The Linux Programming Interface: a linux and unix system Programming Handbook
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TIMERS AND SLEEPING 479 23.1 Interval Timers........................................................................................................... 479 23.2 Scheduling and Accuracy of Timers ............................................................................. 485 23.3 Setting Timeouts on Blocking Operations ...................................................................... 486 23.4 Suspending Execution for a Fixed Interval (Sleeping) ..................................................... 487 23.4.1 Low-Resolution Sleeping: sleep() .............................................................. 487 23.4.2 High-Resolution Sleeping: nanosleep() ...................................................... 488 23.5 POSIX Clocks............................................................................................................ 491 23.5.1 Retrieving the Value of a Clock: clock_gettime() ........................................ 491 23.5.2 Setting the Value of a Clock: clock_settime() ............................................. 492 23.5.3 Obtaining the Clock ID of a Specific Process or Thread ............................. 493 23.5.4 Improved High-Resolution Sleeping: clock_nanosleep() ............................... 493 23.6 POSIX Interval Timers................................................................................................. 495 23.6.1 Creating a Timer: timer_create() ............................................................. 495 23.6.2 Arming and Disarming a Timer: timer_settime() ........................................ 498 23.6.3 Retrieving the Current Value of a Timer: timer_gettime() ............................. 499 23.6.4 Deleting a Timer: timer_delete() .............................................................. 499 23.6.5 Notification via a Signal........................................................................ 499 23.6.6 Timer Overruns..................................................................................... 503 23.6.7 Notification via a Thread ....................................................................... 504 23.7 Timers That Notify via File Descriptors: the timerfd API ................................................... 507 23.8 Summary.................................................................................................................. 511 23.9 Exercises .................................................................................................................. 512 tải về 6.93 Mb. Chia sẻ với bạn bè của bạn:
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