casyncbuffer.cp
上传用户:zhongxx05
上传日期:2007-06-06
资源大小:33641k
文件大小:4k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "CAsyncBuffer.h"
- #include <string.h>
- const long kBlankLong[] = {'FNRD','fnrd'};
- CAsyncBuffer::CAsyncBuffer (
- Size inSize,
- QElemPtr inpb/*= nil*/)
-
- : mBuffer (nil)
- , mSize (0)
- , mLim (0)
- , mMark (0)
- , mBusy (FALSE)
-
- , mClearIndex (0)
-
- { /* begin CAsyncBuffer */
-
- ::memset (&mPBQueue, 0, sizeof (mPBQueue));
- PBFree (inpb);
-
- // if (nil != (mBuffer = (Ptr) new char [inSize]))
- if (nil != (mBuffer = (Ptr) ::NewPtr(inSize)))
- mSize = inSize;
- } /* end CAsyncBuffer */
-
- CAsyncBuffer::~CAsyncBuffer (void)
- { /* begin ~CAsyncBuffer */
-
- if (mBuffer)
- ::DisposePtr(mBuffer);
- // delete [] mBuffer;
- mBuffer = nil;
-
- mSize =
- mLim =
- mMark = 0;
-
- } /* end ~CAsyncBuffer */
-
- long CAsyncBuffer::Read (
- void *rcvBuff,
- long rcvBuffLen)
-
- { /* begin Read */
-
- long remaining = Remaining ();
-
- if (rcvBuffLen > remaining) rcvBuffLen = remaining;
-
- if (rcvBuffLen) {
- if (rcvBuff) ::BlockMoveData (mBuffer + mMark, (Ptr) rcvBuff, rcvBuffLen);
- mMark += rcvBuffLen;
- } /* if */
-
- return rcvBuffLen;
-
- } /* end Read */
-
- long CAsyncBuffer::Write (
- const void *sndBuff,
- long sndBuffLen)
-
- { /* begin Write */
-
- long remaining = mSize - mMark;
-
- if (sndBuffLen > remaining) sndBuffLen = remaining;
-
- if (sndBuffLen) {
- if (sndBuff) ::BlockMoveData ((Ptr) sndBuff, mBuffer + mMark, sndBuffLen);
- mMark += sndBuffLen;
- if (mLim < mMark) mLim = mMark;
- } /* if */
-
- return sndBuffLen;
-
- } /* end Write */
- void CAsyncBuffer::ClearBuffer (void)
- { /* begin ClearBuffer */
-
- long *p = (long *) mBuffer;
- for (long i = (mLim / sizeof (*p)); i-- > 0; )
- p[i] = kBlankLong[mClearIndex];
-
- } /* end ClearBuffer */
-
- void CAsyncBuffer::DebugBuffer (void)
- { /* begin DebugBuffer */
-
- for (short b = 0; b < (sizeof (kBlankLong) / sizeof (kBlankLong[0])); b++) {
- long blank = 0;
- long *p = (long *) mBuffer;
-
- for (long i = 0; i < (mLim / sizeof (*p)); i++)
- if (kBlankLong[b] == p [i]) blank++;
-
- if (blank > 10) DebugStr ((mClearIndex == b) ? "pNew" : "pStale");
- } /* for */
-
- } /* end DebugBuffer */