mutex object

Add the following to the winmain function in the project file: Code (This code runs in bcb6.0 ): Handle hmutex = createmutex (null, false, "process "); If (getlasterror () = error_already_exists) { Closehandle (hmutex ); MessageBox (Application->

In Windows, the program prevents multiple common methods:1) Use the findwindow API function.Locate the window title (or/and class name)ProgramWhether it is running. If it is found, it indicates that the program is running, and you can exit the

HANDLE CreateThread (lpsecurity_attributes lpthreadattributes,//SD: Thread-safe-related properties, normally nullsize_t Dwstacksize,//initialstacksize: The size of the initialization stack for the new thread, which can be set to

Multithreading common Kernel Objects: CreateEvent event, CreateMutex mutex, CreateSemaphore signal, CreateWaitableTimer timer{Build Event}functionCreateEvent (lpeventattributes:psecurityattributes;{!}Bmanualreset:bool; Binitialstate:bool;

Usage of 1.WaitForSingleObject DWORD WaitForSingleObject ( HANDLE Hhandle, DWORD dwmilliseconds                   ); The parameter hhandle is a handle to an event, and the second parameter, Dwmilliseconds, is the time interval. If the

"Copyright Notice: respect for the original, reproduced please retain the source: blog.csdn.net/shallnet or .../gentleliu, the article is for learning communication only, do not use for commercial purposes"in the previous section, when it comes to

Thread SynchronizationWhen using multiple threads in a program, there are generally few threads that can perform completely independent operations during their lifetimes. There are more cases where some threads do some processing, and other threads

(RPM) critical section, mutex, Semaphore, event difference (thread synchronization) (turn) critical section, mutex, Semaphore, event difference (thread synchronization). Category: C + + Windows core programming 2012-04-10 14:55 3321 people Read

Windows critical section, kernel event, mutex, semaphore. Critical section, kernel event, mutex, semaphore, all can complete the thread synchronization, here put their respective function call, structure definition, as well as apply the situation to

The following are from: http://blog.csdn.net/morewindows/article/details/7470936The use of critical section CS and event events in the classic thread synchronization problem is described earlier. This article describes the use of mutex mutex to

The first of the CreateMutexfunction function: Create mutex (note vs. event creation function)Function Prototypes:HANDLE CreateMutex (Lpsecurity_attributeslpmutexattributes,Boolbinitialowner,Lpctstrlpname);Function Description:The first parameter

What are thread-safe classes and functions that can be called by multiple threads without the occurrence of data-disordered classes and functions called thread-safe classes and functions, the root cause of thread insecurity first is the shared

Multithreading synchronization method now popular process thread synchronous mutex control mechanism, in fact, is the most primitive and basic 4 methods implemented: 1 Critical Zone : Through the serialization of multithreading to access public

This article is a continuation of the 14th chapter of the "DOS to Win32" series of the following, which is recommended for review before reading. As the sweet incense said, command-line arguments are ubiquitous in windows, but generally do not feel,

Inter-process Communication introduction1 , several inter-process communication methods# pipe: A pipe is a half-duplex mode of communication in which data can only flow in one direction and can only be used between processes that have affinity. A

Related Knowledge: 1. Kernel objects mainly include:Access symbol object, event object, file object, file ing object, I/O completed port object, job object, mailbox object, mutex object, pipeline object, process object, Beacon object, thread object 2

// The project references this unit to prevent multiple instances from appearing at the same time.Unit multinst; Interface Uses Windows, messages, sysutils, classes, forms; Implementation ConstStr_unique = '{2be6d96e-827f-4bf9-b33e-8740412cde96

// Use mutex objects to synchronize threads   # Include # Include   DWORD winapi threadpro (lpvoid lpparameter ); DWORD winapi threadpro1 (lpvoid lpparameter );   Int num = 100; Handle hmutex; Int main () { // The mutex object contains one used

In the ApplicationProgramOne advantage of using multiple threads is that each thread can be executed asynchronously. For Windows applications, time-consuming tasks can be executed in the background, so that the application windows and controls

1.1 Process Synchronization Mechanism (1) atomic operation: the so-called atomic operation means that the operation will never be interrupted by any other task or event before execution is completed. That is to say, it is the smallest execution unit,