1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> 2<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"> 3<title>oscl_file_async_read.h Source File</title> 4<link href="doxygen.css" rel="stylesheet" type="text/css"> 5</head><body> 6<!-- Generated by Doxygen 1.2.18 --> 7<center> 8<a class="qindex" href="index.html">Main Page</a> <a class="qindex" href="modules.html">Modules</a> <a class="qindex" href="hierarchy.html">Class Hierarchy</a> <a class="qindex" href="annotated.html">Data Structures</a> <a class="qindex" href="files.html">File List</a> <a class="qindex" href="functions.html">Data Fields</a> <a class="qindex" href="globals.html">Globals</a> </center> 9<hr><h1>oscl_file_async_read.h</h1><a href="oscl__file__async__read_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <span class="comment">/*</span> 1000002 <span class="comment">* ============================================================================</span> 1100003 <span class="comment">* Name : oscl_async_file.h</span> 1200004 <span class="comment">* Part of : osclio</span> 1300005 <span class="comment">* Interface :</span> 1400006 <span class="comment">* Description :</span> 1500007 <span class="comment">* Version :</span> 1600008 <span class="comment">* ==============================================================================</span> 1700009 <span class="comment">*/</span> 1800010 1900011 <span class="preprocessor">#ifndef OSCL_FILE_ASYNC_READ_H_INCLUDED</span> 2000012 <span class="preprocessor"></span><span class="preprocessor">#define OSCL_FILE_ASYNC_READ_H_INCLUDED</span> 2100013 <span class="preprocessor"></span> 2200014 2300015 <span class="preprocessor">#include "<a class="code" href="oscl__base_8h.html">oscl_base.h</a>"</span> 2400016 <span class="preprocessor">#include "<a class="code" href="osclconfig__io_8h.html">osclconfig_io.h</a>"</span> 2500017 <span class="preprocessor">#include "<a class="code" href="oscl__vector_8h.html">oscl_vector.h</a>"</span> 2600018 <span class="preprocessor">#include "<a class="code" href="oscl__mem_8h.html">oscl_mem.h</a>"</span> 2700019 <span class="preprocessor">#include "<a class="code" href="oscl__scheduler__ao_8h.html">oscl_scheduler_ao.h</a>"</span> 2800020 <span class="preprocessor">#include "<a class="code" href="oscl__file__io_8h.html">oscl_file_io.h</a>"</span> 2900021 3000022 <span class="preprocessor">#ifndef OSCL_SEMAPHORE_H_INCLUDED</span> 3100023 <span class="preprocessor"></span><span class="preprocessor">#include "<a class="code" href="oscl__semaphore_8h.html">oscl_semaphore.h</a>"</span> 3200024 <span class="preprocessor">#endif</span> 3300025 <span class="preprocessor"></span> 3400026 <span class="keyword">class </span><a class="code" href="classOsclNativeFile.html">OsclNativeFile</a>; 3500027 3600028 <span class="comment">//non-modifiable buffer pointer container</span> 37<a name="l00029"></a><a class="code" href="classOsclPtrC.html">00029</a> <span class="keyword">class </span><a class="code" href="classOsclPtrC.html">OsclPtrC</a>: <span class="keyword">public</span> <a class="code" href="classHeapBase.html">HeapBase</a> 3800030 { 3900031 <span class="keyword">public</span>: 40<a name="l00032"></a><a class="code" href="classOsclPtrC.html#a0">00032</a> <a class="code" href="classOsclPtrC.html#a0">OsclPtrC</a>(<span class="keyword">const</span> uint8* ptr, int32 len, int32 max): iPtr(ptr), iMaxLength(max), iLength(len) 4100033 {} 42<a name="l00034"></a><a class="code" href="classOsclPtrC.html#a1">00034</a> <a class="code" href="classOsclPtrC.html#a0">OsclPtrC</a>(<span class="keyword">const</span> <a class="code" href="classOsclPtrC.html">OsclPtrC</a>& d): <a class="code" href="classHeapBase.html">HeapBase</a>(d), iPtr(d.iPtr), iMaxLength(d.iMaxLength), iLength(d.iLength) 4300035 {} 44<a name="l00036"></a><a class="code" href="classOsclPtrC.html#a2">00036</a> <span class="keyword">const</span> uint8* <a class="code" href="classOsclPtrC.html#a2">Ptr</a>() 4500037 { 4600038 <span class="keywordflow">return</span> iPtr; 4700039 } 48<a name="l00040"></a><a class="code" href="classOsclPtrC.html#a3">00040</a> <span class="keywordtype">void</span> <a class="code" href="classOsclPtrC.html#a3">SetLength</a>(int32 l) 4900041 { 5000042 <a class="code" href="group__osclbase.html#a78">OSCL_ASSERT</a>(l <= iMaxLength); 5100043 iLength = l; 5200044 } 53<a name="l00045"></a><a class="code" href="classOsclPtrC.html#a4">00045</a> int32 <a class="code" href="classOsclPtrC.html#a4">Length</a>() 5400046 { 5500047 <span class="keywordflow">return</span> iLength; 5600048 } 57<a name="l00049"></a><a class="code" href="classOsclPtrC.html#a5">00049</a> <span class="keywordtype">void</span> <a class="code" href="classOsclPtrC.html#a5">Zero</a>() 5800050 { 5900051 iLength = 0; 6000052 } 61<a name="l00053"></a><a class="code" href="classOsclPtrC.html#a6">00053</a> <span class="keywordtype">void</span> <a class="code" href="classOsclPtrC.html#a6">Set</a>(<a class="code" href="classOsclPtrC.html">OsclPtrC</a>* v) 6200054 { 6300055 iPtr = v-><a class="code" href="classOsclPtrC.html#o0">iPtr</a>; 6400056 iMaxLength = v-><a class="code" href="classOsclPtrC.html#o1">iMaxLength</a>; 6500057 iLength = v-><a class="code" href="classOsclPtrC.html#o2">iLength</a>; 6600058 } 67<a name="l00059"></a><a class="code" href="classOsclPtrC.html#a7">00059</a> <span class="keywordtype">void</span> <a class="code" href="classOsclPtrC.html#a6">Set</a>(uint8* ptr, int32 len, int32 max) 6800060 { 6900061 iPtr = ptr; 7000062 iLength = len; 7100063 iMaxLength = max; 7200064 } 7300065 <span class="comment">//extract the right-most data</span> 74<a name="l00066"></a><a class="code" href="classOsclPtrC.html#a8">00066</a> <a class="code" href="classOsclPtrC.html">OsclPtrC</a> <a class="code" href="classOsclPtrC.html#a8">Right</a>(int32 size) 7500067 { 7600068 <a class="code" href="group__osclbase.html#a78">OSCL_ASSERT</a>(iLength >= size); 7700069 <a class="code" href="classOsclPtrC.html">OsclPtrC</a> des(iPtr + iLength - size, size, size); 7800070 <span class="keywordflow">return</span> des; 7900071 } 8000072 <span class="comment">//extract the left-most data</span> 81<a name="l00073"></a><a class="code" href="classOsclPtrC.html#a9">00073</a> <a class="code" href="classOsclPtrC.html">OsclPtrC</a> <a class="code" href="classOsclPtrC.html#a9">Left</a>(int32 size) 8200074 { 8300075 <a class="code" href="group__osclbase.html#a78">OSCL_ASSERT</a>(iLength >= size); 8400076 <a class="code" href="classOsclPtrC.html">OsclPtrC</a> des(iPtr, size, size); 8500077 <span class="keywordflow">return</span> des; 8600078 } 8700079 <span class="keyword">private</span>: 8800080 <span class="keyword">const</span> uint8* iPtr; 8900081 int32 iMaxLength; 9000082 int32 iLength; 9100083 }; 9200084 9300085 <span class="comment">//modifiable buffer pointer container</span> 94<a name="l00086"></a><a class="code" href="classOsclPtr.html">00086</a> <span class="keyword">class </span><a class="code" href="classOsclPtr.html">OsclPtr</a>: <span class="keyword">public</span> <a class="code" href="classHeapBase.html">HeapBase</a> 9500087 { 9600088 <span class="keyword">public</span>: 97<a name="l00089"></a><a class="code" href="classOsclPtr.html#a0">00089</a> <a class="code" href="classOsclPtr.html#a0">OsclPtr</a>(uint8* ptr, int32& len, int32 max): iPtr(ptr), iMaxLength(max), iLength(len) 9800090 {} 99<a name="l00091"></a><a class="code" href="classOsclPtr.html#a1">00091</a> <a class="code" href="classOsclPtr.html#a0">OsclPtr</a>(<span class="keyword">const</span> <a class="code" href="classOsclPtr.html">OsclPtr</a>& d): <a class="code" href="classHeapBase.html">HeapBase</a>(d), iPtr(d.iPtr), iMaxLength(d.iMaxLength), iLength(d.iLength) 10000092 {} 101<a name="l00093"></a><a class="code" href="classOsclPtr.html#a2">00093</a> uint8* <a class="code" href="classOsclPtr.html#a2">Ptr</a>() 10200094 { 10300095 <span class="keywordflow">return</span> iPtr; 10400096 } 105<a name="l00097"></a><a class="code" href="classOsclPtr.html#a3">00097</a> <span class="keywordtype">void</span> <a class="code" href="classOsclPtr.html#a3">SetLength</a>(int32 l) 10600098 { 10700099 <a class="code" href="group__osclbase.html#a78">OSCL_ASSERT</a>(l <= iMaxLength); 10800100 iLength = l; 10900101 } 110<a name="l00102"></a><a class="code" href="classOsclPtr.html#a4">00102</a> int32 <a class="code" href="classOsclPtr.html#a4">Length</a>() 11100103 { 11200104 <span class="keywordflow">return</span> iLength; 11300105 } 114<a name="l00106"></a><a class="code" href="classOsclPtr.html#a5">00106</a> <span class="keywordtype">void</span> <a class="code" href="classOsclPtr.html#a5">Zero</a>() 11500107 { 11600108 iLength = 0; 11700109 } 118<a name="l00110"></a><a class="code" href="classOsclPtr.html#a6">00110</a> <span class="keywordtype">void</span> <a class="code" href="classOsclPtr.html#a6">Set</a>(<a class="code" href="classOsclPtr.html">OsclPtr</a> &v) 11900111 { 12000112 iPtr = v.<a class="code" href="classOsclPtr.html#o0">iPtr</a>; 12100113 iMaxLength = v.<a class="code" href="classOsclPtr.html#o1">iMaxLength</a>; 12200114 iLength = v.<a class="code" href="classOsclPtr.html#o2">iLength</a>; 12300115 } 124<a name="l00116"></a><a class="code" href="classOsclPtr.html#a7">00116</a> <span class="keywordtype">void</span> <a class="code" href="classOsclPtr.html#a6">Set</a>(uint8* ptr, int32 len, int32 max) 12500117 { 12600118 iPtr = ptr; 12700119 iLength = len; 12800120 iMaxLength = max; 12900121 } 130<a name="l00122"></a><a class="code" href="classOsclPtr.html#a8">00122</a> <span class="keywordtype">void</span> <a class="code" href="classOsclPtr.html#a8">Append</a>(<a class="code" href="classOsclPtrC.html">OsclPtrC</a> &v) 13100123 { 13200124 <a class="code" href="group__osclbase.html#a78">OSCL_ASSERT</a>(iLength + v.<a class="code" href="classOsclPtrC.html#a4">Length</a>() <= iMaxLength); 13300125 <a class="code" href="group__osclmemory.html#a12">oscl_memmove</a>(iPtr + iLength, v.<a class="code" href="classOsclPtrC.html#a2">Ptr</a>(), v.<a class="code" href="classOsclPtrC.html#a4">Length</a>()); 13400126 iLength += v.<a class="code" href="classOsclPtrC.html#a4">Length</a>(); 13500127 } 13600128 <span class="keyword">private</span>: 13700129 uint8* iPtr; 13800130 int32 iMaxLength; 13900131 int32& iLength; 14000132 }; 14100133 14200134 <span class="comment">//buffer container that allocates from the heap</span> 143<a name="l00135"></a><a class="code" href="classOsclBuf.html">00135</a> <span class="keyword">class </span><a class="code" href="classOsclBuf.html">OsclBuf</a>: <span class="keyword">public</span> <a class="code" href="classHeapBase.html">HeapBase</a> 14400136 { 14500137 <span class="keyword">public</span>: 146<a name="l00138"></a><a class="code" href="classOsclBuf.html#d0">00138</a> <span class="keyword">static</span> <a class="code" href="classOsclBuf.html">OsclBuf</a>* <a class="code" href="classOsclBuf.html#d0">NewL</a>(int32 size) 14700139 { 14800140 <a class="code" href="classOsclBuf.html">OsclBuf</a>* self = <a class="code" href="group__osclmemory.html#a52">OSCL_NEW</a>(<a class="code" href="classOsclBuf.html">OsclBuf</a>, (size)); 14900141 self-><a class="code" href="classOsclBuf.html#m0">iBuffer</a> = (uint8*)<a class="code" href="group__osclmemory.html#a39">OSCL_MALLOC</a>(self-><a class="code" href="classOsclBuf.html#m1">iMaxLength</a>); 15000142 <span class="keywordflow">if</span> (!self-><a class="code" href="classOsclBuf.html#m0">iBuffer</a>) 15100143 { 15200144 <a class="code" href="group__osclmemory.html#a57">OSCL_DELETE</a>(self); 15300145 <a class="code" href="classOsclError.html#d7">OsclError::Leave</a>(<a class="code" href="group__osclerror.html#a13">OsclErrNoMemory</a>); 15400146 } 15500147 <span class="keywordflow">return</span> self; 15600148 } 15700149 158<a name="l00150"></a><a class="code" href="classOsclBuf.html#d1">00150</a> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classOsclBuf.html#d1">Delete</a>(<a class="code" href="classOsclBuf.html">OsclBuf</a>* a) 15900151 { 16000152 <span class="keywordflow">if</span> (a) 16100153 { 16200154 <span class="keywordflow">if</span> (a-><a class="code" href="classOsclBuf.html#m0">iBuffer</a>) 16300155 <a class="code" href="group__osclmemory.html#a49">OSCL_FREE</a>(a-><a class="code" href="classOsclBuf.html#m0">iBuffer</a>); 16400156 <a class="code" href="group__osclmemory.html#a57">OSCL_DELETE</a>(a); 16500157 } 16600158 } 16700159 168<a name="l00160"></a><a class="code" href="classOsclBuf.html#a0">00160</a> <a class="code" href="classOsclBuf.html#a0">OsclBuf</a>(int32 size): <a class="code" href="classOsclBuf.html#m0">iBuffer</a>(<a class="code" href="group__osclbase.html#a81">NULL</a>), <a class="code" href="classOsclBuf.html#m1">iMaxLength</a>(size), <a class="code" href="classOsclBuf.html#m2">iLength</a>(0) 16900161 {} 17000162 171<a name="l00163"></a><a class="code" href="classOsclBuf.html#a1">00163</a> int32 <a class="code" href="classOsclBuf.html#a1">Length</a>() 17200164 { 17300165 <span class="keywordflow">return</span> <a class="code" href="classOsclBuf.html#m2">iLength</a>; 17400166 } 17500167 176<a name="l00168"></a><a class="code" href="classOsclBuf.html#a2">00168</a> <a class="code" href="classOsclPtr.html">OsclPtr</a> <a class="code" href="classOsclBuf.html#a2">Des</a>() 17700169 { 17800170 <a class="code" href="classOsclPtr.html">OsclPtr</a> des(<a class="code" href="classOsclBuf.html#m0">iBuffer</a>, <a class="code" href="classOsclBuf.html#m2">iLength</a>, <a class="code" href="classOsclBuf.html#m1">iMaxLength</a>); 17900171 <span class="keywordflow">return</span> des; 18000172 } 181<a name="l00173"></a><a class="code" href="classOsclBuf.html#a3">00173</a> <a class="code" href="classOsclPtrC.html">OsclPtrC</a> <a class="code" href="classOsclBuf.html#a3">DesC</a>() 18200174 { 18300175 <a class="code" href="classOsclPtrC.html">OsclPtrC</a> des(<a class="code" href="classOsclBuf.html#m0">iBuffer</a>, <a class="code" href="classOsclBuf.html#m2">iLength</a>, <a class="code" href="classOsclBuf.html#m1">iMaxLength</a>); 18400176 <span class="keywordflow">return</span> des; 18500177 } 18600178 187<a name="l00179"></a><a class="code" href="classOsclBuf.html#m0">00179</a> uint8* <a class="code" href="classOsclBuf.html#m0">iBuffer</a>; 188<a name="l00180"></a><a class="code" href="classOsclBuf.html#m1">00180</a> int32 <a class="code" href="classOsclBuf.html#m1">iMaxLength</a>; 189<a name="l00181"></a><a class="code" href="classOsclBuf.html#m2">00181</a> int32 <a class="code" href="classOsclBuf.html#m2">iLength</a>; 19000182 }; 19100183 19200184 193<a name="l00190"></a><a class="code" href="classOsclAsyncFileBuffer.html">00190</a> <span class="keyword">class </span><a class="code" href="classOsclAsyncFileBuffer.html">OsclAsyncFileBuffer</a>: <span class="keyword">public</span> <a class="code" href="classHeapBase.html">HeapBase</a> 19400191 { 19500192 <span class="keyword">public</span>: 19600193 <span class="keyword">static</span> <a class="code" href="classOsclAsyncFileBuffer.html">OsclAsyncFileBuffer</a>* <a class="code" href="classOsclAsyncFileBuffer.html#d0">NewL</a>(int32 aBufferSize, int32 aId); 19700194 <a class="code" href="classOsclAsyncFileBuffer.html#a0">~OsclAsyncFileBuffer</a>(); 19800195 19900196 <span class="keyword">public</span>: 200<a name="l00197"></a><a class="code" href="classOsclAsyncFileBuffer.html#a1">00197</a> <span class="keywordtype">void</span> <a class="code" href="classOsclAsyncFileBuffer.html#a1">CleanInUse</a>() 20100198 { 20200199 iInUse = <span class="keyword">false</span>; 20300200 } 204<a name="l00201"></a><a class="code" href="classOsclAsyncFileBuffer.html#a2">00201</a> <span class="keywordtype">void</span> <a class="code" href="classOsclAsyncFileBuffer.html#a2">SetInUse</a>() 20500202 { 20600203 iInUse = <span class="keyword">true</span>; 20700204 } 208<a name="l00205"></a><a class="code" href="classOsclAsyncFileBuffer.html#a3">00205</a> <span class="keywordtype">bool</span> <a class="code" href="classOsclAsyncFileBuffer.html#a3">IsInUse</a>() 20900206 { 21000207 <span class="keywordflow">return</span> iInUse; 21100208 } 212<a name="l00209"></a><a class="code" href="classOsclAsyncFileBuffer.html#a4">00209</a> <span class="keywordtype">bool</span> <a class="code" href="classOsclAsyncFileBuffer.html#a4">IsValid</a>() 21300210 { 21400211 <span class="keywordflow">return</span> iValid; 21500212 } 216<a name="l00213"></a><a class="code" href="classOsclAsyncFileBuffer.html#a5">00213</a> <a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> <a class="code" href="classOsclAsyncFileBuffer.html#a5">Offset</a>() 21700214 { 21800215 <span class="keywordflow">return</span> iOffset; 21900216 } 220<a name="l00217"></a><a class="code" href="classOsclAsyncFileBuffer.html#a6">00217</a> <span class="keywordtype">void</span> <a class="code" href="classOsclAsyncFileBuffer.html#a6">SetOffset</a>(<a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> aOffset) 22100218 { 22200219 iOffset = aOffset; 22300220 } 224<a name="l00221"></a><a class="code" href="classOsclAsyncFileBuffer.html#a7">00221</a> int32 <a class="code" href="classOsclAsyncFileBuffer.html#a7">Length</a>() 22500222 { 22600223 <span class="keywordflow">return</span> iLength; 22700224 } 22800225 <span class="keywordtype">bool</span> <a class="code" href="classOsclAsyncFileBuffer.html#a8">HasThisOffset</a>(<a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> aOffset); 229<a name="l00226"></a><a class="code" href="classOsclAsyncFileBuffer.html#a9">00226</a> int32 <a class="code" href="classOsclAsyncFileBuffer.html#a9">Id</a>() 23000227 { 23100228 <span class="keywordflow">return</span> iId; 23200229 } 23300230 <a class="code" href="classOsclBuf.html">OsclBuf</a>* <a class="code" href="classOsclAsyncFileBuffer.html#a10">Buffer</a>(); 23400231 <span class="keywordtype">void</span> <a class="code" href="classOsclAsyncFileBuffer.html#a11">UpdateData</a>(); 23500232 <span class="keywordtype">void</span> <a class="code" href="classOsclAsyncFileBuffer.html#a12">StartAsyncRead</a>(<span class="keywordtype">bool</span> aStartAsyncRead); 23600233 23700234 <span class="keyword">private</span>: 23800235 <a class="code" href="classOsclAsyncFileBuffer.html">OsclAsyncFileBuffer</a>(int32 aBufferSize, int32 aId); 23900236 <span class="keywordtype">void</span> ConstructL(); 24000237 24100238 <span class="keyword">private</span>: 24200239 <a class="code" href="classOsclBuf.html">OsclBuf</a>* iBuffer; 24300240 <a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> iOffset; 24400241 <span class="keywordtype">bool</span> iInUse; 24500242 int32 iLength; 24600243 <span class="keywordtype">bool</span> iValid; 24700244 int32 iBufferSize; 24800245 int32 iId; 24900246 }; 25000247 25100248 252<a name="l00252"></a><a class="code" href="classOsclAsyncFile.html">00252</a> <span class="keyword">class </span><a class="code" href="classOsclAsyncFile.html">OsclAsyncFile</a> : <span class="keyword">public</span> <a class="code" href="classOsclActiveObject.html">OsclActiveObject</a> 25300253 { 25400254 <span class="keyword">public</span>: 25500272 <span class="keyword">static</span> <a class="code" href="classOsclAsyncFile.html">OsclAsyncFile</a>* <a class="code" href="classOsclAsyncFile.html#d0">NewL</a>(<a class="code" href="classOsclNativeFile.html">OsclNativeFile</a>& aAsyncFile, int32 aCacheSize, <a class="code" href="classPVLogger.html">PVLogger</a>*); 25600273 <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classOsclAsyncFile.html#d1">Delete</a>(<a class="code" href="classOsclAsyncFile.html">OsclAsyncFile</a>*); 25700274 25800278 <a class="code" href="classOsclAsyncFile.html#a0">~OsclAsyncFile</a>(); 25900279 26000280 <span class="keyword">private</span>: 26100281 <span class="comment">//From OsclActiveObject</span> 26200282 <span class="keywordtype">void</span> <a class="code" href="classPVActiveBase.html#a4">Run</a>(); 26300283 <span class="keywordtype">void</span> <a class="code" href="classOsclActiveObject.html#b0">DoCancel</a>(); 26400284 26500285 <span class="keyword">public</span>: 26600287 <span class="comment">// File IO methods.</span> 26700289 <span class="comment"></span> 26800290 int32 <a class="code" href="classOsclAsyncFile.html#a1">Open</a>(<span class="keyword">const</span> <a class="code" href="group__osclbase.html#a32">oscl_wchar</a> *filename, uint32 mode 26900291 , <span class="keyword">const</span> <a class="code" href="classOsclNativeFileParams.html">OsclNativeFileParams</a>& params 27000292 , <a class="code" href="classOscl__FileServer.html">Oscl_FileServer</a>& fileserv); 27100293 int32 <a class="code" href="classOsclAsyncFile.html#a1">Open</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *filename, uint32 mode 27200294 , <span class="keyword">const</span> <a class="code" href="classOsclNativeFileParams.html">OsclNativeFileParams</a>& params 27300295 , <a class="code" href="classOscl__FileServer.html">Oscl_FileServer</a>& fileserv); 27400296 27500297 int32 <a class="code" href="classOsclAsyncFile.html#a3">Seek</a>(<a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> offset, <a class="code" href="classOscl__File.html#s11">Oscl_File::seek_type</a> origin); 27600298 <a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> <a class="code" href="classOsclAsyncFile.html#a4">Tell</a>(); 27700299 uint32 <a class="code" href="classOsclAsyncFile.html#a5">Read</a>(<a class="code" href="group__osclbase.html#a25">OsclAny</a>* aBuffer1, uint32 aDataSize, uint32 aNumElements); 27800300 int32 <a class="code" href="classOsclAsyncFile.html#a6">EndOfFile</a>(); 27900301 <a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> <a class="code" href="classOsclAsyncFile.html#a7">Size</a>(); 28000302 int32 <a class="code" href="classOsclAsyncFile.html#a8">Close</a>(); 28100303 282<a name="l00304"></a><a class="code" href="classOsclAsyncFile.html#a9">00304</a> uint32 <a class="code" href="classOsclAsyncFile.html#a9">Write</a>(<span class="keyword">const</span> <a class="code" href="group__osclbase.html#a25">OsclAny</a>* aBuffer1, uint32 aDataSize, uint32 aNumElements) 28300305 { 28400306 <a class="code" href="group__osclbase.html#a89">OSCL_UNUSED_ARG</a>(aBuffer1); 28500307 <a class="code" href="group__osclbase.html#a89">OSCL_UNUSED_ARG</a>(aDataSize); 28600308 <a class="code" href="group__osclbase.html#a89">OSCL_UNUSED_ARG</a>(aNumElements); 28700309 <span class="keywordflow">return</span> 0;<span class="comment">//not supported</span> 28800310 } 289<a name="l00311"></a><a class="code" href="classOsclAsyncFile.html#a10">00311</a> uint32 <a class="code" href="classOsclAsyncFile.html#a10">Flush</a>() 29000312 { 29100313 <span class="keywordflow">return</span> ((uint32) - 1);<span class="comment">//not supported</span> 29200314 } 29300315 29400316 <span class="keyword">private</span>: 29500317 <a class="code" href="classOsclAsyncFile.html">OsclAsyncFile</a>(<a class="code" href="classOsclNativeFile.html">OsclNativeFile</a>& aAsyncFile, int32 aCacheSize, <a class="code" href="classPVLogger.html">PVLogger</a>*); 29600321 <span class="keywordtype">void</span> ConstructL(); 29700322 29800323 <span class="keyword">private</span>: 29900324 <span class="comment">// private utility methods</span> 30000325 <span class="keywordtype">void</span> StartAsyncRead(<span class="keywordtype">bool</span> aStartAsyncRead); 30100326 <span class="keywordtype">bool</span> FindDataBuffer(<a class="code" href="classOsclAsyncFileBuffer.html">OsclAsyncFileBuffer</a>*& aDataBuffer, int32& aBufferId, <a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> aOffset, int32 aSize); 30200327 <span class="keywordtype">void</span> UpdateReading(); 30300328 int32 BytesReadAhead(); 30400329 int32 SortDataBuffers(); 30500330 <span class="keywordtype">bool</span> GetNextDataBuffer(<a class="code" href="classOsclAsyncFileBuffer.html">OsclAsyncFileBuffer</a>*& aDataBuffer, <a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> aFilePointerToReadFrom); 30600331 <span class="keywordtype">void</span> StartNextRead(<a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> aPosToReadFrom); 30700332 <span class="keywordtype">void</span> ReOrderBuffersQueue(int32 aFirstBufferId); 30800333 <span class="keywordtype">bool</span> IsLinkedDataBuffer(<a class="code" href="classOsclAsyncFileBuffer.html">OsclAsyncFileBuffer</a>* aDataBuffer); 30900334 <span class="keywordtype">bool</span> CanBeLinked(<a class="code" href="classOsclAsyncFileBuffer.html">OsclAsyncFileBuffer</a>* aDataBuffer); 31000335 uint32 doRead(uint8*& aBuffer1, uint32 aDataSize, uint32 aNumElements, <a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> aOffset); 31100336 31200337 <span class="keyword">private</span>: 31300338 <a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> iFileSize; 31400339 31500340 <span class="comment">// File object to do async read from</span> 31600341 <a class="code" href="classOsclNativeFile.html">OsclNativeFile</a>& iNativeFile; 31700342 31800343 <span class="comment">// File position for async reads.</span> 31900344 <a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> iAsyncFilePosition; 32000345 32100346 <span class="comment">// For verification</span> 32200347 <a class="code" href="classOsclNativeFile.html">OsclNativeFile</a>* iNativeFileVerify; 32300348 int32 iVerifyCount; 32400349 32500350 <span class="comment">// Duplicate file handle for sync read</span> 32600351 <a class="code" href="classOsclNativeFile.html">OsclNativeFile</a>* iNativeFileDuplicate; 32700352 32800353 <span class="comment">// File position for sync reads.</span> 32900354 <a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> iSyncFilePosition; 33000355 33100356 <span class="comment">// Arrays of data buffers</span> 33200357 <a class="code" href="classOscl__Vector.html">Oscl_Vector<OsclAsyncFileBuffer*, OsclMemAllocator></a> iDataBufferArray; 33300358 <a class="code" href="classOscl__Vector.html">Oscl_Vector<OsclAsyncFileBuffer*, OsclMemAllocator></a> iSortedDataBufferArray; 33400359 <a class="code" href="classOscl__Vector.html">Oscl_Vector<OsclAsyncFileBuffer*, OsclMemAllocator></a> iLinkedDataBufferArray; 33500360 33600361 <span class="comment">// Local data buffer</span> 33700362 <a class="code" href="classOsclAsyncFileBuffer.html">OsclAsyncFileBuffer</a>* iDataBuffer; 33800363 <a class="code" href="classOsclAsyncFileBuffer.html">OsclAsyncFileBuffer</a>* iDataBufferInUse; 33900364 34000365 <span class="comment">// Buffer for synchronous read</span> 34100366 <a class="code" href="classOsclBuf.html">OsclBuf</a>* iSyncBuffer; 34200367 34300368 <span class="comment">// Initialized in constructor. Determines the size of each data buffer</span> 34400369 uint32 iTotalCacheSize; 34500370 34600371 <span class="comment">// Logical File Position (as seen by the client of this class)</span> 34700372 <a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> iFilePosition; 34800373 34900374 <span class="comment">// Last offset after a user read operation</span> 35000375 <a class="code" href="osclconfig__io_8h.html#a48">TOsclFileOffset</a> iLastUserFileRead; 35100376 35200377 <span class="comment">// Start async read enable flag</span> 35300378 <span class="keywordtype">bool</span> iStartAsyncRead; 35400379 35500380 <span class="comment">// Pointer to buffer for asynchronous read</span> 35600381 int32 iReadPtrDummyLen; 35700382 <a class="code" href="classOsclPtr.html">OsclPtr</a> iReadPtr; 35800383 35900384 <span class="comment">// For profiling</span> 36000385 <a class="code" href="classPVLogger.html">PVLogger</a>* iLogger; 36100386 36200388 <span class="comment">// Configuration parameters.</span> 36300390 <span class="comment"></span> 36400391 <span class="comment">// Number of buffers in the linked list</span> 36500392 int32 iKCacheBufferCount ; 36600393 36700394 <span class="comment">// This defines the limit on how much data we will</span> 36800395 <span class="comment">// read ahead of the current position</span> 36900396 int32 iKMinBytesReadAhead ; 37000397 37100398 <span class="comment">// This defines the size of the individual async read operations.</span> 37200399 int32 iKAsyncReadBufferSize ; 37300400 37400402 <span class="comment">// The non-native async read implementation.</span> 37500404 <span class="comment"></span> 37600405 <span class="comment">// Keeps track of whether we have native async read or not</span> 37700406 <span class="keywordtype">bool</span> iHasNativeAsyncRead; 37800407 37900408 <span class="comment">// Thread control sems</span> 38000409 <a class="code" href="classOsclSemaphore.html">OsclSemaphore</a> iAsyncReadSem; 38100410 <a class="code" href="classOsclSemaphore.html">OsclSemaphore</a> iAsyncReadExitSem; 38200411 38300412 <span class="comment">// To keep track of the tread state:</span> 38400413 <span class="comment">// EAsyncReadNotActive - the thread is not created or the thread is stopped</span> 38500414 <span class="comment">// EAsyncReadActive - the thread is running</span> 38600415 <span class="keyword">enum</span> TAsyncReadThreadState {EAsyncReadNotActive, EAsyncReadActive}; 38700416 TAsyncReadThreadState iAsyncReadThreadState; 38800417 38900418 <span class="comment">// To signal the thread to exit</span> 39000419 <span class="keywordtype">bool</span> iAsyncReadThreadExitFlag; 39100420 39200421 <span class="comment">// Number of bytes read in the last call</span> 39300422 int32 iAsyncReadNumBytes; 39400423 39500424 <span class="comment">// Thread routine</span> 39600425 <span class="keywordtype">void</span> InThread(); 39700426 <span class="keyword">static</span> TOsclThreadFuncRet OSCL_THREAD_DECL iAsyncReadThreadFunc(TOsclThreadFuncArg); 39800427 39900428 <span class="comment">// Thread start/stop.</span> 40000429 <span class="keywordtype">void</span> LaunchAsyncReadThread(); 40100430 <span class="keywordtype">void</span> StopAsyncReadThread(); 40200431 40300432 <span class="comment">// Request an async read.</span> 40400433 <span class="keywordtype">void</span> StartNonNativeAsyncRead(); 40500434 40600435 <span class="keyword">public</span>: 40700436 <span class="comment">// for test&stat</span> 408<a name="l00437"></a><a class="code" href="classOsclAsyncFile.html#m0">00437</a> uint32 <a class="code" href="classOsclAsyncFile.html#m0">iNumOfRun</a>; 409<a name="l00438"></a><a class="code" href="classOsclAsyncFile.html#m1">00438</a> uint32 <a class="code" href="classOsclAsyncFile.html#m1">iNumOfRunErr</a>; 41000439 }; 41100440 41200441 <span class="preprocessor">#endif</span> 41300442 <span class="preprocessor"></span> 414</pre></div><hr size="1"><img src="pvlogo_small.jpg"><address style="align: right;"><small>OSCL API</small> 415<address style="align: left;"><small>Posting Version: OPENCORE_20090310 </small> 416</small></address> 417</body> 418</html> 419
