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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdlib.h>
#include "utils.hpp"
#include "drill/common.hpp"
namespace Drill{
boost::mutex AllocatedBuffer::s_memCVMutex;
boost::condition_variable AllocatedBuffer::s_memCV;
size_t AllocatedBuffer::s_allocatedMem=0;
bool AllocatedBuffer::s_isBufferLimitReached=false;
ByteBuf_t Utils::allocateBuffer(size_t len){
boost::lock_guard<boost::mutex> memLock(AllocatedBuffer::s_memCVMutex);
AllocatedBuffer::s_allocatedMem+=len;
//http://stackoverflow.com/questions/2688466/why-mallocmemset-is-slower-than-calloc
ByteBuf_t b = (ByteBuf_t)calloc(len, sizeof(Byte_t));
size_t safeSize= DrillClientConfig::getBufferLimit()-MEM_CHUNK_SIZE;
if(b!=NULL && AllocatedBuffer::s_allocatedMem >= safeSize){
AllocatedBuffer::s_isBufferLimitReached=true;
}
return b;
}
void Utils::freeBuffer(ByteBuf_t b, size_t len){
boost::lock_guard<boost::mutex> memLock(AllocatedBuffer::s_memCVMutex);
AllocatedBuffer::s_allocatedMem-=len;
free(b);
size_t safeSize= DrillClientConfig::getBufferLimit()-MEM_CHUNK_SIZE;
if(b!=NULL && AllocatedBuffer::s_allocatedMem < safeSize){
AllocatedBuffer::s_isBufferLimitReached=false;
//signal any waiting threads
AllocatedBuffer::s_memCV.notify_one();
}
}
AllocatedBuffer::AllocatedBuffer(size_t l){
m_pBuffer=NULL;
m_pBuffer=Utils::allocateBuffer(l);
m_bufSize=m_pBuffer!=NULL?l:0;
}
AllocatedBuffer::~AllocatedBuffer(){
Utils::freeBuffer(m_pBuffer, m_bufSize);
m_pBuffer=NULL;
m_bufSize=0;
}
} // namespace
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