sio.cpp
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上传日期:2007-06-06
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文件大小:3k
- /* ***** 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 "hlxclib/stdio.h"
- #include "hxtypes.h"
- #include "debug.h"
- #include "bio.h"
- #include "sio.h"
- #include "hxheap.h"
- #include "hxassert.h"
- #ifdef _DEBUG
- #undef HX_THIS_FILE
- static const char HX_THIS_FILE[] = __FILE__;
- #endif
- SIO::Region*
- SIO::Region_list::find(Byte* buf, SIO::Region**& regp)
- {
- Region* r;
- Region **rp;
- for (rp = ®s; (r = *rp) != 0; rp = &r->next)
- {
- if (r->base <= buf && buf < r->limit)
- {
- regp = rp;
- return r;
- }
- }
- regp = rp;
- return 0;
- }
- SIO::Region*
- SIO::Region_list::find(off_t offt, SIO::Region**& regp)
- {
- Region* r;
- Region **rp;
- for (rp = ®s; (r = *rp) != 0; rp = &r->next)
- {
- if (offt < r->off)
- break;
- if (r->off + r->limit - r->base < offt)
- continue;
- regp = rp;
- return r;
- }
- regp = rp;
- return 0;
- }
- Byte*
- SIO::Region_list::remove(Region* reg)
- {
- Region* r;
- for (Region** rp = ®s; (r = *rp) != 0; rp = &r->next)
- if (r == reg)
- {
- *rp = r->next;
- Byte* b = r->base;
- delete r;
- return b;
- }
- return 0;
- }
- int
- SIO::write_flush_count()
- {
- Region* r = writer.regs;
- int count = 0;
-
- while (r && r->refcount == 0 && r != writer.creg)
- {
- count += HX_SAFEINT(r->limit - r->base - (r->flush_off - r->off));
- r = r->next;
- }
- return count;
- }
- BOOL
- SIO::write_flush_needed()
- {
- Region* r = writer.regs;
-
- while (r && r->refcount == 0 && r != writer.creg)
- {
- if (HX_SAFEINT(r->limit - r->base - (r->flush_off - r->off)))
- return TRUE;
- r = r->next;
- }
-
- return FALSE;
- }