wait_event函数用于使当前线程进入休眠等待状态。 #define wait_event(wq, condition) do { if (condition) //判断条件是否满足,如果满足则退出等待 break; __wait_event(wq, condition);//如果不满足,则进入__wait_event宏 } while (0) #define __wait_event(wq, condition) do { DEFINE_WAIT(__wait)...
1. 为了使得等待进程在一个等待队列中睡眠,需要调用函数wait_event()函数。进程进入睡眠,将控制权释放给调度器。 2. 在内核中另一处,调用wake_up()函数唤醒等待队列中的睡眠进程。 注:使用wait_event()函数使得进程睡眠;而在内核另一处有一个对应的wake_up()函数被调用。 (二)初始化等待队列元素 有两种方法...
当___wait_cond_timeout返回0时,进入494行的主逻辑(main routine)__wait_event_interruptible_timeout中,定义如下。 <include/linux/wait.h> 464 #define __wait_event_interruptible_timeout(wq_head, condition, timeout) \ 465 ___wait_event(wq_head, ___wait_cond_timeout(condition), \ 466 TASK_...
wait_event_interruptible #definewait_event_interruptible(wq, condition) \({ \int__ret =0; \if(!(condition)) \ __wait_event_interruptible(wq, condition, __ret); \ __ret; \ }) 调用该宏首先会先检查条件,如果条件已经满足,则不用等了呀,返回吧……,否则调用__wait_event_interruptible #defin...
wait_event_interruptible_timeout 该函数和前面类似,但是增加了等待时间,还是简单看下__wait_event_interruptible_timeout的for循环 for(;;) { \ prepare_to_wait(&wq, &__wait, TASK_INTERRUPTIBLE); \if(condition) \break; \if(!signal_pending(current)) { \ ...
The Wait-Event cmdlet suspends execution of a script or function until a particular event is raised. Execution resumes when the event is detected. To cancel the wait, press CTRL+C. This feature provides an alternative to polling for an event. It also all
看Linux 的 wait_event 源码时,联想到我们平时经常用得比较多的 wait/notify、double-check 和 volatile,突然意识 wait_...
select wait_event_type,wait_event,state,query,a.* from pg_stat_activity a where query like 'insert%'; 1. wait_event_type|wait_event|state |query |datid |datname|pid |leader_pid|usesysid|usename|application_name |client_addr |client_hostname|client_port|backend_start |xact_start |query...
Activity to invoke the Microsoft.PowerShell.Utility\Wait-Event command in a Workflow. C++複製 publicrefclassWaitEventsealed:Microsoft::PowerShell::Activities::PSRemotingActivity Constructors 展開表格 WaitEvent() Gets the display name of the command invoked by this activity. ...
在下文中一共展示了EventQueue::waitEvent方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。 示例1: callTask ▲点赞 7▼ voidcallTask(std::stringtask_address,constCallContext& call_ctx, EventQueue&queue){cout<<" TA...