rocketship timer

This article is based on the protocol stack 1.3.2, please respect the originalGeneral Introduction :Osal provides a timer that can function with a callback function, which is implemented mainly in the OSAL_CTIMER.C and osal_cbtimer.h two files. The callback timer is a callback function registered on the basis of the Osal software timer, which executes the pre-reg

One, the existing timer interface Time and space management is the main task of computer system. In time management, we often use the timer to deal with things: such as the TCP protocol in the use of Timer management packet timeout, video display in the use of timers to display video frames regularly, the Web service in the use of timers to manage user timeout. W

"copyright notice: respect for the original, reproduced please retain the source: Blog.csdn.net/shallnet, the article is only for learning exchange, do not use for commercial use " The previous section says that the mechanism of putting the work forward to a time other than the present is the second half, but when you need to postpone the work to a certain period of time, using a timer is a good choice. The last section of kernel time management men

In development we sometimes have the need to perform a task at regular intervals. For example, the controls on the UI need to change over time, we can use Java to provide us with the Timer tool class, that is timer and timertask. A timer is an ordinary class with several important methods, and TimerTask is an abstract class with an abstract method run (), simila

How to use the timer in QTCategory: qt 2005-08-21 12:27 3823 people read reviews (3) Favorites report How to use timers in Qt (1) overload the TimerEvent (Qtimerevent *) function, and then set the time interval in the class's constructor Starttimer (50);//Unit is milliseconds (2) Set the following in the constructor of the class: Qtimer *timer=new Qtimer (this); Connect (

Transferred from: http://www.cnblogs.com/hoys/archive/2011/11/14/2248586.htmlTimers are a necessary part of all operating systems and you will find multiple timer mechanisms. We'll start with a brief introduction to some of the Linux timer patterns, and then delve deeper into how they work.The origin of the (Linux) timeIn the Linux kernel, time is measured by a jiffies global variable called, which identifi

1.Basic usage of TIMERFDThe timers in the 1.1 TIMERFD series are not signals, but are FD-readable, and commonly used functions are timerfd_create, Timerfd_settime, and Timerfd_gettime, The function and use of these functions is also relatively simple, here is a brief example (1.2) to illustrate its usage, the Create parameter clock_realtime is a relative time, when the system time is changed, will be adjusted, there is a parameter clock_monotonic, It is absolute time, changing the system time ha

1 can wait for a timer2 A wait timer is a kernel object that is triggered at a specified time or triggered at intervals. 5 Let's take a look at creating a wait timer function:6 7 HANDLE CreateWaitableTimer (8 lpsecurity_attributes Lptimerattributes,9 BOOL bManualReset,Ten LPCSTR lptimername); One first to third parameter I don't think I need to introduce you. Ha, which is the basic parameters of creating ke

SetInterval Dynamic Change Timer time periodFirst, the goal:SetInterval initial interval is 500ms, dynamic change to 2s/5s/pause.Second, the effect (//gif, if you see a static PNG, you should go to change the computer to see the map. ）Third, realize:JS Control:1 vart=setinterval (change,timer);2 3 functionChange () {4$ (' #t1 '). Click (function(){5timer=2000;6 clearinterval (t);7t=setinterval (change,

Asp.net| Timing In the asp.net use of timers, broken treasure before the blog has written "in asp.net use timer (timer)", here mainly for ASP.net forums to describe its specific implementation. In asp.net forums, the timer is applied as follows:1. Update Forum Statistics2. A post that specifies the number of bars in a timed index3. The mail in the timed mass queu

Create a timer (Nstimer) -(void) viewdidload { [super viewdidload]; [Nstimer scheduledtimerwithtimeinterval:1 target:self selector: @selector (actiontimer:) Userinfo:nil Repeats:yes]; -(void) Actiontimer: (Nstimer *) timer { } Nstimer runs under default mode, which includes almost all input sources (except nsconnection) Nsdefaultrunloopmode modes. The Actiontimer method is called once

The timer component is also a WinForm component, and the biggest difference from the other WinForm components is that the timer component is invisible, and most of the other components are visible and designed. The timer component is also encapsulated in the namespace System.Windows.Forms, and its main function is to trigger the same event every other fixed perio

From: http://blog.163.com/hong_nt/blog/static/10468917120081130103632925/ The main function of the software timer is to implement the timeout mechanism of the state machine and implement the timeout-based counting function.Because the Protocol state machine runs on the Linux kernel, that is, it runs on the user State. InIn Linux, user-Mode Applications can only call three Timers: itimer_real, itimer_virtual, and itimer_prof. In the Protocol state mac

Linux Kernel Timer I. Definition /Include/Linux/Timer. h struct timer_list {struct list_head entry;unsigned long expires;void (*function)(unsigned long);unsigned long data;struct tvec_t_base_s *base;#ifdef CONFIG_TIMER_STATSvoid *start_site;char start_comm[16];int start_pid;#endif};Ii. Functions An instance of the timer_list struct corresponds to a timer. in Linu

Recently completed a J2ME game, always want to write something to everyone ~ because before always in the request, now put J2ME knowledge-timer knowledge and I have a little experience-pay to everyone, content is not much but its use, I hope that the introduction of the J2ME developers help. First of all, the basic use of the timer, the following excerpt from the Nokia Forum in an article: Design Java app

1, only one timer is executed Copy Code code as follows: 2, repeated execution of the timer Copy Code code as follows: Note: If there are two methods on a page that are executed after the page has been loaded and are not actually executed sequentially, you can do so by referring to the following methods: You can add a

kernel timer (2.6.23) First, the definition:/include/linux/timer.h struct Timer_list {struct List_head entry;unsigned long expires;void (*function) (unsigned long);unsigned long data;struct tvec_t_base_s *base;#ifdef Config_timer_s

Python timer usage + get script where absolute path + define log format test codeIf you write a script with a timer in Python, if the script also read the configuration file, then the configuration file path if you write to die, one day to change the directory, you need to change the script configuration file path, and every time the script is located in the path with nohup boot to the background is very tr

The purpose of using a timer is to perform a task periodically, or to perform a task at a specified time. In order to achieve this goal, there are generally two common and more effective methods. One is using the three timer inside Linux, and the other is sleeping or usleep the process to sleep for a while; in fact, there is another way, it is to use Gettimeofday, difftime and so on themselves to calculate

Tags: general timer simple RES global variable variable set real-time task jiffiesa clock interrupt is generated by the system's timing hardware at periodic intervals (1/hz seconds), this interval (frequency) is determined by Hz, which is a hardware independent constant, configurable (50-1200), on the X86 platform, the default is 1000Whenever a clock interrupt occurs, the global variable jiffies + 1, so Jiffies records the number of clock interrupts s