sleep

问题 I was wondering if anyone knew of a better sleep function that could be used in windows in c, other than Sleep(), which takes a millisecond input and only guarantees that the input is the minimum amount of time that elapses. I am passing in 1 millisecond, but actually getting a 15-16 millisecond delay. Is there any way to accurately set a specified sleep time? 回答1: No, not really. When you tell your program to sleep, you're giving up the processor and letting the operating system decide what

问题 I have an app, listening for the *.log file in a chosen folder. I used FileSystemWatcher . But there is a problem. The other app responsible for making that file takes following steps: Make a *.gz file Unpack it to txt file (some random file name) Change the *.txt name to proper one with *.log extension. And I can not change this behaviour. So I made 2 FileSystemWatcher s for *.gz, and *.txt files. Why? Because this app sometimes doesn't unpack the gz file, and sometimes doesn't rename the

问题 I'm working on a project involving the sleep() command, (running 2.7.2) and it's throwing errors that I've never seen before. Here's a test script I wrote: from time import sleep print '1' sleep(2) print '2' It returns: >> 1 >> Internal error: ReferenceError: _select is not defined Any help is appreciated 回答1: time.sleep() uses select if it is available. For some reason HAVE_SELECT was defined when your Python was built, but now the library can't be found. From the docs ... On the other hand,

问题 I am looking for a way to pause the for loop below when the user presses [spacebar] and then continue the loop from the most recent iteration when [spacebar] is pressed again. Currently, the script prompts the user for three values and then prints words from a text file at timed intervals until there are no words remaining. What would be the best way to go about this? Thanks very much. import time with open('Textfile.txt', 'r', encoding='utf8') as file: data = file.read() data2 = data.split()

问题 Where can I find the code for wait_event_interruptible in Kernel tree. What I can find is wait_event_interruptible is defined as __wait_event_interruptible in . But I am unable to find the code . Please help me out. Consider a process which has gone to sleep by wait_event_interruptible. Suppose if there is an interrupt now and the interrupt handler wakes(wake_up_event_interruptible) up the sleeping process. For the process to wake up successfully should the condition given in wait_event

问题 I'm calling a web service via GET protocol and the response will either be echoed out on the page as true or false. I'm trying to write logic that will retry up to 3 times if the web service returns false. However, the first time I want to wait 1 second, the second time I want to wait 10 seconds, and the third time I want to wait 60 seconds. This is what I currently have. Is there a better way to achieve this? if ($wsReturn == 'false') { sleep(1); $wsReturn = strip_tags(file_get_contents(

问题 I have a python script that is running in the background with pythonw. If I close my laptop, it goes into sleep mode. and when I open my laptop, my program has little functionality and freezes after a couple of seconds. Is there any way that my script can tell if my computer is going into sleep mode, so that it can lie dormant and restart when I re-open my laptop? 回答1: You can catch WM_POWERBROADCAST window message with PBT_APMQUERYSUSPEND event inside it. To catch this message inside Python

问题 I have the following use case: My current thread needs to do operation1 , waits some amount of time to coordinate with others and afterwards needs to do operation2 . In between the waiting, APCs might need to be processed by that thread because of file system events, which add another operation1 to some queue to be processed later after operation2 is finished by the current thread. Something simple like the following: while (true) { processOperation1; SleepEx(..., true); processOperation2; }

问题 The windows form I am working on subscribes to Microsoft.Win32.SystemEvents.PowerModeChanged and on Suspend it runs the Close() method on the form. On Resume it runs the Run() function like it would on initial load. The problem is that when the computer is woken from sleep mode the PowerModeChanged event is triggered on a worker thread named ".Net SystemEvents" and when Run() is called it recreates the form on this worker thread instead of the main thread. This form is a project I inherited

问题 I was checking out clock() on cplusplus.com. Their example involves making the process wait for a second and then output a line, in a loop until 10 seconds have ellapsed. I need to do something similar in the homework assignment I'm working on. What I was wondering was this: if I just send my program into a loop, isn't that using system resources to just spin me around? In this case, wouldn't a system call be better? Thanks for your help! 回答1: Yes, using a system call or library function like