michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsTemporaryFileInputStream_h__
michael@0: #define nsTemporaryFileInputStream_h__
michael@0: 
michael@0: #include "mozilla/Mutex.h"
michael@0: #include "nsIInputStream.h"
michael@0: #include "nsAutoPtr.h"
michael@0: #include "prio.h"
michael@0: 
michael@0: class nsTemporaryFileInputStream : public nsIInputStream
michael@0: {
michael@0: public:
michael@0:   //used to release a PRFileDesc
michael@0:   class FileDescOwner
michael@0:   {
michael@0:     friend class nsTemporaryFileInputStream;
michael@0:   public:
michael@0:     NS_INLINE_DECL_THREADSAFE_REFCOUNTING(FileDescOwner)
michael@0:     FileDescOwner(PRFileDesc* aFD)
michael@0:       : mFD(aFD),
michael@0:         mMutex("FileDescOwner::mMutex")
michael@0:     {
michael@0:       MOZ_ASSERT(aFD);
michael@0:     }
michael@0:     ~FileDescOwner()
michael@0:     {
michael@0:       PR_Close(mFD);
michael@0:     }
michael@0:     mozilla::Mutex& FileMutex() { return mMutex; }
michael@0: 
michael@0:   private:
michael@0:     PRFileDesc* mFD;
michael@0:     mozilla::Mutex mMutex;
michael@0:   };
michael@0: 
michael@0:   nsTemporaryFileInputStream(FileDescOwner* aFileDescOwner, uint64_t aStartPos, uint64_t aEndPos);
michael@0: 
michael@0:   virtual ~nsTemporaryFileInputStream() { }
michael@0: 
michael@0:   NS_DECL_THREADSAFE_ISUPPORTS
michael@0:   NS_DECL_NSIINPUTSTREAM
michael@0: 
michael@0: private:
michael@0:   nsRefPtr<FileDescOwner> mFileDescOwner;
michael@0:   uint64_t mStartPos;
michael@0:   uint64_t mEndPos;
michael@0:   bool mClosed;
michael@0: };
michael@0: 
michael@0: #endif // nsTemporaryFileInputStream_h__