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Copy pathMemoryManager.cpp
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229 lines (193 loc) · 5.44 KB
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// Last modified: 2012-10-18 17:39:55
/**
* @file: MemoryManager.cpp
* @author: tongjiancong([email protected])
* @date: 2012-08-27 09:41:48
* @brief:
**/
/* Talk is cheap, show me the code. */
/* Good luck and have fun. */
#include <cstdio>
#include <cassert>
#include <cstring>
#include <iostream>
#include <unistd.h>
#include <sys/uio.h>
#include "hash.h"
#include "function.h"
#include "MemoryManager.h"
//#define READV
MemoryManager::MemoryManager(unsigned long long _size, unsigned int _blockNum)
{
memorySize = _size;
numBlock = _blockNum;
pMemory = (unsigned int *)malloc(memorySize);
checkPointer((void *)pMemory, __LINE__);
offsetArray = (unsigned long long *)malloc(numBlock * sizeof(unsigned long long));
checkPointer((void *)offsetArray, __LINE__);
for (unsigned int i = 0; i < numBlock; ++i)
{
offsetArray[i] = (unsigned long long)i * BLOCKSIZE;
}
headFree = (blockunit_t *)malloc(sizeof(blockunit_t));
checkPointer((void *)headFree, __LINE__);
tailFree = (blockunit_t *)malloc(sizeof(blockunit_t));
checkPointer((void *)tailFree, __LINE__);
unitArray = (blockunit_t **)malloc(numBlock * sizeof(blockunit_t *));
checkPointer((void *)unitArray, __LINE__);
for (unsigned int i = 0; i < numBlock; ++i)
{
unitArray[i] = (blockunit_t *)malloc(sizeof(blockunit_t));
checkPointer((void *)unitArray[i], __LINE__);
unitArray[i]->m_index_Global = i;
unitArray[i]->m_index_List = 0;
unitArray[i]->m_used_int = 0;
}
unitArray[0]->b_next = unitArray[1];
unitArray[0]->b_prev = headFree;
for (unsigned int i = 1; i < numBlock - 1; ++i)
{
unitArray[i]->b_next = unitArray[i + 1];
unitArray[i]->b_prev = unitArray[i - 1];
}
unitArray[numBlock - 1]->b_next = NULL;
unitArray[numBlock - 1]->b_prev = unitArray[numBlock - 2];
headFree->b_next = unitArray[0];
tailFree = unitArray[numBlock - 1];
if (pthread_mutex_init(&m_mutex_memory, NULL) != 0)
{
printf("mutex_memory init failed.\n");
exit(-1);
}
}
MemoryManager::~MemoryManager()
{
freeResource(pMemory);
freeResource(offsetArray);
for (unsigned int i = 0; i < numBlock; ++i)
{
freeResource(unitArray[i]);
}
freeResource(unitArray);
freeResource(headFree);
//freeResource(tailFree);
pthread_mutex_destroy(&m_mutex_memory);
}
void MemoryManager::InsertData(
blockunit_t **start_node,
unsigned int termid,
unsigned int listLength,
unsigned long long offset)
{
assert(pIndex != NULL);
assert(listLength > 0);
assert(offset >= 0);
mm_lock_mutex();
*start_node = headFree->b_next;
blockunit_t *temp = headFree->b_next;
temp->b_prev = NULL;
int fp = fileno(pIndex);
lseek(fp, offset, SEEK_SET);
#ifdef READV
int limit_readv = sysconf(_SC_IOV_MAX);
int blockcnt = (listLength + BLOCKSIZE - 1) / BLOCKSIZE;
int iovcnt = limit_readv, i, index_list = 0;
struct iovec *iov = (struct iovec *)malloc(iovcnt * sizeof(struct iovec));
memset(iov, 0, iovcnt * sizeof(struct iovec));
while (blockcnt > limit_readv)
{
blockcnt -= limit_readv;
for (i = 0; i < iovcnt; ++i)
{
temp->m_index_List = ++index_list;
temp->m_used_int = BLOCKSIZE;
iov[i].iov_base = pMemory + offsetArray[temp->m_index_Global];
iov[i].iov_len = BLOCKSIZE * sizeof(int);
temp = temp->b_next;
}
ssize_t bytes_read = readv(fp, iov, iovcnt);
assert((unsigned int)bytes_read == iovcnt * BLOCKSIZE * sizeof(int));
}
//free(iov);
iovcnt = blockcnt;
iov = (struct iovec *)realloc(iov, iovcnt * sizeof(struct iovec));
for (i = 0; i < iovcnt - 1; ++i)
{
temp->m_index_List = ++index_list;
temp->m_used_int = BLOCKSIZE;
iov[i].iov_base = pMemory + offsetArray[temp->m_index_Global];
iov[i].iov_len = BLOCKSIZE * sizeof(int);
temp = temp->b_next;
listLength -= BLOCKSIZE;
}
temp->m_index_List = ++index_list;
temp->m_used_int = listLength;
iov[i].iov_base = pMemory + offsetArray[temp->m_index_Global];
iov[i].iov_len = temp->m_used_int * sizeof(int);
ssize_t bytes_read = readv(fp, iov, iovcnt);
assert((unsigned int)bytes_read ==
((iovcnt - 1) * BLOCKSIZE + temp->m_used_int) * sizeof(int));
free(iov);
#else
//lseek(fp, offset, SEEK_SET);
unsigned int index_list = 1;
while (listLength > BLOCKSIZE)
{
listLength -= BLOCKSIZE;
temp->m_index_List = index_list++;
temp->m_used_int = BLOCKSIZE;
read(fp, pMemory + offsetArray[temp->m_index_Global], BLOCKSIZE * sizeof(int));
temp = temp->b_next;
}
temp->m_index_List = index_list;
temp->m_used_int = listLength;
read(fp, pMemory + offsetArray[temp->m_index_Global], temp->m_used_int * sizeof(int));
#endif
if (temp != tailFree)
{
temp->b_next->b_prev = headFree;
headFree->b_next = temp->b_next;
}
else
{
tailFree = headFree;
headFree->b_next = NULL;
}
mm_unlock_mutex();
}
void MemoryManager::EvictData(blockunit_t *bnode, int block_num)
{
blockunit_t *startNode = bnode;
blockunit_t *endNode = NULL;
blockunit_t *temp = startNode;
int num = block_num;
while (num-- > 0)
{
endNode = temp;
temp->m_used_int = 0;
temp->m_index_List = 0;
temp = temp->b_next;
}
mm_lock_mutex();
tailFree->b_next = startNode;
startNode->b_prev = tailFree;
endNode->b_next = NULL;
tailFree = endNode;
mm_unlock_mutex();
}
unsigned int MemoryManager::GetPMemory(unsigned long long index)
{
return pMemory[index];
}
unsigned long long MemoryManager::GetOffsetArray(unsigned int index)
{
return offsetArray[index];
}
void MemoryManager::mm_lock_mutex()
{
pthread_mutex_lock(&m_mutex_memory);
}
void MemoryManager::mm_unlock_mutex()
{
pthread_mutex_unlock(&m_mutex_memory);
}