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<!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>buffer_sh.h Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.2.18 --><center><a class="qindex" href="index.html">Main Page</a> <a class="qindex" href="hierarchy.html">Class Hierarchy</a> <a class="qindex" href="annotated.html">Compound List</a> <a class="qindex" href="files.html">File List</a> <a class="qindex" href="functions.html">Compound Members</a> <a class="qindex" href="globals.html">File Members</a> </center><hr><h1>buffer_sh.h</h1><div class="fragment"><pre>00001 <span class="comment">/*</span>00002 <span class="comment"> ZIG - An extendable, portable game engine focused on networking & scripting</span>00003 <span class="comment"> Project Home: http://zige.sourceforge.net</span>00004 <span class="comment"> Copyright (C) 2002 F醔io Reis Cecin <fcecin AT inf DOT ufrgs DOT br></span>00005 <span class="comment"></span>00006 <span class="comment"> This library is free software; you can redistribute it and/or</span>00007 <span class="comment"> modify it under the terms of the GNU Lesser General Public</span>00008 <span class="comment"> License as published by the Free Software Foundation; either</span>00009 <span class="comment"> version 2.1 of the License, or (at your option) any later version.</span>00010 <span class="comment"></span>00011 <span class="comment"> This library is distributed in the hope that it will be useful,</span>00012 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>00013 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>00014 <span class="comment"> Lesser General Public License for more details.</span>00015 <span class="comment"></span>00016 <span class="comment"> You should have received a copy of the GNU Lesser General Public</span>00017 <span class="comment"> License along with this library; if not, write to the Free Software</span>00018 <span class="comment"> Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA </span>00019 <span class="comment">*/</span>00020 <span class="comment">/*</span>00021 <span class="comment"></span>00022 <span class="comment"> buffer.h / shared version</span>00023 <span class="comment"></span>00024 <span class="comment">*/</span>00025 00026 <span class="preprocessor">#ifndef NO_DOXYGEN // not working; exclude from doxygen</span>00027 <span class="preprocessor"></span>00028 <span class="comment">// includes</span>00029 <span class="preprocessor">#include "shared.h"</span>00030 <span class="preprocessor">#include "thread.h"</span>00031 <span class="preprocessor">#include <string></span>00032 <span class="comment">//using namespace std; FIXME</span>00033 00034 <span class="comment">//this is the buffer's allocation unit. if big: less alocation, more wasted memory. if small, too much</span>00035 <span class="comment">//allocation, possibly less wasted memory</span>00036 <span class="preprocessor">#define BUFFER_CHUNK_SIZE 128</span>00037 <span class="preprocessor"></span>00038 <span class="keyword">extern</span> mutex_c cbuffer_mutex;00039 <span class="keyword">extern</span> <span class="keyword">volatile</span> <span class="keywordtype">int</span> cbuffer_count;00040 <span class="keyword">extern</span> <span class="keyword">volatile</span> <span class="keywordtype">int</span> cbuffer_totmem;00041 <span class="keyword">extern</span> <span class="keyword">volatile</span> <span class="keywordtype">int</span> cbuffer_maxmem;00042 00043 <span class="keywordtype">void</span> check_cbuffer_maxmem(<span class="keywordtype">int</span> yeah);00044 00045 <span class="comment">// shared buffer reg - a growable buffer</span>00046 <span class="keyword">class </span>buffer_t {00047 <span class="keyword">public</span>:00048 <span class="keywordtype">char</span> *data; <span class="comment">//pointer to buffer</span>00049 <span class="keywordtype">int</span> alen; <span class="comment">//allocated length</span>00050 <span class="keywordtype">int</span> ulen; <span class="comment">//used length</span>00051 buffer_t() {00052 data = 0;00053 alen = 0;00054 ulen = 0;00055 }00056 };00057 00059 <span class="comment">//concrete subclass of shared_c</span>00060 <span class="keyword">class </span><a class="code" href="classbuffer__c.html">buffer_c</a> : <span class="keyword">public</span> shared_c {00061 <span class="keyword">public</span>:00062 00064 <a class="code" href="classbuffer__c.html#a0">buffer_c</a>();00065 00067 <a class="code" href="classbuffer__c.html#a0">buffer_c</a>(<span class="keywordtype">int</span> <a class="code" href="classbuffer__c.html#a14">size</a>);00068 00070 <a class="code" href="classbuffer__c.html#a0">buffer_c</a>(<span class="keyword">const</span> <a class="code" href="classbuffer__c.html">buffer_c</a> &b);00071 00073 <a class="code" href="classbuffer__c.html">buffer_c</a>& <a class="code" href="classbuffer__c.html#a3">operator=</a>(<span class="keyword">const</span> <a class="code" href="classbuffer__c.html">buffer_c</a> &b);00074 00076 <span class="keyword">virtual</span> <a class="code" href="classbuffer__c.html#a4">~buffer_c</a>();00077 00081 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a5">wrap</a>(<span class="keywordtype">char</span> *buffer, <span class="keywordtype">int</span> buffer_size);00082 00084 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a6">purge</a>() {00085 writeAnnounce();00086 <span class="keywordflow">if</span> (buf.data != 0) {00087 00088 cbuffer_mutex.lock();00089 cbuffer_totmem -= buf.alen;00090 cbuffer_mutex.unlock();00091 00092 <span class="keyword">delete</span> buf.data; 00093 buf.data = 0; 00094 } 00095 buf.ulen = buf.alen = pos = 0;00096 }00097 00099 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a9">clear</a>() { writeAnnounce(); buf.ulen = pos = 0; }00100 00102 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a10">seek</a>(<span class="keywordtype">int</span> ptarg) { pos = ptarg; }00103 00105 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a11">seek_end</a>() { <a class="code" href="classbuffer__c.html#a10">seek</a>( <a class="code" href="classbuffer__c.html#a14">size</a>() ); }00106 00108 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a12">skip</a>(<span class="keywordtype">int</span> amount) { <a class="code" href="classbuffer__c.html#a10">seek</a>( <a class="code" href="classbuffer__c.html#a13">getpos</a>() + amount ); }00109 00111 <span class="keywordtype">int</span> <a class="code" href="classbuffer__c.html#a13">getpos</a>() { <span class="keywordflow">return</span> pos; }00112 00114 <span class="keywordtype">int</span> <a class="code" href="classbuffer__c.html#a14">size</a>() { <span class="keywordflow">return</span> buf.ulen; }00115 00117 <span class="keywordtype">int</span> <a class="code" href="classbuffer__c.html#a15">size_left</a>() { <span class="keywordflow">return</span> (buf.ulen - pos); }00118 00120 <span class="keywordtype">char</span> *<a class="code" href="classbuffer__c.html#a16">data</a>();00121 00123 <span class="keywordtype">char</span> *<a class="code" href="classbuffer__c.html#a17">data_cur</a>();00124 00126 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a18">manual_put_block</a>(<span class="keywordtype">int</span> amount) { buf.ulen += amount; pos += amount; <span class="keywordflow">if</span> (buf.ulen > buf.alen) <a class="code" href="utils_8h.html#a1">FAILSTOP</a>(); }00127 00129 NLubyte <a class="code" href="classbuffer__c.html#a19">getByte</a>();00130 00132 NLbyte <a class="code" href="classbuffer__c.html#a20">getBytes</a>();00133 00135 NLushort <a class="code" href="classbuffer__c.html#a21">getShort</a>();00136 00138 NLshort <a class="code" href="classbuffer__c.html#a22">getShorts</a>();00139 00141 NLulong <a class="code" href="classbuffer__c.html#a23">getLong</a>();00142 00144 NLlong <a class="code" href="classbuffer__c.html#a24">getLongs</a>();00145 00147 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a27">getBlock</a>(<span class="keywordtype">char</span> *buffer, <span class="keywordtype">int</span> length);00148 00150 string <a class="code" href="classbuffer__c.html#a28">getString</a>();00151 00153 <span class="keywordtype">int</span> <a class="code" href="classbuffer__c.html#a29">getDataToSocket</a>(NLsocket sock, <span class="keywordtype">int</span> length);00154 00156 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a50">putByte</a>(NLubyte i);00157 00159 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a51">putBytes</a>(NLbyte i);00160 00162 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a52">putShort</a>(NLushort i);00163 00165 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a53">putShorts</a>(NLshort i);00166 00168 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a54">putLong</a>(NLulong i);00169 00171 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a55">putLongs</a>(NLlong i);00172 00174 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a58">putBlock</a>(<span class="keywordtype">char</span> *buffer, <span class="keywordtype">int</span> length);00175 00177 <span class="keywordtype">void</span> <a class="code" href="classbuffer__c.html#a59">putString</a>(string str);00178 00182 <span class="keywordtype">int</span> <a class="code" href="classbuffer__c.html#a60">putDataFromSocket</a>(NLsocket sock);00183 00187 <span class="keywordtype">int</span> <a class="code" href="classbuffer__c.html#a60">putDataFromSocket</a>(NLsocket sock, <span class="keywordtype">int</span> <a class="code" href="classbuffer__c.html#a14">size</a>);00188 00190 <span class="keywordtype">int</span> <a class="code" href="classbuffer__c.html#m0">code</a>, <a class="code" href="classbuffer__c.html#m1">id</a>, <a class="code" href="classbuffer__c.html#m2">internal</a>;00191 00192 <span class="keyword">protected</span>:00193 00194 <span class="comment">//delete shared object (last client's destructor called). MUST BE OVERRIDEN</span>00195 <span class="keyword">virtual</span> <span class="keywordtype">void</span> deleteSharedObject();00196 00197 <span class="comment">//make a private copy of the object -- prior to writing/updating when there </span>00198 <span class="comment">//is more than one reference. MUST BE OVERRIDEN</span>00199 <span class="keyword">virtual</span> <span class="keywordtype">void</span> copySharedObject();00200 00201 <span class="comment">//make a shallow copy -- MUST BE OVERRIDEN</span>00202 <span class="keyword">virtual</span> <span class="keywordtype">void</span> shallowCopyObject(shared_c *other) {00203 00204 <a class="code" href="classbuffer__c.html">buffer_c</a> *b = (<a class="code" href="classbuffer__c.html">buffer_c</a>*)other;00205 assert(b);00206 <span class="comment">//CHANGED: let's copy pos too</span>00207 pos = b-><a class="code" href="classbuffer__c.html#n1">pos</a>; <span class="comment">//moved to shallow copy obj</span>00208 buf = b-><a class="code" href="classbuffer__c.html#n0">buf</a>;00209 <a class="code" href="classbuffer__c.html#m0">code</a> = b-><a class="code" href="classbuffer__c.html#m0">code</a>;00210 <a class="code" href="classbuffer__c.html#m1">id</a> = b-><a class="code" href="classbuffer__c.html#m1">id</a>;00211 <a class="code" href="classbuffer__c.html#m2">internal</a> = b-><a class="code" href="classbuffer__c.html#m2">internal</a>;00212 }00213 00214 <span class="comment">//make buffer grow if needed, to make room for more "amount" bytes of data at "pos"</span>00215 <span class="keywordtype">void</span> grow(<span class="keywordtype">long</span> amount, <span class="keywordtype">bool</span> writing = <span class="keyword">true</span>);00216 00217 <span class="comment">//buffer struct: NOT a handle (speeeed!!)</span>00218 buffer_t buf;00219 00220 <span class="comment">//seek cursor in buffer</span>00221 <span class="keywordtype">long</span> pos;00222 };00223 00224 <span class="preprocessor">#endif // #ifndef NO_DOXYGEN // not working; exclude from doxygen</span>00225 <span class="preprocessor"></span></pre></div><hr><address style="align: right;"><small>Generated on Mon Jan 24 21:14:23 2005 for ZIG by<a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border=0 width=110 height=53></a>1.2.18 </small></address></body></html>⌨️ 快捷键说明
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