LongSignal.hpp
上传用户:romrleung
上传日期:2022-05-23
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文件大小:2k
- /* Copyright (C) 2003 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #ifndef LONG_SIGNAL_HPP
- #define LONG_SIGNAL_HPP
- #include "pc.hpp"
- #include <ArrayPool.hpp>
- /**
- * Section handling
- */
- struct SectionSegment {
- STATIC_CONST( DataLength = NDB_SECTION_SEGMENT_SZ );
-
- Uint32 m_ownerRef;
- Uint32 m_sz;
- Uint32 m_lastSegment;
- union {
- Uint32 m_nextSegment;
- Uint32 nextPool;
- };
- Uint32 theData[DataLength];
- };
- /**
- * Pool for SectionSegments
- */
- class SectionSegmentPool : public ArrayPool<SectionSegment> {};
- /**
- * And the instance
- */
- extern SectionSegmentPool g_sectionSegmentPool;
- /**
- * Function prototypes
- */
- void print(SegmentedSectionPtr ptr, FILE* out);
- void copy(SegmentedSectionPtr dst, Uint32 * src, Uint32 len);
- void copy(Uint32 * dst, SegmentedSectionPtr src);
- extern class SectionSegmentPool g_sectionSegmentPool;
- void getSection(SegmentedSectionPtr & ptr, Uint32 id);
- void linkSegments(Uint32 head, Uint32 tail);
- void getSections(Uint32 secCount, SegmentedSectionPtr ptr[3]);
- void releaseSections(Uint32 secCount, SegmentedSectionPtr ptr[3]);
- #include "DataBuffer.hpp"
- template<Uint32 sz>
- void
- append(DataBuffer<sz>& dst, SegmentedSectionPtr ptr, SectionSegmentPool& pool){
- Uint32 len = ptr.sz;
- while(len > SectionSegment::DataLength){
- dst.append(ptr.p->theData, SectionSegment::DataLength);
- ptr.p = pool.getPtr(ptr.p->m_nextSegment);
- len -= SectionSegment::DataLength;
- }
- dst.append(ptr.p->theData, len);
- }
- #endif