linux 定时器变成方案

昨日做android的时候发现android对RT模式的定时竟然支持的程度不太好，反而对setitimer形式的定时器反应正常，怪哉。

 

把以前的相关代码部分整理一下。

 

linux下使用定时器方案1： 使用setitimer。

 

//信号菌柄

void ProgSig_ALRM(int signo)
{
}

 

//注册信号句柄
void RegSigHandle()
{
 sigset_t block_mask;

 //屏蔽所有不用的信号
 sigfillset(&block_mask);
 sigdelset(&block_mask, SIGALRM);
 sigprocmask(SIG_BLOCK, &block_mask, NULL);

 //type 1
 sigset(SIG_LOWBATTERY, ProgSig_LOWBATTERY);
 sigset(SIG_SOFTPOWEROFF, ProgSig_SOFTPOWEROFF); 
 sigset(SIG_BATTERYOK, ProgSig_BatteryOK);
 sigset(SIGCHLD, SIG_IGN);
 //type 2
 signal(SIG_EXITRUN, ProgSig_ExitRun);
 //type3
 //sigaction 
 struct sigaction sigact;
 sigfillset(&sigact.sa_mask);
 sigact.sa_handler=ProgSig_ALRM;
 sigaction(SIGALRM, &sigact, NULL);
}

 

//创建相应的定时器
void MakeTimer()
{
 //only one timer
 struct itimerval itimer;
 itimer.it_interval.tv_sec = 3;
 itimer.it_interval.tv_usec = 0;
 itimer.it_value.tv_sec = 3;
 itimer.it_value.tv_usec = 0;
 setitimer(ITIMER_REAL, &itimer, NULL);

}

 

 

linux下使用定时器方案2： 使用timer_create.

 

static timer_t time_watch;
static bool timerValid=false;

 

static void DO_WatchTimer(sigval_t sig);

void StopLocalPageTime()
{
 if (timerValid)
 {
  timer_delete(time_watch);
 }
 timerValid = false;
}

void StartLocalPageTimer(int mSec, HWND hwnd)
{
 struct sigevent timer_event;
 struct itimerspec timer;

 timer.it_interval.tv_sec = mSec/1000;
 timer.it_interval.tv_nsec = mSec%1000;
 timer.it_value = timer.it_interval;

 timer_event.sigev_notify = SIGEV_THREAD;
 timer_event._sigev_un._sigev_thread._function = DO_WatchTimer;
 timer_event._sigev_un._sigev_thread._attribute = NULL;
 timer_event.sigev_value.sival_ptr = (void *)&time_watch;

 timerValid = false;
 if (timer_create (CLOCK_REALTIME, &timer_event, &time_watch) < 0)
 {
  _DEBUG("StartLocalPageTimer: timer_create failed. \r\n", NULL);
  return ;
 }

 if (timer_settime (time_watch, 0, &timer, NULL) < 0)
 {
  _DEBUG("StartLocalPageTimer: timer_settime failed. \r\n", NULL);
  return ;
 }
 timerValid = true;
}

 

linux下使用定时器方案3： 使用alarm();