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<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_NAMESPACE
00021
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_NAMESPACE
00120
00121 <span class="preprocessor">#endif // __SYNC_H__</span>
00122 <span class="preprocessor"></span>
00123
</pre></div><hr><address style="align: right;"><small>Generated on Thu Feb 14 12:42:30 2008 for FastDB by
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