1 // Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
2 // All rights reserved.
3 // This component and the accompanying materials are made available
4 // under the terms of "Eclipse Public License v1.0"
5 // which accompanies this distribution, and is available
6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
8 // Initial Contributors:
9 // Nokia Corporation - initial contribution.
15 // estor.mmh Stream store management - default file buffer size,
16 // max read ahead value and file block size.
17 // This file is an example file that may be copied, modified and
18 // installed as \epoc32\include\Estor.mmh file to customise buffer handling
19 // in the Store component. Also, SYMBIAN_CUSTOM_STORE_BUFFER_SIZES must be
20 // defined in the related \epoc32\include\variant\Symbian_OS_v<N>.hrh file,
21 // where <N> is the OS version number, like 9.1.
22 // This file is not expected to be directly modified.
23 // NOTE: Changing the value of these macros will affect RAM usage in
24 // store/stream processing system wide and should not be undertaken lightly.
25 // Default file buffer size in bytes used in RFileBuf objects.
26 // It can't be less than 1536 bytes.
34 MACRO DEFAULT_FILE_BUF_SIZE=4096
37 Maximum RFileBuf read ahead value in bytes. This defines the number of bytes
38 read into the file buffer when buffer underflow occurs.
39 It can't be less than 512 bytes and must not be greater
40 than DEFAULT_FILE_BUF_SIZE.
43 MACRO MAX_READ_AHEAD_VALUE=2048
46 File system block size to be assumed by RFileBuf. It is used in buffer underflow
47 to perform block aligned reads to load the buffer.
48 It can't be less than 512 bytes and must not be greater
49 then MAX_READ_AHEAD_VALUE. Also, FILE_BLOCK_SIZE value must be power of 2.
52 MACRO FILE_BLOCK_SIZE=1024