(Askeri) FLAMA MUHABERESİ, SEMAFOR MUHABERESİ (DZ.): Flamalar vasıtasıyla muhabere usulü. Bu usulde; flamacı, her iki elinde birer flama tutarak, bunları, bir kod sistemine göre, çeşitli vaziyetlerde indirip kaldırarak işaret verir
Definition of semaphore in English English dictionary
A visual system for transmitting information by means of two flags that are held one in each hand, using an alphabetic and numeric code based on the position of the signaler’s arms
A bit, token, fragment of code, or some other mechanism which is used to restrict access to a shared function or device to a single process at a time, or to synchronize and coordinate events in different processes
A locking mechanism used inside resource managers or resource dispensers Semaphores have no symbolic namesonly shared and exclusive mode accessno deadlock detection, and no automatic release or commit
{i} method of communication based on the use of handheld flags which are moved to represent different letters of the alphabet; (Computers) status flag used to restrict access to shared resources by locking the resource being used and preventing access
A Kernel object used to synchronise co-operating threads in Symbian OS Access to the semaphore is through an RSemaphore handle
A semaphore is an IRIX system object that provides mutual exclusion of shared resources and interprocess synchronization
An integer counter and an associated thread-wait queue When initialized, the semaphore counter receives a user-defined positive or null value
(1) A variable that is used to enforce mutual exclusion (2) In the Windows operating system, a synchronization kernel object used to control the number of threads that simultaneously use a shared resource See kernel object, critical section, event object, mutex object (3) In the OS/2 operating system, a way to coordinate access to shared resources in multithread programs See critical section, event semaphore, mutex semaphore, muxwait semaphore
A synchronization object used for interprocess communication A semaphore maintains a count between zero and a maximum value A semaphore is in a signaled state when its count is positive, and in a nonsignaled state when its count is zero Back
an apparatus for visual signaling with lights or mechanically moving arms convey by semaphore, of information send signals by or as if by semaphore
a programming structure that allows processes to synchronize A semaphore allows n processes to progress through a protected area and forces all that follow to wait until the area is cleared; as each process clears the protected area another process is allowed to enter
A mechanism for inter-task communication, provided by the operating system A semaphore is similar to a mutex, but provides a counter instead of a binary state
A visual system for transmitting information by means of two flags that are held one in each hand, using an alphabetic code based on the position of the signaler's arms
A flag used to indicate that a routine cannot proceed if a shared resource is already in use by another routine
A locking mechanism used inside resource managers or resource dispensers Semaphores have no symbolic names only shared and exclusive mode access no deadlock detection, and no automatic release or commit
A synchronization kernel object used for counting resources A semaphore offers a thread the ability to query the number of resources available If one or more resources are available, the count of available resources is decremented See critical section, kernel object, mutex, event
A synchronization primitive that is used to lock critical sections so that the section is used exclusively by the thread that locked it
A synchronization mechanism on an operating system A method with which multiple applications can coordinate related operations using messages
Semaphore is a system of sending messages by using two flags. You hold a flag in each hand and move your arms to various positions representing different letters of the alphabet. a system of sending messages using two flags, which you hold in different positions to represent letters and numbers (sema + -phoros ). Method of visual signaling, usually with flags or lights. Before radio, a semaphore system was widely used to send messages between ships. A person would stand with arms extended, moving two flags to specific angles to indicate letters or numbers. Before the invention of the telegraph, semaphore signaling with lights on high towers was used to transmit messages between distant points; messages were read by telescope. Modern semaphores have included movable arms or rows of light simulating arms, displayed from towers and used to signal railroad trains
As per the literature, a mutual exclusion or resource management method where tasks sleep waiting for a semaphore to be granted to them Later versions of the Linux kernel also provide a more complicated type, the read-write semaphore, which allows a task to specify its intentions with regard to the resource Hence several readers are allowed for the resource, but a writer will have mutual exclusion
A programming language primitive that enables mutual exclusion to be achieved Unlike monitors, the code to do this ends up distributed throughout a program making it difficult to maintain and prone to errors
A signal telegraph; an apparatus for giving signals by the disposition of lanterns, flags, oscillating arms, etc
Used to control access to a limited shared resource or to coordinate execution between threads Activates threads one at a time Semaphores contain a counter
A synchronization mechanism based on a "semaphore" abstract data type with the following characteristics A semaphore has a value that is constrained to be a non-negative integer The allowable operations on a semaphore are V ("signal") and P ("wait"); both are atomic operations A V operation increases the value of the semaphore by one A P operation decreases the value of the semaphore by one, when that can be done without violating the constraint that the value be non-negative (i e , a P operation that is initiated when the value of the semaphore is 0 suspends until the value becomes positive)
A semaphore is an interprocess synchronization object that maintains a count between zero and some maximum value The object's state is set to signaled when its count is greater than zero, and nonsignaled when its count is zero The semaphore object is useful in controlling a shared resource that can support a limited number of users It acts as a gate that limits the number of threads sharing the resource to a specified maximum number There are different kinds of semaphores: EventSemaphore (uses events for signalling), MutexSemaphore (can only contain the value: 0 or 1) and then ordinary Semaphores Semaphore support is built into Windows and can be accessed through the CreateSemaphore() function Windows also supplies several wait functions (look up wait functions in the Win32 API reference) for controlling semaphores (Submitted by: Jeppe Cramon 9/20/99)
A method with which multiple applications can coordinate related operations using messages
Similar to a lock, except that a finite number of threads can be holding a semaphore at the same time See also lock
[ 'se-m&-"fOr, -"for ] (noun.) 1816. Borrowed in 1816 from French sémaphore, coined in French from Ancient Greek σῆμα (sêma, “sign”), and -φωρος (-phoros), from φέρω (férō, “to bear, carry”).