what is mutex?
- 4 Answers
- 9250 Views
- Axiom, Blue Star, SQL Star, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / rock star
Mutual exclusion (often abbreviated to mutex) algorithms are
used in concurrent programming to avoid the simultaneous use
of a common resource, such as a global variable, by pieces
of computer code called critical sections.
Examples of such resources are fine-grained flags, counters
or queues, used to communicate between code that runs
concurrently, such as an application and its interrupt
handlers. The problem is acute because a thread can be
stopped or started at any time.
To illustrate: suppose a section of code is mutating a piece
of data over several program steps, when another thread,
perhaps triggered by some unpredictable event, starts
executing. If this second thread reads from the same piece
of data, the data, in the process of being overwritten, is
in an inconsistent and unpredictable state. If the second
thread tries overwriting that data, the ensuing state will
probably be unrecoverable. These critical sections of code
accessing shared data must therefore be protected, so that
other processes which read from or write to the chunk of
data are excluded from running.
A mutex is also a common name for a program object that
negotiates mutual exclusion among threads, also called a lock.
| Is This Answer Correct ? | 8 Yes | 3 No |
Answer / nadeem khokhar
A mutex and the binary semaphore are essentially the same. Both can take values: 0 or 1. However, there is a significant difference between them that makes mutexes more efficient than binary semaphores.
A mutex can be unlocked only by the thread that locked it.
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / sunildummati
Short for mutual exclusion object. In computer
programming, a mutex is a program object that allows
multiple program threads to share the same resource, such
as file access, but not simultaneously. When a program is
started, a mutex is created with a unique name. After this
stage, any thread that needs the resource must lock the
mutex from other threads while it is using the resource.
The mutex is set to unlock when the data is no longer
needed or the routine is finished.
(2) When spelled MuTeX, a package of macros for the TeX
typesetting system that supports musical notation. MuTeX
was written by Andrea Steinbach and Angelika Schofer, as a
master's thesis at Rheinische Friedrich-Wilhelms
University.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / rajesh verma
A Mutex is a mutually exclusive flag. It acts as a gate keeper to a section of code allowing one thread in and blocking access to all others. This ensures that the code being controled will only be hit by a single read at a time. Just be sure to release the mutex when you are
| Is This Answer Correct ? | 0 Yes | 0 No |
What is the client concept in SAP? What is the meaning of client independent?
what is different between kenerl mode and user mode?
give idea for creating screen in abap
5. Which of the following can you do with DB2 Express- C? Query databases with SQL Query databases with XML using XQuery and XPath Use SQL in Xquery and Xquery in SQL All of the above
73. How can you set the status and title for a modal dialog box? a) In the attributes of the corresponding screen. b) Before the corresp. call screen statement. c) In a PBO module of the corresponding screen. d) In the PAI module of the corresponding screen.
write a sql qwery which include joining of two tables 4 marks mainframe
HOW TO FIND NUMBER OF TWOS IN N!(N FACTORIAL)??
which property is used to display the advertisements with adrotator control
WHAT IS NV RAM ?
In staad pro, how can we design ROOF SLAB?
along with oracle which language will be beneficial to have knowledge with,java,.net,since i m doing oracle have appeared for 8th sem BEIT,plz suggest
when a query is made on Logical file in DB2/400, will the records satisfying select/omit criterion be fetched from all members of physical file or only the member with same name as physical file?
C 
