LCOV - app.info - netwerk/cache/nsDiskCacheStreams.h

LCOV - code coverage report
| Current view: | directory - netwerk/cache - nsDiskCacheStreams.h (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 5 | 5 | 100.0 %
| Date: | 2012-04-21 | Functions: | 2 | 2 | 100.0 %

           1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
           2                 :  *
           3                 :  * ***** BEGIN LICENSE BLOCK *****
           4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           5                 :  *
           6                 :  * The contents of this file are subject to the Mozilla Public License Version
           7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           8                 :  * the License. You may obtain a copy of the License at
           9                 :  * http://www.mozilla.org/MPL/
          10                 :  *
          11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          13                 :  * for the specific language governing rights and limitations under the
          14                 :  * License.
          15                 :  *
          16                 :  * The Original Code is nsDiskCacheStreams.h, released
          17                 :  * June 13, 2001.
          18                 :  *
          19                 :  * The Initial Developer of the Original Code is
          20                 :  * Netscape Communications Corporation.
          21                 :  * Portions created by the Initial Developer are Copyright (C) 2001
          22                 :  * the Initial Developer. All Rights Reserved.
          23                 :  *
          24                 :  * Contributor(s):
          25                 :  *   Gordon Sheridan <gordon@netscape.com>
          26                 :  *
          27                 :  * Alternatively, the contents of this file may be used under the terms of
          28                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
          29                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          30                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          31                 :  * of those above. If you wish to allow use of your version of this file only
          32                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          33                 :  * use your version of this file under the terms of the MPL, indicate your
          34                 :  * decision by deleting the provisions above and replace them with the notice
          35                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          36                 :  * the provisions above, a recipient may use your version of this file under
          37                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          38                 :  *
          39                 :  * ***** END LICENSE BLOCK ***** */
          40                 :
          41                 :
          42                 : #ifndef _nsDiskCacheStreams_h_
          43                 : #define _nsDiskCacheStreams_h_
          44                 :
          45                 : #include "nsDiskCacheBinding.h"
          46                 :
          47                 : #include "nsCache.h"
          48                 :
          49                 : #include "nsIInputStream.h"
          50                 : #include "nsIOutputStream.h"
          51                 :
          52                 : #include "pratom.h"
          53                 :
          54                 : class nsDiskCacheInputStream;
          55                 : class nsDiskCacheOutputStream;
          56                 : class nsDiskCacheDevice;
          57                 :
          58                 : class nsDiskCacheStreamIO : public nsISupports {
          59                 : public:
          60                 :              nsDiskCacheStreamIO(nsDiskCacheBinding *   binding);
          61                 :     virtual ~nsDiskCacheStreamIO();
          62                 :
          63                 :     NS_DECL_ISUPPORTS
          64                 :
          65                 :     nsresult    GetInputStream(PRUint32 offset, nsIInputStream ** inputStream);
          66                 :     nsresult    GetOutputStream(PRUint32 offset, nsIOutputStream ** outputStream);
          67                 :
          68                 :     nsresult    CloseOutputStream(nsDiskCacheOutputStream * outputStream);
          69                 :     nsresult    CloseOutputStreamInternal(nsDiskCacheOutputStream * outputStream);
          70                 :
          71                 :     nsresult    Write( const char * buffer,
          72                 :                        PRUint32     count,
          73                 :                        PRUint32 *   bytesWritten);
          74                 :
          75                 :     nsresult    Seek(PRInt32 whence, PRInt32 offset);
          76                 :     nsresult    Tell(PRUint32 * position);
          77                 :     nsresult    SetEOF();
          78                 :
          79                 :     nsresult    ClearBinding();
          80                 :
          81             172 :     void        IncrementInputStreamCount() { PR_ATOMIC_INCREMENT(&mInStreamCount); }
          82             172 :     void        DecrementInputStreamCount()
          83                 :                 {
          84             172 :                     PR_ATOMIC_DECREMENT(&mInStreamCount);
          85             172 :                     NS_ASSERTION(mInStreamCount >= 0, "mInStreamCount has gone negative");
          86             172 :                 }
          87                 :
          88                 :     // GCC 2.95.2 requires this to be defined, although we never call it.
          89                 :     // and OS/2 requires that it not be private
          90                 :     nsDiskCacheStreamIO() { NS_NOTREACHED("oops"); }
          91                 : private:
          92                 :
          93                 :
          94                 :     void        Close();
          95                 :     nsresult    OpenCacheFile(PRIntn flags, PRFileDesc ** fd);
          96                 :     nsresult    ReadCacheBlocks();
          97                 :     nsresult    FlushBufferToFile();
          98                 :     void        UpdateFileSize();
          99                 :     void        DeleteBuffer();
         100                 :     nsresult    Flush();
         101                 :
         102                 :
         103                 :     nsDiskCacheBinding *        mBinding;       // not an owning reference
         104                 :     nsDiskCacheDevice *         mDevice;
         105                 :     nsDiskCacheOutputStream *   mOutStream;     // not an owning reference
         106                 :     PRInt32                     mInStreamCount;
         107                 :     nsCOMPtr<nsILocalFile>      mLocalFile;
         108                 :     PRFileDesc *                mFD;
         109                 :
         110                 :     PRUint32                    mStreamPos;     // for Output Streams
         111                 :     PRUint32                    mStreamEnd;
         112                 :     PRUint32                    mBufPos;        // current mark in buffer
         113                 :     PRUint32                    mBufEnd;        // current end of data in buffer
         114                 :     PRUint32                    mBufSize;       // current end of buffer
         115                 :     bool                        mBufDirty;
         116                 :     char *                      mBuffer;
         117                 :
         118                 : };
         119                 :
         120                 : #endif // _nsDiskCacheStreams_h_

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