unlocks iphones

is often used in conjunction with mutexes. When used, a condition variable is used to block a thread, and when the condition is not met, the thread often unlocks the corresponding mutex and waits for the condition to change. Once another thread changes the condition variable, it notifies the corresponding condition variable to wake one or more threads that are being blocked by this condition variable. These threads will re-lock the mutex and re-test

the game, all game levels (except level 1) were locked. Each time a player completes a level, it unlocks all players on the device. The leveltracker struct uses static attributes and methods to monitor which level of the game has been unlocked. It also monitors the current level of each player. struct LevelTracker { static var highestUnlockedLevel = 1 static func unlockLevel(level: Int) { if level > highestUnlockedLevel { highestUnlockedLevel = l

. Why should we unlock it, think about it. If you don't unlock it, there will be no external permission to modify X and Y. If you want to modify these two values for the other two threads, You need to lock qclock. After thread 1 is ready, thread 2 will be run. Let's look at the thread function of thread 2. The function is also locked at the beginning, but when pthread_cond_wait of thread 1 is unlocked, it can continue to run, and, after that, it modifies X and Y,

unpackage, tar provides a special feature. This means that tar can call other compression programs, such as gzip and bzip2, while packaging or unpacking.1) tar calls gzip Gzipis a program developed by gnuorganization. The file ending with .gz is the result of gzip compression. The decompress program relative to gzip is gunzip. Use the-z parameter in tar to call gzip. The following is an example:# Tar-czf all.tar.gz *. jpgBytes# Tar-xzf all.tar.gzThis command

variables make up for the lack of mutex lock by allowing the thread to block and wait for another thread to send signals. They are often used together with mutex locks. When a condition variable is used to block a thread, when the condition is not met, the thread often unlocks the corresponding mutex and waits for the condition to change. Once another thread changes the condition variable, it will notify the corresponding condition variable to wake u

command are as follows: -D. Delete the password;-L lock the account;-S: List password-related information;-U unlocks the locked account;[User name] the user account for which the password is to be set. If no password is specified, the current user's password is set. CalDisplay a simple calendar. Syntax: cal [-mjy] [[mouth] year] The options of this command are as follows: -M indicates Monday as the first day of each week. The default value is Sunday;

used to extract all files in the all.tar package.-X is used to unlock the file. The above is the most basic usage of tar. To help you compress or decompress files while packing and unpackage, tar provides a special feature. This means that tar can call other compression programs, such as gzip and Bzip2, while packaging or unpacking. 1) tar calls Gzip Gzipis a program developed by gnuorganization. The file ending with .gz is the result of gzip compression. The decompress program relative to gzip

command adds all .gif files to the package of all.tar. -R indicates adding files.# Tar-UF all.tar logo.gifThis command is used to update the logo.gif file in tarbao all.tar.-u indicates that the file is updated.# Tar-TF all.tarThis command is used to list all files in the all.tar package.-T is used to list objects.# Tar-XF all.tarThis command is used to extract all the files in the all.tar package.The above is the most basic usage of tar. To help you compress or decompress files while packing a

compression programs while packaging or unpacking, For example, gzip and Bzip2 are called.1) tar calls GzipGzipis a program developed by gnuorganization. The file ending with .gz is the result of gzip compression. The decompress program relative to gzip is gunzip. Use the-Z parameter in tar to call gzip. The following is an example:# Tar-CZF all.tar.gz *. jpgThis command is to compress all .jpg files into a tar package and use gzip to generate a gzip compressed package, The package name is all.

variable value into the register. 2. Increase or decrease the value in the register. 3. Write the value in the register back to the memory. If thread a and thread B load the old value of the variable at the same time, add value in the register and write back. Their write operations overlap, resulting in only one increase in the variable value. Obviously, access should be serialized: A should not be interrupted when performing step 123. The simplest way to make this class thread-safe is to use q

1. Pack all. jpg files into a package named all.tar: tar-CF all.tar *. jpg;-C indicates that a new package is generated, and-F specifies the package file name. Add all .gif files to the package of all.tar: tar-RF all.tar *. gif;-r indicates adding files. Update the original logo.gif file in tarbao all.tar: tar-UF all.tar logo.gif;-u indicates the file to be updated. List all files in the all.tar package: tar-TF all.tar;-T indicates listing files. Extract all files in the all.tar package: tar-XF

Tar instructions for Aix1. Pack all. jpg files into a package named all.tar: tar-CF all.tar *. jpg;-C indicates that a new package is generated, and-F specifies the package file name.Add all .gif files to the package of all.tar: tar-RF all.tar *. gif;-r indicates adding files. Update the original logo.gif file in tarbao all.tar: tar-UF all.tar logo.gif;-u indicates the file to be updated. List all files in the all.tar package: tar-TF all.tar;-T indicates listing files. Extract all files in the a

is the most basic usage of tar. To help you compress or decompress files while packing and unpackage, tar provides a special feature. This means that tar can call other compression programs, such as gzip and Bzip2, while packaging or unpacking. 1) tar calls Gzip Gzipis a program developed by gnuorganization. The file ending with .gz is the result of gzip compression. The decompress program relative to gzip is gunzip. Use the-Z parameter in tar to call gzip. The following is an example: # Tar-CZ

Introduction to mutex Mutex can protect some code from running only one thread. If a thread uses mutex to execute some code, other threads will be blocked until the thread finishes executing the code. A thread locks the mutex before accessing shared data. Other threads lock the mutex until the thread unlocks the mutex. Mutex is the most common data protection mechanism in C ++, but it is not omnipotent. When writing code, it is very important to

often unlocks the corresponding mutex and waits for the condition to change. Once another thread changes the condition variable, it will notify the corresponding condition variable to wake up one or more threads that are blocked by this condition variable. These threads will re-lock the mutex and re-test whether the conditions are met. In general, condition variables are used for line-to-line synchronization.The condition variable structure is pthrea

gunzip. Use the-Z parameter in tar to call gzip. The following is an example:# Tar-CZF all.tar.gz *. jpgBytes# Tar-xzf all.tar.gzThis command unlocks the generated package.2) tar call Bzip2Bzip2is a more powerful compression program. The file ending with .bz2 is the result of Bzip2 compression. The decompress program relative to Bzip2 is bunzip2. Use the-J parameter in tar to call gzip. The following is an example:# Tar-CJF all.tar.bz2 *. jpgBytes# T

pipelines and control Unicode file names without the restriction of path names with 128 characters)Readfile reads data from the file. Compared with the lread function, this function is much more flexible. This function can operateCommunication devices, pipelines, sockets, and mail SlotsReadfileex is similar to readfile, but it can only be used for asynchronous read operations and contains a complete callback.SearchpathSetendoffile sets the current file location to the end of the file for an ope

feature. This means that tar can call other compression programs, such as gzip and Bzip2, while packaging or unpacking.1) tar calls GzipGzipis a program developed by gnuorganization. The file ending with .gz is the result of gzip compression. The decompress program relative to gzip is gunzip. Use the-Z parameter in tar to call gzip. The following is an example:# Tar-CZF all.tar.gz *. jpgBytes# Tar-xzf all.tar.gzThis command unlocks the generated pack

the most basic usage of tar. To help you compress or decompress the packageFile, tar provides a special feature. This means that tar can call other pressures while packaging or unpacking.Program shrinking, such as calling gzip and Bzip2. 1) tar calls Gzip Gzipis a program developed by gnuorganization. The file ending with .gz is the result of gzip compression. And GzipThe relative decompression program is gunzip. Use the-Z parameter in tar to call gzip. The following is an example.: # Tar-CZF a

Tar 1) tar calls GzipGzipis a program developed by gnuorganization. The file ending with .gz is the result of gzip compression. And GzipThe relative decompression program is gunzip. Use the-Z parameter in tar to call gzip. The following is an example.:# Tar-CZF all.tar.gz *. jpgThis command is to compress all .jpg files into a tar package and use gzip to generateThe package name is all.tar.gz.# Tar-xzf all.tar.gzThis command unlocks the generated pack