synchronization

问题 The class BrokenLinkTest in the code below does the following. takes a web page url finds all the links in the web page get the headers of the links concurrently (this is done to check if the link is broken or not) print 'completed' when all the headers are received. from bs4 import BeautifulSoup import requests class BrokenLinkTest(object): def __init__(self, url): self.url = url self.thread_count = 0 self.lock = threading.Lock() def execute(self): soup = BeautifulSoup(requests.get(self.url)

问题 I'm building my first App and simple game similar to MasterMind with numbers. I would that when the pc try to find my number, don't show immediately all the attempts that he does before finding the correct number, but that he does it gradually. For example the CPU say the first number, wait one second and then say the second number and so on. Here is the code: public void startCPU() { int num; int strike; int xx; do { do { Random random = new Random(); num = random.nextInt((9876 - 123) + 1) +

问题 If I have a process which creates N threads; namely T1 .... Tn. Assume that N threads are using a lock L to synchronize among themselves. If this process calls fork() The new child process created has N threads or just 1 thread ? From this question, looks like its just 1 thread The lock L is copied to new memory (physical) location with the same value, right ? If answer to question (1) is that only 1 thread gets copied, what happens in new process if T1 had locked L and fork() is called from

问题 I need somebody to point me to the right direction, I have a MS Access DB that is updated by HP devices, and I have to sync it with the SQL Server 2008. I have a few Ideas, and I would like to know what do you think about this: Is there anything like triggers on access? if so can I comunicate with a SQL Server? Is there any way to use VBA so access tell my VBA macro or whatever to make an update on SQL Server? Is there a simple way to connect from VB 6 to SQL Server 2008? Using a script that

问题 I was reading book "java concurrency in practice" and end up with some doubts after few pages. 1) Voltile with non premitive data types : private volatile Student s; what is significance of volatile when it comes with non premitive data types ? (I think in this case only think that is sure to be visible to all threads is what Strudent object s is pointing currently and it is possible one thread A modifies some internal member of student and that is not visible to other threads. Am I right ??)

问题 I recently read a book about OpenCL and queue synchronizing methods, but I didn't understand difference between using clEnqueueMarkerWithWaitList and clWaitforEvents. For example, in the below example, The kernel_2 instance's execution is dependent on writing of two buffers clmem_A and clmem_B to the device. I don't understand what is the difference when we delete the clEnqueueMarkerWithWaitList command and change the argument of clwaitforEvents to write_event. cl_event write_event[2];

问题 Despite my best efforts, I am unable to produce the kind of synchronization effects I would like to in ActionScript. The issue is that I need to make several external calls to get various pieces of outside information in response to a user request, and the way items will be laid out on the page is dependent on what each of these external calls returns. So, I don't care that all of these calls return asynchronously. However, is there any way to force some amount of synchronization on

问题 I have a thread(WRITER) that continuously populates a buffer(a vector in my case) as the incoming data arrive. And i have another thread(READER) that periodically checks the buffer for incoming data and clears the buffer after processing data is done. Once I saw an implementation that suggested to have two buffers (A and B) instead. the WRITER writes into buffer A, and when it is the time for reading the data, the READER takes over buffer A and WRITER starts reading into B...and this flipping

问题 Is there anyway to lock on the object equality instead of referential equality in Scala/Java e.g. def run[A](id: A) = id.synchronized { println(s"Processing $id") Thread.sleep(5000) println(s"Done processing $id") } Seq(1, 1, 2, 3, 1).par.foreach(run) I want this to print something like: Processing 3 Processing 1 Processing 2 // 5 seconds later Done processing 1 Done processing 2 Done processing 3 Processing 1 // 5 seconds later Done processing 1 Processing 1 // 5 seconds later Done

问题 I have a problem with setting slick carousel in mode with sync navigation, to work like this: First transition https://imgur.com/a/Lq1nn Second transition https://imgur.com/a/ywL3D Third transition https://imgur.com/a/SbBbf The way I am doing it now, does not working as it should. $main_topic_slider.on('beforeChange', function(currentSlide){ $main_topic_nav.slick('slickGoTo', currentSlide + 1); console.log('SLIDER:'+$main_topic_slider.slick('slickCurrentSlide')); console.log('NAV:'+$main