NdbWaiter.hpp
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上传日期:2022-05-23
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- /* 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 */
- #ifndef NDB_WAITER_HPP
- #define NDB_WAITER_HPP
- #include <ndb_global.h>
- #include <NdbOut.hpp>
- #include <NdbError.hpp>
- #include <NdbCondition.h>
- #include <NdbReceiver.hpp>
- #include <NdbOperation.hpp>
- #include <kernel/ndb_limits.h>
- #include <NdbTick.h>
- enum WaitSignalType {
- NO_WAIT = 0,
- WAIT_NODE_FAILURE = 1, // Node failure during wait
- WST_WAIT_TIMEOUT = 2, // Timeout during wait
- WAIT_TC_SEIZE = 3,
- WAIT_TC_RELEASE = 4,
- WAIT_NDB_TAMPER = 5,
- WAIT_SCAN = 6,
- // DICT stuff
- WAIT_GET_TAB_INFO_REQ = 11,
- WAIT_CREATE_TAB_REQ = 12,
- WAIT_DROP_TAB_REQ = 13,
- WAIT_ALTER_TAB_REQ = 14,
- WAIT_CREATE_INDX_REQ = 15,
- WAIT_DROP_INDX_REQ = 16,
- WAIT_LIST_TABLES_CONF = 17
- };
- class NdbWaiter {
- public:
- NdbWaiter();
- ~NdbWaiter();
- void wait(int waitTime);
- void nodeFail(Uint32 node);
- void signal(Uint32 state);
- Uint32 m_node;
- Uint32 m_state;
- void * m_mutex;
- struct NdbCondition * m_condition;
- };
- inline
- void
- NdbWaiter::wait(int waitTime)
- {
- const bool forever = (waitTime == -1);
- const NDB_TICKS maxTime = NdbTick_CurrentMillisecond() + waitTime;
- while (1) {
- if (m_state == NO_WAIT || m_state == WAIT_NODE_FAILURE)
- break;
- if (forever) {
- NdbCondition_Wait(m_condition, (NdbMutex*)m_mutex);
- } else {
- if (waitTime <= 0) {
- m_state = WST_WAIT_TIMEOUT;
- break;
- }
- NdbCondition_WaitTimeout(m_condition, (NdbMutex*)m_mutex, waitTime);
- waitTime = maxTime - NdbTick_CurrentMillisecond();
- }
- }
- }
- inline
- void
- NdbWaiter::nodeFail(Uint32 aNodeId){
- if (m_state != NO_WAIT && m_node == aNodeId){
- m_state = WAIT_NODE_FAILURE;
- NdbCondition_Signal(m_condition);
- }
- }
- inline
- void
- NdbWaiter::signal(Uint32 state){
- m_state = state;
- NdbCondition_Signal(m_condition);
- }
- #endif