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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>sync.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> </center><hr><h1>sync.h</h1><div class="fragment"><pre>00001 <span class="comment">//-< SYNC.H >--------------------------------------------------------*--------*</span>00002 <span class="comment">// FastDB Version 1.0 (c) 1999 GARRET * ? *</span>00003 <span class="comment">// (Main Memory Database Management System) * /\| *</span>00004 <span class="comment">// * / \ *</span>00005 <span class="comment">// Created: 20-Nov-98 K.A. Knizhnik * / [] \ *</span>00006 <span class="comment">// Last update: 20-Dec-98 K.A. Knizhnik * GARRET *</span>00007 <span class="comment">//-------------------------------------------------------------------*--------*</span>00008 <span class="comment">// Intertask synchonization primitives</span>00009 <span class="comment">//-------------------------------------------------------------------*--------*</span>00010 00011 <span class="preprocessor">#ifndef __SYNC_H__</span>00012 <span class="preprocessor"></span><span class="preprocessor">#define __SYNC_H__</span>00013 <span class="preprocessor"></span>00014 <span class="preprocessor">#ifdef _WIN32</span>00015 <span class="preprocessor"></span><span class="preprocessor">#include "sync_w32.h"</span> 00016 <span class="preprocessor">#else // Unix</span>00017 <span class="preprocessor"></span><span class="preprocessor">#include "sync_unix.h"</span>00018 <span class="preprocessor">#endif</span>00019 <span class="preprocessor"></span>00020 BEGIN_FASTDB_NAMESPACE00021 00022 <span class="keyword">class </span>FASTDB_DLL_ENTRY dbSystem { 00023 <span class="keyword">public</span>:00024 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> getCurrentTimeMsec();00025 };00026 00027 <span class="comment">// Common decls for all platforms</span>00028 <span class="keyword">class </span>FASTDB_DLL_ENTRY dbCriticalSection { 00029 <span class="keyword">private</span>:00030 dbMutex& mutex;00031 <span class="keyword">public</span>:00032 dbCriticalSection(dbMutex& guard) : mutex(guard) {00033 mutex.lock();00034 }00035 ~dbCriticalSection() { 00036 mutex.unlock();00037 }00038 };00039 00040 <span class="preprocessor">#define SMALL_BUF_SIZE 512</span>00041 <span class="preprocessor"></span>00042 <span class="keyword">class </span>FASTDB_DLL_ENTRY dbSmallBuffer { 00043 <span class="keyword">protected</span>:00044 <span class="keywordtype">char</span> smallBuf[SMALL_BUF_SIZE];00045 <span class="keywordtype">char</span>* buf;00046 size_t used;00047 00048 <span class="keyword">public</span>:00049 dbSmallBuffer(size_t size) { 00050 <span class="keywordflow">if</span> (size > SMALL_BUF_SIZE) { 00051 buf = <span class="keyword">new</span> <span class="keywordtype">char</span>[size];00052 } <span class="keywordflow">else</span> { 00053 buf = smallBuf;00054 }00055 used = size;00056 }00057 00058 dbSmallBuffer() { 00059 used = 0;00060 buf = smallBuf;00061 }00062 00063 <span class="keywordtype">void</span> put(size_t size) { 00064 <span class="keywordflow">if</span> (size > SMALL_BUF_SIZE && size > used) { 00065 <span class="keywordflow">if</span> (buf != smallBuf) { 00066 <span class="keyword">delete</span>[] buf;00067 }00068 buf = <span class="keyword">new</span> <span class="keywordtype">char</span>[size];00069 used = size;00070 }00071 }00072 00073 operator char*() { <span class="keywordflow">return</span> buf; }00074 <span class="keywordtype">char</span>* base() { <span class="keywordflow">return</span> buf; }00075 00076 ~dbSmallBuffer() { 00077 <span class="keywordflow">if</span> (buf != smallBuf) { 00078 <span class="keyword">delete</span>[] buf;00079 }00080 }00081 };00082 00083 <span class="keyword">class </span>dbThreadPool;00084 00085 <span class="keyword">class </span>FASTDB_DLL_ENTRY dbPooledThread { 00086 <span class="keyword">private</span>:00087 <span class="keyword">friend</span> <span class="keyword">class </span>dbThreadPool;00088 00089 dbThread thread;00090 dbThreadPool* pool;00091 dbPooledThread* next;00092 dbThread::thread_proc_t f;00093 <span class="keywordtype">void</span>* arg;00094 <span class="keywordtype">bool</span> running;00095 dbLocalSemaphore startSem;00096 dbLocalSemaphore readySem;00097 00098 <span class="keyword">static</span> <span class="keywordtype">void</span> thread_proc pooledThreadFunc(<span class="keywordtype">void</span>* arg);00099 00100 <span class="keywordtype">void</span> run();00101 <span class="keywordtype">void</span> stop();00102 00103 dbPooledThread(dbThreadPool* threadPool); 00104 ~dbPooledThread(); 00105 };00106 00107 <span class="keyword">class </span>FASTDB_DLL_ENTRY dbThreadPool { 00108 <span class="keyword">friend</span> <span class="keyword">class </span>dbPooledThread;00109 dbPooledThread* freeThreads;00110 dbMutex mutex;00111 00112 <span class="keyword">public</span>:00113 dbPooledThread* create(dbThread::thread_proc_t f, <span class="keywordtype">void</span>* arg);00114 <span class="keywordtype">void</span> join(dbPooledThread* thr);00115 dbThreadPool();00116 ~dbThreadPool();00117 }; 00118 00119 END_FASTDB_NAMESPACE00120 00121 <span class="preprocessor">#endif // __SYNC_H__</span>00122 <span class="preprocessor"></span>00123 </pre></div><hr><address style="align: right;"><small>Generated on Mon Oct 23 13:23:58 2006 for FastDB 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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