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