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1405.4.1
by Jay Pipes
Adds a vector of write buffers to the transaction log applier |
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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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*
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* Copyright (c) 2010 Jay Pipes <jaypipes@gmail.com>
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*
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* Authors:
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*
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* Jay Pipes <jaypipes@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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*
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* Defines a simple structure for maintaining a write buffer.
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*/
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#ifndef PLUGIN_TRANSACTION_LOG_WRITE_BUFFER_H
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#define PLUGIN_TRANSACTION_LOG_WRITE_BUFFER_H
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#include <stdint.h> |
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1405.5.1
by Jay Pipes
Changes uint8_t * to vector<uint8_t>. |
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#include <vector> |
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1405.4.1
by Jay Pipes
Adds a vector of write buffers to the transaction log applier |
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#include <pthread.h> |
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class WriteBuffer |
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{
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public: |
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static const size_t DEFAULT_WRITE_BUFFER_SIZE= 1024; /* Many GPB messages are < 1 KB... */ |
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/**
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* Constructor.
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*/
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WriteBuffer(); |
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~WriteBuffer(); |
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/**
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* Locks the log write buffer
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*/
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void lock() |
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{
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pthread_mutex_lock(&latch); |
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}
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/**
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* Unlocks the log's write buffer
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*/
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void unlock() |
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{
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pthread_mutex_unlock(&latch); |
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}
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/**
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* Resizes the internal raw byte buffer
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*
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* @param[in] New size to allocate
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*/
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void resize(size_t new_size); |
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/**
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* Returns the pointer to the raw bytes.
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*/
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uint8_t *getRawBytes() |
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{
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1405.5.1
by Jay Pipes
Changes uint8_t * to vector<uint8_t>. |
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return &buffer[0]; |
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1405.4.1
by Jay Pipes
Adds a vector of write buffers to the transaction log applier |
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}
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/**
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* Returns the size of the write buffer
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*/
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size_t getCapacity() |
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{
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1405.5.1
by Jay Pipes
Changes uint8_t * to vector<uint8_t>. |
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return buffer.size(); |
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1405.4.1
by Jay Pipes
Adds a vector of write buffers to the transaction log applier |
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}
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private: |
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/* Prohibit these */
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WriteBuffer(const WriteBuffer&); |
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WriteBuffer &operator=(const WriteBuffer&); |
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1405.5.1
by Jay Pipes
Changes uint8_t * to vector<uint8_t>. |
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std::vector<uint8_t> buffer; ///< Raw memory buffer managed by the log |
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1405.4.1
by Jay Pipes
Adds a vector of write buffers to the transaction log applier |
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pthread_mutex_t latch; ///< Lock around the synchronized parts of the log (the write buffer) |
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};
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1405.4.12
by Jay Pipes
Fix cpplint header guard. |
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#endif /* PLUGIN_TRANSACTION_LOG_WRITE_BUFFER_H */ |