77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
/**
|
|
* Copyright (c) 2021 OceanBase
|
|
* OceanBase CE is licensed under Mulan PubL v2.
|
|
* You can use this software according to the terms and conditions of the Mulan PubL v2.
|
|
* You may obtain a copy of Mulan PubL v2 at:
|
|
* http://license.coscl.org.cn/MulanPubL-2.0
|
|
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
|
|
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
|
|
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
|
|
* See the Mulan PubL v2 for more details.
|
|
*/
|
|
|
|
#define USING_LOG_PREFIX SQL_PC
|
|
#include "ob_plan_cache_callback.h"
|
|
#include "sql/plan_cache/ob_plan_cache_value.h"
|
|
#include "sql/plan_cache/ob_plan_cache.h"
|
|
|
|
using namespace oceanbase;
|
|
using namespace oceanbase::sql;
|
|
using namespace oceanbase::common;
|
|
|
|
void ObLibCacheAtomicOp::operator()(LibCacheKV &entry)
|
|
{
|
|
if (NULL != entry.second) {
|
|
entry.second->inc_ref_count(ref_handle_);
|
|
cache_node_ = entry.second;
|
|
SQL_PC_LOG(DEBUG, "succ to get cache_node", "ref_count", cache_node_->get_ref_count());
|
|
} else {
|
|
// if no cache node found, no need to do anything now
|
|
}
|
|
}
|
|
|
|
//get cache node and lock
|
|
int ObLibCacheAtomicOp::get_value(ObILibCacheNode *&cache_node)
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
cache_node = NULL;
|
|
if (OB_ISNULL(cache_node_)) {
|
|
ret = OB_NOT_INIT;
|
|
SQL_PC_LOG(WARN, "invalid argument", K(cache_node_));
|
|
} else if (OB_SUCC(lock(*cache_node_))) {
|
|
cache_node = cache_node_;
|
|
} else {
|
|
if (NULL != cache_node_) {
|
|
cache_node_->dec_ref_count(ref_handle_);
|
|
}
|
|
SQL_PC_LOG(DEBUG, "failed to get read lock of lib cache value", K(ret));
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
worker thread: | evict thread
|
|
| get all plan id array(contains plan id x)
|
|
deleting .... remove plan id x |
|
|
from map |
|
|
dec ref cnt => ref_cnt=0 |
|
|
| ref plan id x. inc_ref=1
|
|
deleting plan x |
|
|
| access plan x --> cause core!
|
|
*/
|
|
|
|
void ObCacheObjAtomicOp::operator()(ObjKV &entry)
|
|
{
|
|
if (NULL != entry.second) {
|
|
int64_t ref_cnt = entry.second->inc_ref_count(ref_handle_);
|
|
if (ref_cnt > 1) {
|
|
cache_obj_ = entry.second;
|
|
} else {
|
|
cache_obj_ = nullptr;
|
|
}
|
|
SQL_PC_LOG(DEBUG, "succ to get plan");
|
|
} else {
|
|
// do nothing
|
|
}
|
|
}
|