mutex object

1. MFC ApplicationProgramThere are two types of threads in: User Interface thread and worker thread. User Interface threads can generate their own windows and process related window messages. They have separate message queues that can respond to

BackgroundWhen writing windows desktop applications, we can open multiple application instances without special processing. For example, if you open multiple QQ programs on the same machine, you can also open multiple browser windows. However, some

Lock's purpose is clear: just don't want someone else to use this code, in the case of multithreading, only allow the current thread to execute the code area, other threads wait until the thread execution ends, so that multithreading avoids the

Some resources in the operating system can not be accessed directly by user code, such as thread processes, files, etc., these resources must be entered into the RING0 layer by the system-level code from the RING3 layer, and return some identity for

The lock keyword can be used to ensure that a block of code finishes running without being interrupted by another thread. It can define a piece of code as a mutex (critical section), where the mutex only allows one thread to go into execution at a

One, lock definitionThe lock keyword can be used to ensure that a block of code finishes running without being interrupted by another thread. It can define a piece of code as a mutex (critical section), where the mutex only allows one thread to go

Ext.: http://kb.cnblogs.com/page/211181/Perhaps, just this article, you can give you a comprehensive understanding of the operating system!Before reading this article, it is recommended to read "Make your own 4-bit computer". Directory: 1.

"Mutex" is the abbreviated form of the term "mutually exclusive (mutually exclusive)", which is the mutex amount. When two or more threads need to access a shared resource at the same time, the system needs to use a synchronization mechanism to

The first thing to note is that declaring the method declared in the object class is a feature that every Java class should have, because it is well known that object is the originator of all Java classes, so what are the three methods in object?

Lock_guard: A more flexible lock management class template, which is optional when the lock is constructed, and the ownership can be transferred if the lock is automatically released when the object is refactored. Manual lock and release locks are

Article Directory 1 Memory optimization 1.1 Small objects merged into a struct once allocated, reducing memory allocation times 1.2 Buffer content Allocate enough space at a time and reuse it appropriately 1.3 Slice and map

1 kernel Object definition:1.1: Each Kernel object is just a block of memory allocated by the kernel and can only be accessed by that kernel.1.2: the memory block is a data structure whose members are responsible for maintaining various information

I. Mutual exclusionA mutex object facilitates protection against data races and allows safe synchronization of data between execution agents (30.2.5).Mutually exclusive objects help prevent data contention, allow secure synchronization between data

The use of mutex objects in 1.uc/os-ii should be notedThe mutex object (Mutual exclusion Semaphore), referred to as a mutex, is one of the kernel objects of UC/OS-II, which manages resources that require exclusive access and adapts it to a

2.3 concurrency Concurrency is a term that involves a series of policies and mechanisms that enable one or more threads or processes to simultaneously execute their service processing tasks. Many network applicationsProgramIn particular, servers

I published my article "How to start only one instance" and was recommended to the csdn homepage. Many netizens have read this article and made some good suggestions. One of the netizens said they could use the shared variable method. I collected

Transferred from: http://www.cnblogs.com/memewry/archive/2012/08/22/2651696.htmlOne, process/thread synchronization mechanism.Four ways of critical, mutex, event, SemaphoreDifferences between critical sections (Critical section), mutexes (mutexes),

Title: Sub-thread loop 10 times, then the main thread loop 100 times, then back to the child thread loop 10 times, and then back to the main thread and loop 100 times, so Loop 50 times, try to write codeThe child thread and the main thread must have

4. Deep copy and shallow copy(1) When will the copy function be used?An object is passed into the function as a value (that is, as an input parameter)An object is returned from the function as a value (that is, as a return value)An object needs to

I. Introduction With AJAX technology, a browser page can send data requests to the server in the background while the front-end user interfaces remain active. This leads to a typical problem-the previous two activities simultaneously access common