userlibandfileserver/fileserver/sfsrv/cl_clamp.cpp
author Slion
Tue, 08 Dec 2009 08:11:42 +0100
branchanywhere
changeset 19 f6d3d9676ee4
parent 0 a41df078684a
child 36 538db54a451d
permissions -rw-r--r--
Trying to figure out how to implement my WINC like compatibility layer. Going the emulation way is probably not so smart. We should not use the kernel but rather hook native functions in the Exec calls.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
0
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
     1
// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
     2
// All rights reserved.
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
     3
// This component and the accompanying materials are made available
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
     4
// under the terms of the License "Eclipse Public License v1.0"
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
     5
// which accompanies this distribution, and is available
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
     6
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
     7
//
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
     8
// Initial Contributors:
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
     9
// Nokia Corporation - initial contribution.
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    10
//
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    11
// Contributors:
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    12
//
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    13
// Description:
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    14
// f32\sfsrv\cl_clamp.cpp
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    15
// 
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    16
//
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    17
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    18
#include <f32file.h>
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    19
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    20
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    21
EXPORT_C TInt RFileClamp::Clamp(RFile& aFile)
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    22
/**
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    23
	Clamp the supplied file and store the resulting cookie in this object.
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    24
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    25
	@param	aFile			File to clamp.
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    26
	@return					Symbian OS error code.
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    27
 */
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    28
	{
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    29
	return aFile.Clamp(*this);
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    30
	}
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    31
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    32
EXPORT_C TInt RFileClamp::Close(RFs& aFs)
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    33
/**
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    34
	Unclamp the file which was clamped with this object.
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    35
	It is safe to call this function a handle that was not
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    36
	successfully opened.
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    37
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    38
	@param	aFs				File server session which was used to
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    39
							generate this clamp cookie value.
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    40
	@return					Symbian OS error code.
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    41
 */
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    42
	{
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    43
	TInt r = KErrNone;
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    44
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    45
	TBool opened = !(iCookie[0] == 0 && iCookie[1] == 0);
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    46
	if (opened)
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    47
		{
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    48
		r = aFs.Unclamp(*this);
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    49
		if (r == KErrNone)
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    50
			*this = RFileClamp();
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    51
		}
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    52
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    53
	return r;
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    54
	}
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    55
a41df078684a Convert Kernelhwsrv package from SFL to EPL
John Imhofe
parents:
diff changeset
    56