href="group__ServerControl.html#ga35f69faaee3bb9b958ed8c9a5f62246c">jack_log</a>(<span class="stringliteral">"JackShmReadWritePtr1::Init %ld %ld"</span>, index, fInfo.index);
<a name="l00240"></a>00240 <span class="keywordflow">if</span> (jack_initialize_shm(server_name) < 0)
<a name="l00241"></a>00241 <span class="keywordflow">throw</span> - 1;
<a name="l00242"></a>00242 fInfo.index = index;
<a name="l00243"></a>00243 <span class="keywordflow">if</span> (jack_attach_shm(&fInfo)) {
<a name="l00244"></a>00244 <span class="keywordflow">throw</span> - 2;
<a name="l00245"></a>00245 }
<a name="l00246"></a>00246 <span class="comment">/*</span>
<a name="l00247"></a>00247 <span class="comment"> nobody else needs to access this shared memory any more, so</span>
<a name="l00248"></a>00248 <span class="comment"> destroy it. because we have our own attachment to it, it won't</span>
<a name="l00249"></a>00249 <span class="comment"> vanish till we exit (and release it).</span>
<a name="l00250"></a>00250 <span class="comment"> */</span>
<a name="l00251"></a>00251 jack_destroy_shm(&fInfo);
<a name="l00252"></a>00252 GetShmAddress()->LockMemory();
<a name="l00253"></a>00253 }
<a name="l00254"></a>00254 }
<a name="l00255"></a>00255
<a name="l00256"></a>00256 <span class="keyword">public</span>:
<a name="l00257"></a>00257
<a name="l00258"></a>00258 <a class="code" href="classJack_1_1JackShmReadWritePtr1.html" title="Pointer on shared memory segment in the client side: destroy the segment (used client control)...">JackShmReadWritePtr1</a>()
<a name="l00259"></a>00259 {
<a name="l00260"></a>00260 fInfo.index = -1;
<a name="l00261"></a>00261 fInfo.ptr.attached_at = NULL;
<a name="l00262"></a>00262 }
<a name="l00263"></a>00263
<a name="l00264"></a>00264 <a class="code" href="classJack_1_1JackShmReadWritePtr1.html" title="Pointer on shared memory segment in the client side: destroy the segment (used client control)...">JackShmReadWritePtr1</a>(<span class="keywordtype">int</span> index, <span class="keyword">const</span> <span class="keywordtype">char</span>* server_name)
<a name="l00265"></a>00265 {
<a name="l00266"></a>00266 Init(index, server_name);
<a name="l00267"></a>00267 }
<a name="l00268"></a>00268
<a name="l00269"></a>00269 ~<a class="code" href="classJack_1_1JackShmReadWritePtr1.html" title="Pointer on shared memory segment in the client side: destroy the segment (used client control)...">JackShmReadWritePtr1</a>()
<a name="l00270"></a>00270 {
<a name="l00271"></a>00271 <span class="keywordflow">if</span> (fInfo.index >= 0) {
<a name="l00272"></a>00272 <a class="code" href="group__ServerControl.html#ga35f69faaee3bb9b958ed8c9a5f62246c">jack_log</a>(<span class="stringliteral">"JackShmReadWritePtr1::~JackShmReadWritePtr1 %ld"</span>, fInfo.index);
<a name="l00273"></a>00273 GetShmAddress()->UnlockMemory();
<a name="l00274"></a>00274 jack_release_shm(&fInfo);
<a name="l00275"></a>00275 fInfo.index = -1;
<a name="l00276"></a>00276 }
<a name="l00277"></a>00277 }
<a name="l00278"></a>00278
<a name="l00279"></a>00279 T* operator->()<span class="keyword"> const</span>
<a name="l00280"></a>00280 <span class="keyword"> </span>{
<a name="l00281"></a>00281 <span class="keywordflow">return</span> (T*)fInfo.ptr.attached_at;
<a name="l00282"></a>00282 }
<a name="l00283"></a>00283
<a name="l00284"></a>00284 operator T*()<span class="keyword"> const</span>
<a name="l00285"></a>00285 <span class="keyword"> </span>{
<a name="l00286"></a>00286 <span class="keywordflow">return</span> (T*)fInfo.ptr.attached_at;
<a name="l00287"></a>00287 }
<a name="l00288"></a>00288
<a name="l00289"></a>00289 <a class="code" href="classJack_1_1JackShmReadWritePtr1.html" title="Pointer on shared memory segment in the client side: destroy the segment (used client control)...">JackShmReadWritePtr1</a>& operator=(<span class="keywordtype">int</span> index)
<a name="l00290"></a>00290 {
<a name="l00291"></a>00291 Init(index);
<a name="l00292"></a>00292 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
<a name="l00293"></a>00293 }
<a name="l00294"></a>00294
<a name="l00295"></a>00295 <span class="keywordtype">void</span> SetShmIndex(<span class="keywordtype">int</span> index, <span class="keyword">const</span> <span class="keywordtype">char</span>* server_name)
<a name="l00296"></a>00296 {
<a name="l00297"></a>00297 Init(index, server_name);
<a name="l00298"></a>00298 }
<a name="l00299"></a>00299
<a name="l00300"></a>00300 <span class="keywordtype">int</span> GetShmIndex()
<a name="l00301"></a>00301 {
<a name="l00302"></a>00302 <span class="keywordflow">return</span> fInfo.index;
<a name="l00303"></a>00303 }
<a name="l00304"></a>00304
<a name="l00305"></a>00305 T* GetShmAddress()
<a name="l00306"></a>00306 {
<a name="l00307"></a>00307 <span class="keywordflow">return</span> (T*)fInfo.ptr.attached_at;
<a name="l00308"></a>00308 }
<a name="l00309"></a>00309 };
<a name="l00310"></a>00310
<a name="l00315"></a>00315 <span class="keyword">template</span> <<span class="keyword">class</span> T>
<a name="l00316"></a><a class="code" href="classJack_1_1JackShmReadPtr.html">00316</a> <span class="keyword">class </span><a class="code" href="classJack_1_1JackShmReadPtr.html" title="Pointer on shared memory segment in the client side.">JackShmReadPtr</a>
<a name="l00317"></a>00317 {
<a name="l00318"></a>00318
<a name="l00319"></a>00319 <span class="keyword">private</span>:
<a name="l00320"></a>00320
<a name="l00321"></a>00321 <a class="code" href="struct__jack__shm__info.html">jack_shm_info_t</a> fInfo;
<a name="l00322"></a>00322
<a name="l00323"></a>00323 <span class="keywordtype">void</span> Init(<span class="keywordtype">int</span> index, <span class="keyword">const</span> <span class="keywordtype">char</span>* server_name = <span class="stringliteral">"default"</span>)
<a name="l00324"></a>00324 {
<a name="l00325"></a>00325 <span class="keywordflow">if</span> (fInfo.index < 0 && index >= 0) {
<a name="l00326"></a>00326 <a class="code" href="group__ServerControl.html#ga35f69faaee3bb9b958ed8c9a5f62246c">jack_log</a>(<span class="stringliteral">"JackShmPtrRead::Init %ld %ld"</span>, index, fInfo.index);
<a name="l00327"></a>00327 <span class="keywordflow">if</span> (jack_initialize_shm(server_name) < 0)
<a name="l00328"></a>00328 <span class="keywordflow">throw</span> - 1;
<a name="l00329"></a>00329 fInfo.index = index;
<a name="l00330"></a>00330 <span class="keywordflow">if</span> (jack_attach_shm_read(&fInfo)) {
<a name="l00331"></a>00331 <span class="keywordflow">throw</span> - 2;
<a name="l00332"></a>00332 }
<a name="l00333"></a>00333 GetShmAddress()->LockMemory();
<a name="l00334"></a>00334 }
<a name="l00335"></a>00335 }
<a name="l00336"></a>00336
<a name="l00337"></a>00337 <span class="keyword">public</span>:
<a name="l00338"></a>00338
<a name="l00339"></a>00339 <a class="code" href="classJack_1_1JackShmReadPtr.html" title="Pointer on shared memory segment in the client side.">JackShmReadPtr</a>()
<a name="l00340"></a>00340 {
<a name="l00341"></a>00341 fInfo.index = -1;
<a name="l00342"></a>00342 fInfo.ptr.attached_at = NULL;
<a name="l00343"></a>00343 }
<a name="l00344"></a>00344
<a name="l00345"></a>00345 <a class="code" href="classJack_1_1JackShmReadPtr.html" title="Pointer on shared memory segment in the client side.">JackShmReadPtr</a>(<span class="keywordtype">int</span> index, <span class="keyword">const</span> <span class="keywordtype">char</span>* server_name)
<a name="l00346"></a>00346 {
<a name="l00347"></a>00347 Init(index, server_name);
<a name="l00348"></a>00348 }
<a name="l00349"></a>00349
<a name="l00350"></a>00350 ~<a class="code" href="classJack_1_1JackShmReadPtr.html" title="Pointer on shared memory segment in the client side.">JackShmReadPtr</a>()
<a name="l00351"></a>00351 {
<a name="l00352"></a>00352 <span class="keywordflow">if</span> (fInfo.index >= 0) {
<a name="l00353"></a>00353 <a class="code" href="group__ServerControl.html#ga35f69faaee3bb9b958ed8c9a5f62246c">jack_log</a>(<span class="stringliteral">"JackShmPtrRead::~JackShmPtrRead %ld"</span>, fInfo.index);
<a name="l00354"></a>00354 GetShmAddress()->UnlockMemory();
<a name="l00355"></a>00355 jack_release_shm(&fInfo);
<a name="l00356"></a>00356 fInfo.index = -1;
<a name="l00357"></a>00357 }
<a name="l00358"></a>00358 }
<a name="l00359"></a>00359
<a name="l00360"></a>00360 T* operator->()<span class="keyword"> const</span>
<a name="l00361"></a>00361 <span class="keyword"> </span>{
<a name="l00362"></a>00362 <span class="keywordflow">return</span> (T*)fInfo.ptr.attached_at;
<a name="l00363"></a>00363 }
<a name="l00364"></a>00364
<a name="l00365"></a>00365 operator T*()<span class="keyword"> const</span>
<a name="l00366"></a>00366 <span class="keyword"> </span>{
<a name="l00367"></a>00367 <span class="keywordflow">return</span> (T*)fInfo.ptr.attached_at;
<a name="l00368"></a>00368 }
<a name="l00369"></a>00369
<a name="l00370"></a>00370 <a class="code" href="classJack_1_1JackShmReadPtr.html" title="Pointer on shared memory segment in the client side.">JackShmReadPtr</a>& operator=(<span class="keywordtype">int</span> index)
<a name="l00371"></a>00371 {
<a name="l00372"></a>00372 Init(index);
<a name="l00373"></a>00373 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
<a name="l00374"></a>00374 }
<a name="l00375"></a>00375
<a name="l00376"></a>00376 <span class="keywordtype">void</span> SetShmIndex(<span class="keywordtype">int</span> index, <span class="keyword">const</span> <span class="keywordtype">char</span>* server_name)
<a name="l00377"></a>00377 {
<a name="l00378"></a>00378 Init(index, server_name);
<a name="l00379"></a>00379 }
<a name="l00380"></a>00380
<a name="l00381"></a>00381 <span class="keywordtype">int</span> GetShmIndex()
<a name="l00382"></a>00382 {
<a name="l00383"></a>00383 <span class="keywordflow">return</span> fInfo.index;
<a name="l00384"></a>00384 }
<a name="l00385"></a>00385
<a name="l00386"></a>00386 T* GetShmAddress()
<a name="l00387"></a>00387 {
<a name="l00388"></a>00388 <span class="keywordflow">return</span> (T*)fInfo.ptr.attached_at;
<a name="l00389"></a>00389 }
<a name="l00390"></a>00390
<a name="l00391"></a>00391 };
<a name="l00392"></a>00392
<a name="l00393"></a>00393 } <span class="comment">// end of namespace</span>
<a name="l00394"></a>00394
<a name="l00395"></a>00395 <span class="preprocessor">#endif</span>
</pre></div></div>
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