diff -r 000000000000 -r 6474c204b198 netwerk/cache/nsDiskCacheStreams.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/cache/nsDiskCacheStreams.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,70 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+#ifndef _nsDiskCacheStreams_h_
+#define _nsDiskCacheStreams_h_
+
+#include "mozilla/MemoryReporting.h"
+#include "nsDiskCacheBinding.h"
+
+#include "nsCache.h"
+
+#include "nsIInputStream.h"
+#include "nsIOutputStream.h"
+
+#include "mozilla/Atomics.h"
+
+class nsDiskCacheInputStream;
+class nsDiskCacheDevice;
+
+class nsDiskCacheStreamIO : public nsIOutputStream {
+public:
+             nsDiskCacheStreamIO(nsDiskCacheBinding *   binding);
+    virtual ~nsDiskCacheStreamIO();
+    
+    NS_DECL_THREADSAFE_ISUPPORTS
+    NS_DECL_NSIOUTPUTSTREAM
+
+    nsresult    GetInputStream(uint32_t offset, nsIInputStream ** inputStream);
+    nsresult    GetOutputStream(uint32_t offset, nsIOutputStream ** outputStream);
+
+    nsresult    ClearBinding();
+    
+    void        IncrementInputStreamCount() { mInStreamCount++; }
+    void        DecrementInputStreamCount()
+                {
+                    mInStreamCount--;
+                    NS_ASSERTION(mInStreamCount >= 0, "mInStreamCount has gone negative");
+                }
+
+    size_t     SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf);
+
+    // GCC 2.95.2 requires this to be defined, although we never call it.
+    // and OS/2 requires that it not be private
+    nsDiskCacheStreamIO() { NS_NOTREACHED("oops"); }
+
+private:
+    nsresult    OpenCacheFile(int flags, PRFileDesc ** fd);
+    nsresult    ReadCacheBlocks(uint32_t bufferSize);
+    nsresult    FlushBufferToFile();
+    void        UpdateFileSize();
+    void        DeleteBuffer();
+    nsresult    CloseOutputStream();
+    nsresult    SeekAndTruncate(uint32_t offset);
+
+    nsDiskCacheBinding *        mBinding;       // not an owning reference
+    nsDiskCacheDevice *         mDevice;
+    mozilla::Atomic<int32_t>                     mInStreamCount;
+    PRFileDesc *                mFD;
+
+    uint32_t                    mStreamEnd;     // current size of data
+    uint32_t                    mBufSize;       // current end of buffer
+    char *                      mBuffer;
+    bool                        mOutputStreamIsOpen;
+};
+
+#endif // _nsDiskCacheStreams_h_