function lock

What is a micro-letter sound lock? iOS version of the micro-letter users upgrade to the latest version, you need to open the function in the settings, and then according to the system requirements to read out random numbers several times, then the micro-letter will get your voice feature parameters, and finally the user out of the micro-letter. When you log on again, the user simply reads the correspondi

The applet implements the gesture pattern lock function and gesture lock screen function. Examples of this article share the code for the screen lock of the gesture pattern of the applet for your reference. The details are as follows: Reference H5lock WXML JS Var Locker =

1. In the Samsung mobile phone C5 standby page, click the "Settings" option, the effect shown in the following figure. 2. Then in the open into the interface we click on the "Privacy and security" option, the effect is as follows. 3. Then, after entering, we click on the "Apply lock" option. 4. Click on the right "slider" switch. 5. Select an application lock type as need

For the write lock function of mysql transaction row lock forupdate, in e-commerce, there are often fewer inventory and a large number of buyers, in the case of high concurrency, how can we ensure that the number of items will not be purchased multiple times. In fact, it is very simple to use the transaction + for update to solve. We all know that for update

In e-commerce, there is often a small inventory and a large number of buyers. In the case of high concurrency, how can we ensure that the number of products will not be bought multiple times. In fact, it is very simple to use the transaction + for update to solve. We all know that for update is actually a shared lock and can be read. But how can we not read it during execution. To put it simply, assume that the inventory is 1 now and A and B are av

In E-commerce, there will often be a small number of inventory, the purchase of the person is particularly large, concurrency in the case of how to ensure that the number of goods will not be purchased multiple times. In fact very simple, use the transaction +for update can be solved. We all know that for update is actually a shared lock that can be read. But how to execute it without being read. To put it simply: Assuming inventory is now 1, now t

Int pthread_rwlock_init (pthread_rwlock_t * rwlock, \ const pthread_rwlockattr_t * ATTR ); Returned value: 0 is returned if the function is successful. Any other returned values indicate an error. Initializes the read/write lock specified by rwlock. Its attribute is specified by the ATTR parameter. If the ATTR value is null, the default read/write lock attribut

. Therefore, a recursive procedure using a spin lock should follow the following principles: a recursive program must not call itself when holding a spin lock, nor can it attempt to acquire the same spin lock when recursive calls are made. 2. Blocking lock Let the thread into the blocking state to wait, when the corr

One, what is file lockFor the word lock, we must not be unfamiliar, because we live in a large number of locks, they play its role in all aspects of the world, now the function of the lock can be summed up as a sentence, is to prevent some people do something, for example, the door lock is to prevent people other than

Records lock record Locking Function: When a process is reading or modifying a part of a file, it can prevent other processes from modifying the same file area. BYTE range lock Byte-range locking Second, history Flock function, you can lock the entire file, you cannot

screen, how to turn it off? Some predecessors suggested this approach. Keyguardmanager km = (keyguardmanager) getsystemservice (context.keyguard_service); Keyguardmanager.keyguardlock Keyguardlock = Km.newkeyguardlock (""); Keyguardlock.disablekeyguard (); Requires permissions But after the author test, this method can only disable the sliding lock, if the user is set a pattern or pin l