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SendBuffer.cpp
Package: mysql-4.1.16-win-src.zip [view]
Upload User: romrleung
Upload Date: 2022-05-23
Package Size: 18897k
Code Size: 2k
Category:
MySQL
Development Platform:
Visual C++
- /* 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 */
- #include "SendBuffer.hpp"
- #include "TransporterInternalDefinitions.hpp"
- SendBuffer::SendBuffer(Uint32 bufSize) {
- sizeOfBuffer = bufSize;
- if(sizeOfBuffer < MAX_MESSAGE_SIZE)
- sizeOfBuffer = 2 * MAX_MESSAGE_SIZE;
- startOfBuffer = NULL;
- // Initalise pointers
- endOfBuffer = NULL;
- insertPtr = NULL;
- sendPtr = NULL;
- sendDataSize = 0;
- dataSize = 0;
- }
- bool
- SendBuffer::initBuffer(Uint32 aRemoteNodeId) {
- // Allocate memory for the buffer
- #ifdef DEBUG_TRANSPORTER
- ndbout << "Allocating " << sizeOfBuffer << " bytes for send buffer" << endl;
- #endif
- startOfBuffer = new Uint32[(sizeOfBuffer >> 2) + 1];
- endOfBuffer = startOfBuffer + (sizeOfBuffer >> 2);
- emptyBuffer();
- theRemoteNodeId = aRemoteNodeId;
- return true;
- }
- SendBuffer::~SendBuffer() {
- // Deallocate the buffer memory
- if(startOfBuffer != NULL)
- delete[] startOfBuffer;
- }
- int
- SendBuffer::bufferSize() {
- return dataSize;
- }
- Uint32
- SendBuffer::bufferSizeRemaining() const {
- return (sizeOfBuffer - dataSize);
- }
- void
- SendBuffer::emptyBuffer() {
- insertPtr = startOfBuffer;
- sendPtr = (char*)startOfBuffer;
- dataSize = 0;
- sendDataSize = 0;
- }
- #ifdef DEBUG_TRANSPORTER
- void
- SendBuffer::print() {
- printf("SendBuffer status printoutsn");
- printf( "sizeOfBuffer: %dn", sizeOfBuffer);
- printf( "startOfBuffer: %.8xn", startOfBuffer);
- printf( "endOfBuffer: %.8xn", endOfBuffer);
- printf( "insertPtr: %.8xn", insertPtr);
- printf( "sendPtr: %.8xn", sendPtr);
- printf( "sendDataSize: %dn", sendDataSize);
- printf( "dataSize: %dn", dataSize);
- }
- #endif