Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim:set ts=2 sw=2 sts=2 et cindent: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #ifndef SimpleBuffer_h__
       8             : #define SimpleBuffer_h__
       9             : 
      10             : /*
      11             :   This class is similar to a nsPipe except it does not have any locking, stores
      12             :   an unbounded amount of data, can only be used on one thread, and has much
      13             :   simpler result code semantics to deal with.
      14             : */
      15             : 
      16             : #include "prtypes.h"
      17             : #include "mozilla/LinkedList.h"
      18             : #include "nsIThreadInternal.h"
      19             : 
      20             : namespace mozilla {
      21             : namespace net {
      22             : 
      23           0 : class SimpleBufferPage : public LinkedListElement<SimpleBufferPage>
      24             : {
      25             : public:
      26           0 :   SimpleBufferPage() : mReadOffset(0), mWriteOffset(0) {}
      27             :   static const size_t kSimpleBufferPageSize = 32000;
      28             : 
      29             : private:
      30             :   friend class SimpleBuffer;
      31             :   char mBuffer[kSimpleBufferPageSize];
      32             :   size_t mReadOffset;
      33             :   size_t mWriteOffset;
      34             : };
      35             : 
      36             : class SimpleBuffer
      37             : {
      38             : public:
      39             :   SimpleBuffer();
      40           0 :   ~SimpleBuffer() {}
      41             : 
      42             :   nsresult Write(char *stc, size_t len); // return OK or OUT_OF_MEMORY
      43             :   size_t Read(char *dest, size_t maxLen); // return bytes read
      44             :   size_t Available();
      45             :   void Clear();
      46             : 
      47             : private:
      48             :   NS_DECL_OWNINGTHREAD
      49             : 
      50             :   nsresult mStatus;
      51             :   AutoCleanLinkedList<SimpleBufferPage> mBufferList;
      52             :   size_t mAvailable;
      53             : };
      54             : 
      55             : } // namespace net
      56             : } // namespace mozilla
      57             : 
      58             : #endif