multimap <string, struct>使用范例

来源：互联网发布：windows同步时间超时编辑：程序博客网时间：2024/05/20 18:55

头文件：#include <map>

声明和定义相关：

typedef struct tag_ALARM_INFO
    {
        __UINT32 dwAlarmSeq;      //流水号
        __UINT32 dwCreatedTime;   //创建的时间
    }ALARM_INFO;

typedef multimap < CString,ALARM_INFO > Alarm_mutimap;
typedef multimap < CString,ALARM_INFO >::iterator Alarm_mutimap_it;
typedef multimap < CString,ALARM_INFO >::size_type Alarm_mutimap_sz;

Alarm_mutimap m_mapIPToAlertInfo;

添加：

ALARM_INFO pAlarmInfo ;
pAlarmInfo.dwAlarmSeq = dwAlarmSeq;
pAlarmInfo.dwCreatedTime = INFOX_GetTickCount();//当前时间
m_mapIPToAlertInfo.insert(multimap< CString,ALARM_INFO >::value_type((CString)lpszClientIP,(ALARM_INFO)pAlarmInfo));

查找：

Alarm_mutimap_sz icount = m_mapIPToAlertInfo.count((CString)lpszClientIP);

if(0 == icount)

{return;}

multimap < CString,ALARM_INFO>::const_iterator itAlarminfo = m_mapIPToAlertInfo.lower_bound((CString)lpszClientIP);
if (itAlarminfo != m_mapIPToAlertInfo.end())
{
dwAlarmSeq = itAlarminfo->second.dwAlarmSeq;
}

删除：

Alarm_mutimap_sz icount = m_mapIPToAlertInfo.count((CString)lpszClientIP);
if (0 != icount)
{
  Alarm_mutimap_it itAlarminfo = m_mapIPToAlertInfo.lower_bound((CString)lpszClientIP);
  if (itAlarminfo != m_mapIPToAlertInfo.end())
  {
   TRACE("delete %d",itAlarminfo->second.dwAlarmSeq);
   m_mapIPToAlertInfo.erase(itAlarminfo);
  }
}

清除超时：

__UINT32 dwCurrentTime = INFOX_GetTickCount();//当前时间
ALARM_INFO pAlarmInfo ;

Alarm_mutimap_it itAlarmInfo = m_mapIPToAlertInfo.begin();
for (;m_mapIPToAlertInfo.end() != itAlarmInfo;itAlarmInfo++)
{
  pAlarmInfo =itAlarmInfo->second;
  if ( (dwCurrentTime - pAlarmInfo.dwCreatedTime) >= dwMaxLife)
  {
   m_mapIPToAlertInfo.erase(itAlarmInfo);
   dwDeleteNum++;
   itAlarmInfo = m_mapIPToAlertInfo.begin();
  }
}