javauis/mmapi_akn/baseline/src/cmmaoutputstream.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 27 Apr 2010 16:30:29 +0300
branchRCL_3
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permissions -rw-r--r--
Revision: v2.1.22 Kit: 201017
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/*
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* Copyright (c) 2002-2007 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:  Class to handle OutputStream operations.
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*
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*/
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#include <jdebug.h>
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#include <JniEnvWrapper.h>
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#include "cmmaoutputstream.h"
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#include "mmmaeventposter.h"
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#include "cmmaoutputstreamevent.h"
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// CONSTANTS
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const TInt KMMACommit = -10000; // indicates native started commit
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CMMAOutputStream* CMMAOutputStream::NewL(JNIEnv* aJNIEnv,
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        MMMAEventPoster* aEventPoster,
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        jobject aJavaOutputStreamWriter
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                                        )
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{
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    CMMAOutputStream* self = CMMAOutputStream::NewLC(aJNIEnv,
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                             aEventPoster,
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                             aJavaOutputStreamWriter
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                                                    );
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    CleanupStack::Pop();
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    return self;
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}
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CMMAOutputStream* CMMAOutputStream::NewLC(JNIEnv* aJNIEnv,
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        MMMAEventPoster* aEventPoster,
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        jobject aJavaOutputStreamWriter
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                                         )
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{
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    CMMAOutputStream* self = new(ELeave) CMMAOutputStream(aEventPoster);
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    CleanupStack::PushL(self);
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    self->ConstructL(aJNIEnv, aJavaOutputStreamWriter);
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    return self;
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}
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void CMMAOutputStream::CreateL(CMMAOutputStream** aOutputStream,
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                               JNIEnv* aJniEnv,
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                               MMMAEventPoster* aEventPoster,
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                               jobject aJavaOutputStreamWriter)
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{
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    // JNI interface pointer can't be passed to different thread, so
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    // it is needed to get valid JNI interface pointer for Event Server thread
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    aJniEnv = JniEnvWrapper::GetValidJniRef();
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    *aOutputStream = NewL(aJniEnv, aEventPoster, aJavaOutputStreamWriter);
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}
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CMMAOutputStream::~CMMAOutputStream()
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{
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    DEBUG("MMA::CMMAOutputStream::~");
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    // If write event is in the event server, it cannot be deleted.
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    // Thus set the event to be deleted when event dispatch is called.
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    if (iWriteEvent &&
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            iWriteEvent->State() == CMMAOutputStreamEvent::EMMAEventActive)
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    {
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        iWriteEvent->SetState(CMMAOutputStreamEvent::EMMADeleteEvent);
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    }
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    else
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    {
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        delete iWriteEvent;
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    }
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    delete iData;
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    DEBUG("MMA::CMMAOutputStream::~ OK");
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}
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// Default constructor
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CMMAOutputStream::CMMAOutputStream(MMMAEventPoster* aEventPoster)
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        : iEventSource(aEventPoster),
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        iPtr(NULL, 0)
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{
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    DEBUG("MMA::CMMAOutputStream constructed");
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}
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void CMMAOutputStream::ConstructL(JNIEnv* aJNIEnv,
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                                  jobject aJavaOutputStreamWriter)
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{
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    DEBUG("CMMAOutputStream::ConstructL()");
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    // void write( int aLength, int aStatus ) method in OutputStreamWriter
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    jmethodID classMethodID =
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        aJNIEnv->GetMethodID(
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            aJNIEnv->GetObjectClass(aJavaOutputStreamWriter),
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            "write",
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            "(II)V");
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    if (!classMethodID)
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    {
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        DEBUG("CMMAOutputStream::ConstructL: Cannot find java method");
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   111
        User::Panic(_L("Java method write(II)V not found"), KErrGeneral);
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   112
    }
04becd199f91 Revision: v2.1.22
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parents:
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   113
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   114
    iWriteEvent = new(ELeave) CMMAOutputStreamEvent(classMethodID,
04becd199f91 Revision: v2.1.22
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   115
            aJavaOutputStreamWriter);
04becd199f91 Revision: v2.1.22
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   116
}
04becd199f91 Revision: v2.1.22
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   117
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   118
void CMMAOutputStream::ReadDataL(TUint8* aOutputData,
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   119
                                 TInt* aBufferSize,
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   120
                                 TInt* aReadStatus)
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   121
{
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   122
    if (!iData)
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   123
    {
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   124
        User::Leave(KErrNotReady);
04becd199f91 Revision: v2.1.22
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   125
    }
04becd199f91 Revision: v2.1.22
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   126
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    // Status code to be returned
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   128
    TInt status = KErrNone;
04becd199f91 Revision: v2.1.22
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   129
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    TPtr8 buffer(aOutputData, *aBufferSize);
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   131
    DEBUG_INT(" MMA::CMMAOutputStream::ReadDataL SIZE BEFORE READL %d", buffer.Length());
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   132
    DEBUG_INT(" MMA::CMMAOutputStream::ReadDataL BYTES AVAILABLE %d", iPtr.Length());
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   133
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    // Bytes available in native buffer
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    TInt bytesAvailable = iPtr.Length();
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   136
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    // Maximum size that can be written to Java buffer
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    TInt outputMaxLength = buffer.MaxLength();
04becd199f91 Revision: v2.1.22
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   139
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   140
    // Length that can be written
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   141
    TInt writeLength = 0;
04becd199f91 Revision: v2.1.22
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   142
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   143
    if (outputMaxLength < bytesAvailable)
04becd199f91 Revision: v2.1.22
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   144
    {
04becd199f91 Revision: v2.1.22
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        // Not all bytes can be written Java buffer
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        writeLength = outputMaxLength;
04becd199f91 Revision: v2.1.22
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   147
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        // Java need to read more data
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        status = EMoreData;
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    }
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   151
    else
04becd199f91 Revision: v2.1.22
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   152
    {
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        // All bytes can be written to Java buffer
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        writeLength = bytesAvailable;
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   155
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        // All data is copied
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        status = ECompleted;
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    }
04becd199f91 Revision: v2.1.22
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   159
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    // Copy maximum number of bytes to Java buffer
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    buffer.Copy(iPtr.Left(writeLength));
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    *aBufferSize = buffer.Length();
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   163
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    // Move pointer to next read position.
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    iPtr = iPtr.Mid(writeLength);
04becd199f91 Revision: v2.1.22
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   166
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   167
    DEBUG_INT(" MMA::CMMAOutputStream::ReadDataL SIZE AFTER READL %d", buffer.Length());
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   168
    DEBUG_INT(" MMA::CMMAOutputStream::ReadDataL RETURN %d", status);
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   169
    DEBUG_INT(" MMA::CMMAOutputStream::ReadDataL dataLeft %d", iPtr.Length());
04becd199f91 Revision: v2.1.22
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   170
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   171
    if (iPtr.Length() == 0)
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   172
    {
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        // All data is read and buffer is not needed anymore.
04becd199f91 Revision: v2.1.22
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        delete iData;
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   175
        iData = NULL;
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   176
    }
04becd199f91 Revision: v2.1.22
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    *aReadStatus = status;
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   178
}
04becd199f91 Revision: v2.1.22
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   179
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void CMMAOutputStream::WriteL(const TDesC8& aData)
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{
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   182
    DEBUG_INT("CMMAOutputStream::WriteL data size = %d", aData.Size());
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   183
    if (iData)
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   184
    {
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   185
        // Previous data was not readed from the stream.
04becd199f91 Revision: v2.1.22
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   186
        User::Leave(KErrNotReady);
04becd199f91 Revision: v2.1.22
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   187
    }
04becd199f91 Revision: v2.1.22
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   188
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   189
    if (aData.Length() > 0)
04becd199f91 Revision: v2.1.22
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   190
    {
04becd199f91 Revision: v2.1.22
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   191
        // Take a copy of new data.
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   192
        HBufC8* data = aData.AllocL();
04becd199f91 Revision: v2.1.22
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   193
        delete iData;
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   194
        iData = data;
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   195
        iPtr.Set(iData->Des());
04becd199f91 Revision: v2.1.22
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   196
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        // Set java event
04becd199f91 Revision: v2.1.22
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   198
        DEBUG_INT("CMMAOutputStream::WriteL: available data: %d", iData->Length());
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   199
        iWriteEvent->SetLength(iData->Length());
04becd199f91 Revision: v2.1.22
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   200
        iWriteEvent->SetStatus(EMoreData);
04becd199f91 Revision: v2.1.22
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   201
    }
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   202
    else
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diff changeset
   203
    {
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   204
        DEBUG("CMMAOutputStream::WriteL Zero length data");
04becd199f91 Revision: v2.1.22
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   205
        iWriteEvent->SetLength(0);
04becd199f91 Revision: v2.1.22
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   206
        iWriteEvent->SetStatus(ECompleted);
04becd199f91 Revision: v2.1.22
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   207
    }
04becd199f91 Revision: v2.1.22
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   208
    iEventSource->PostEvent(iWriteEvent, CMMAEvent::ENotifyPriority);
04becd199f91 Revision: v2.1.22
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   209
}
04becd199f91 Revision: v2.1.22
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   210
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   211
void CMMAOutputStream::Commit()
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   212
{
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   213
    iWriteEvent->SetLength(0);
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   214
    iWriteEvent->SetStatus(KMMACommit);
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parents:
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   215
    iEventSource->PostEvent(iWriteEvent, CMMAEvent::ENotifyPriority);
04becd199f91 Revision: v2.1.22
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   216
}
04becd199f91 Revision: v2.1.22
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   217
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//  END OF FILE
04becd199f91 Revision: v2.1.22
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parents:
diff changeset
   219