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", to print "Receive Query"Client:Send the message "Client query test", "Cleint query", "Client query quit" to the server-side order of address 192.168.100.168, and then exit.The IP address appearing in the topic can be determined according to the actual situation.--This article simply introduces the simple socket programming.More complex needs to go deeper.(Unix domain socket) sending >=128k messages using UDP will report ENOBUFS errors (a problem en

,synchronized's wider function range (synchronization mechanism).3.synchronizedSynchronized keyword is the use of the lock mechanism of Java automatic implementation, there are generally synchronous method and synchronous code block two ways. All objects in Java automatically contain a single lock (also known as a monitor), and when any of its synchronized methods are called on an object, the object is locking (a task can get the lock of the object multiple times, the count is incremented), and

picture for the Open button. In the properties page of the Open button there are image index and large image index two properties, respectively, its small icon in the small icon sequence and its large icon index in the large icon sequence, here we set its icon for the large icon, and for the large icon sequence in the first one, Then directly set the large Image index property to 0, or you can select the icon by clicking on the browse button that appears after selecting the edit box for the la

Source: http://blog.sina.com.cn/s/blog_493520900100bpos.html Question How to reset the AVR via software? Answer if you want to reset the AVR by software, you should use the internal watchdog. Simple to enable it and let it overflow. When the watchdog is triggered, the program counter returns to 0, clearing all registers and other tasks that are being performed, which has the same effect as lowering the reset foot down. You should not handle:

()returnk, Data g_lock.release ()return "', -1def sig_process (SIG, frame):Globalg_exit g_exit=1Print'Catch Signal'def run_thread (num):GlobalG_exitGlobalG_semGlobalG_lock name="'Data= -1 while 0==G_exit:g_sem[num].acquire () whiletrue:name, Data=get_event (name)if "'==Name: BreakG_lock.acquire () print name, Data g_lock.release () def test_thread ():GlobalG_exit while 0==G_exit: forIinchRange -): Add_event ('1', (I 2) +0) add_event ('2', (I 2) +1) add_event ('3', (I 2) +2) add_event ('4',

, the count will increment, and the counter will decrement when the thread exits the synchronization code block. When the count value is 0 o'clock, the lock is released.The re-entry further enhances the encapsulation of the locking behavior, thus simplifying the development of object-oriented concurrency code. The following procedures are analyzed:[Java]View plain copy Public class Father { public synchronized void DoSomething () { ...... } } Public class child extends Fath

with Notifyall. ThreadA1 and ThreadA2 both return from Wait (), wait for an object lock on the list object, and attempt to remove the added element from the listing, which can cause trouble and only one of the operations succeeds. Assuming that threadA1 acquires the object lock on the list and deletes the element successfully, when exiting the synchronized block, it frees the object lock on the list, and ThreadA2 acquires the object lock on the list, and continues to delete the elements in the

V4l_open () function to open the video device, the device file opened successfully using V4l_get_capability () Read device information, Then select the appropriate video capture mode for video capture and processing of the captured image, and finally call the V4l_close () function to close the video device file. There are two kinds of video collection methods, one is read () Direct reading, the other is mmap () memory mapping mode.mmap () modeBy mapping the same file between processes, each pro

code is as follows:Import ("FMT""Strings")Func Main () {Fmt. PRINTLN (Strings. Split ("A,b,c,d,e", ","))//[a b c D E]}5.func Splitafter (S, Sep string) []string, this function is in front of the cut after the completion of the addition of the SEP separatorCopy CodeThe code is as follows:Import ("FMT""Strings")Func Main () {Fmt. PRINTLN (Strings. Splitafter ("A,b,c,d", ","))//[a, B, C, d]}6.func Splitaftern (S, Sep string, n int) []string the function s splits according to Sep, returns the slice

I believe most software developers know the word object-oriented, so it produces object-oriented programming that OO, how to object-oriented how to abstract, how to encapsulate that. Let me use Java to give an example Two stones grind into a stone knife, how to abstract encapsulation. 1, we can easily see a class of stone, think of a stone inside should have a way to become what. At first I think so, but in a careful think of the wrong, if the stone

1. Create Database VOID cdb::createdatabase () {///=====================//Create Login database//=====================　　 Ccedbdatabase MyDB; Check if Database exists if (! Ccedbdatabase::exists (_t ("Test Database"))) {//Create database if it doesn ' T exist already mydb.create (_t ("Test D　　 Atabase "));　　}}//CreateDatabase 2. Open Database Ccedbdatabase MyDB;　　Open Database Mydb.open (_t ("Test Database")); 　　3. Delete database ccedbdatabase MyDB;　　if (Mydb.open (_t ("Test Database"))) Mydb.de