A permit-based synchronization object. A down operation waits until it can consume a permit; an up operation supplies one. Unlike ownership-based mutex use, signalling can pass between different software threads.
A semaphore that satisfies registered down requests in FIFO queue order. Direct handoff reserves a released permit for the oldest waiter rather than exposing it to competing newcomers. The ordering of truly concurrent registrations is determined by the registration mechanism.
A semaphore with at most one available permit. Initially unavailable instances support event signalling; initially available instances can protect one-at-a-time access under a balanced acquisition-and-release discipline.
A semaphore with a nonnegative number of available permits. Its contract must state initial availability and whether unmatched releases beyond an initial or configured bound are allowed.

Ancestors (6)

  1. Synchronization (computing)
  2. Thread (computing)
  3. Process (computing)
  4. Operating system
  5. Computer science
  6. Home

Synonyms (1)

View article source

Discussion (0) New discussion

There are no discussions about this article yet.

Articles by others on the same topic (0)

There are currently no matching articles.
See all articles in the same topic Create my own version