author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 11 May 2010 17:47:24 +0300 | |
branch | RCL_3 |
changeset 25 | 7701629b34a6 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Implementation of CMmapControllerNode |
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* |
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*/ |
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|
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|
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// INCLUDES |
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#include <sys/errno.h> |
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#include <sys/mman.h> |
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#include <liblogger.h> |
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#include "mmapcontrollernode.h" |
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#include "fdesc.h" |
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// ============================ MEMBER FUNCTIONS =============================== |
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// ----------------------------------------------------------------------------- |
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// CMmapControllerNode::CMmapControllerNode |
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// C++ default constructor. |
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// ----------------------------------------------------------------------------- |
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// |
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CMmapControllerNode::CMmapControllerNode() : |
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iMmapQueue(CMmapMemoryNode::LinkOffset()), |
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iMmapQueueIter(iMmapQueue) |
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{ |
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} |
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// ----------------------------------------------------------------------------- |
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// CMmapControllerNode::~CMmapControllerNode |
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// C++ default destructor. |
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// ----------------------------------------------------------------------------- |
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// |
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CMmapControllerNode::~CMmapControllerNode() |
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{ |
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CMmapMemoryNode* lmemnode; |
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iMmapQueueIter.SetToFirst(); |
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while ((lmemnode = iMmapQueueIter++) != NULL) |
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{ |
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iMmapQueue.Remove(*lmemnode); |
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delete lmemnode; |
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}; |
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} |
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// ----------------------------------------------------------------------------- |
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// CMmapControllerNode::NewL |
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// 1st phase constructor. |
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// ----------------------------------------------------------------------------- |
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// |
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CMmapControllerNode * CMmapControllerNode::NewL() |
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{ |
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CMmapControllerNode* self = new (ELeave) CMmapControllerNode(); |
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CleanupStack::PushL(self); |
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self->ConstructL(); |
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CleanupStack::Pop(self); |
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return self; |
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} |
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// ----------------------------------------------------------------------------- |
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// CMmapControllerNode::Construct |
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// 2nd phase constructor. |
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// ----------------------------------------------------------------------------- |
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// |
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void CMmapControllerNode::ConstructL() |
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{ |
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} |
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// ----------------------------------------------------------------------------- |
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// CMmapControllerNode::AddMmapNodeL |
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// Add a mapped memory node into controller list |
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// ----------------------------------------------------------------------------- |
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// |
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TAny* CMmapControllerNode::AddMmapNodeL(struct _reent *r, size_t len, int flag, \ |
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int shmflg, int fildes, off_t offset, size_t maplen) |
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{ |
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CMmapControllerNode *lmemcontroller; |
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|
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/*Check TLS for presence of a node controller if any, if not create one*/ |
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if (!(r->_memaddr)) |
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{ |
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lmemcontroller = CMmapControllerNode::NewL(); |
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r->_memaddr = (void*)lmemcontroller; |
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} |
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else |
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{ |
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lmemcontroller = (CMmapControllerNode*)r->_memaddr; |
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} |
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|
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/* create a new memory mapped node */ |
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CMmapMemoryNode* lmemnode = CMmapMemoryNode::NewL(len, flag, shmflg, \ |
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fildes, offset, r->_errno, maplen); |
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if(((void *)-1) != lmemnode->MappedAddress()) |
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{ |
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107 |
lmemcontroller->iMmapQueue.AddLast(*lmemnode); |
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108 |
//To mark file table entry to indicate mmap exists |
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109 |
CFileDescBase *f = 0; |
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110 |
struct MappedMemory meminfo; |
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111 |
|
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meminfo = lmemnode->GetMemInfo(); |
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f = Backend()->GetDesc(meminfo.fd); |
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114 |
if(f) |
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115 |
{ |
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f->SetAttributes((TUint32)KMMapedFd, (TBool)ETrue); |
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lmemnode->SetFdescAddress((void*)f); |
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118 |
} |
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119 |
else |
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120 |
{ |
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121 |
//Should we respond? |
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122 |
} |
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123 |
} |
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124 |
|
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125 |
return lmemnode->MappedAddress(); |
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126 |
} |
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127 |
|
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128 |
// ----------------------------------------------------------------------------- |
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129 |
// CMmapControllerNode::DeleteMmapNode |
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130 |
// Delete a mapped memory node from controller list |
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131 |
// ----------------------------------------------------------------------------- |
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132 |
// |
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133 |
int CMmapControllerNode::DeleteMmapNode(TAny* aAddr, int& anErrno) |
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134 |
{ |
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135 |
int retval = -1; |
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136 |
|
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137 |
if (!(iMmapQueue.IsEmpty())) |
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138 |
{ |
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139 |
CMmapMemoryNode* lmemnode; |
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140 |
iMmapQueueIter.SetToFirst(); |
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141 |
/* Iterate through to find the matching memory node*/ |
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142 |
while ((lmemnode = iMmapQueueIter++) != NULL) |
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143 |
{ |
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144 |
if(aAddr == lmemnode->MappedAddress()) |
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145 |
{ |
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146 |
//To actually close the fd object if user has already called for a close fd |
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147 |
CFileDescBase *f=0; |
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148 |
struct MappedMemory lmeminfo; |
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149 |
|
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150 |
lmeminfo = lmemnode->GetMemInfo(); |
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151 |
f = (CFileDescBase *)lmeminfo.fdescaddr; |
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152 |
if(f) |
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153 |
{ |
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154 |
TUint32 fileatt = f->Attributes(); |
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155 |
f->SetAttributes((TUint32)KMMapedFd, (TBool)EFalse); |
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156 |
if(fileatt & KInvalidFd) |
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157 |
{ |
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158 |
//We flush the changes back to file, before closing it |
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159 |
if(MAP_SHARED == lmeminfo.flags) |
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160 |
{ |
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161 |
retval = lmemnode->SyncMemory(lmeminfo.maplen, MS_SYNC, anErrno); |
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162 |
} |
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163 |
f->Close(); |
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164 |
} |
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165 |
else |
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166 |
{ |
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167 |
//We flush the changes back to file |
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168 |
if(MAP_SHARED == lmeminfo.flags) |
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169 |
{ |
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170 |
retval = lmemnode->SyncMemory(lmeminfo.maplen, MS_SYNC, anErrno); |
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171 |
} |
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172 |
} |
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173 |
} |
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|
174 |
else |
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|
175 |
{ |
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176 |
//Should we respond? |
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177 |
} |
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178 |
iMmapQueue.Remove(*lmemnode); |
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179 |
delete lmemnode; |
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180 |
retval = 0; |
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181 |
break; |
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182 |
} |
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183 |
} |
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184 |
if(-1 == retval) |
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185 |
{ |
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186 |
anErrno = EINVAL; |
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187 |
} |
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188 |
} |
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189 |
else |
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190 |
{ |
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191 |
anErrno = EINVAL; |
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192 |
} |
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193 |
|
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194 |
return retval; |
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195 |
} |
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196 |
|
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197 |
// ----------------------------------------------------------------------------- |
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198 |
// CMmapControllerNode::SyncMmapNode |
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199 |
// Sync a mapped memory node to its associated resource file |
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200 |
// ----------------------------------------------------------------------------- |
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201 |
// |
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202 |
|
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203 |
int CMmapControllerNode::SyncMmapNode(TAny* aAddr, size_t len, int flags, int& anerror) |
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204 |
{ |
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205 |
int retval = -1; |
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206 |
struct MappedMemory lmeminfo; |
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207 |
bool lnodeexist = FALSE; |
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208 |
|
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209 |
|
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210 |
if (!(iMmapQueue.IsEmpty())) |
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211 |
{ |
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212 |
CMmapMemoryNode* lmemnode; |
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213 |
iMmapQueueIter.SetToFirst(); |
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while ((lmemnode = iMmapQueueIter++) != NULL) |
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215 |
{ |
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if(aAddr == lmemnode->MappedAddress()) |
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217 |
{ |
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//Only if the memory is shared do we want it to be |
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//made visible across processes |
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lnodeexist = TRUE; |
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lmeminfo = lmemnode->GetMemInfo(); |
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if(MAP_SHARED == lmeminfo.flags) |
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223 |
{ |
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if(lmeminfo.maplen >= len) |
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225 |
{ |
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retval = lmemnode->SyncMemory(len, flags, anerror); |
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} |
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else |
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229 |
{ |
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anerror = ENOMEM; |
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231 |
} |
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} |
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233 |
else |
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234 |
{ |
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if((MS_ASYNC == flags) || (MS_SYNC == flags) || \ |
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(MS_INVALIDATE == flags)) |
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237 |
{ |
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/*we just don't respond if memory was mapped to anthing |
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other than MAP_SHARED */ |
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retval = 0; |
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} |
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242 |
else |
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243 |
{ |
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anerror = EINVAL; |
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retval = -1; |
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} |
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247 |
} |
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break; |
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} |
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} |
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/*We are flagging a EINVAL error saying the aAddr could be mapped but not page aligned |
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For all reasons it could be invalid address, but we are looking for page alignment basically*/ |
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if(!lnodeexist) |
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254 |
{ |
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anerror = EINVAL; |
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256 |
} |
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257 |
|
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258 |
} |
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259 |
if(!lnodeexist) |
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260 |
{ |
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anerror = ENOMEM; |
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262 |
} |
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return retval; |
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264 |
} |
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265 |
|
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// ----------------------------------------------------------------------------- |
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// CMmapControllerNode::ChprotMmapNode |
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// Change the protection of a mapped memory. This is currently only build |
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// supported and not functionally supported |
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// ----------------------------------------------------------------------------- |
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// |
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int CMmapControllerNode::ChprotMmapNode(const TAny* aAddr, size_t /*len*/, int /*prot*/, int& anErrno) |
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{ |
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int retval = -1; |
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|
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|
276 |
|
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277 |
if (!(iMmapQueue.IsEmpty())) |
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278 |
{ |
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CMmapMemoryNode* lmemnode; |
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iMmapQueueIter.SetToFirst(); |
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while ((lmemnode = iMmapQueueIter++) != NULL) |
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|
282 |
{ |
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283 |
if(aAddr == lmemnode->MappedAddress()) |
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|
284 |
{ |
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285 |
/*Currently we do not support protection modification*/ |
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286 |
anErrno = ENOSYS; |
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287 |
break; |
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|
288 |
} |
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|
289 |
} |
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290 |
if(-1 == retval) |
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|
291 |
{ |
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292 |
anErrno = EINVAL; |
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293 |
} |
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|
294 |
} |
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|
295 |
else |
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|
296 |
{ |
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297 |
anErrno = EINVAL; |
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298 |
} |
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|
299 |
|
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300 |
return retval; |
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|
301 |
} |
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|
302 |
// End of File |