multithreading - What is a semaphore? - Stack Overflow
2008年8月29日 · A semaphore is a programming concept that is frequently used to solve multi-threading problems. My question to the community: What is a semaphore and how do you use it?
2023年11月14日 · A semaphore is an object with an integer value that we can manipulate with two routines; in the POSIX standard, these routines are sem wait() and sem post()1. Because …
Why use a mutex and not a semaphore? - Stack Overflow
2025年4月27日 · In general, mutex and semaphore target different use cases: A semaphore is for signalling, a mutex is for mutual exclusion. Mutual exclusion means you want to make sure …
Difference between binary semaphore and mutex - Stack Overflow
The main difference between binary semaphore and mutex is that semaphore is a signaling mechanism and mutex is a locking mechanism, but binary semaphore seems to function like …
Understanding Semaphores in C# - Stack Overflow
2021年12月23日 · A Semaphore is a synchronization object that allows a limited degree of parallelism in a code section. For sake of simplicity, suppose you are instantiating a fresh new …
java - How does semaphore work? - Stack Overflow
2009年8月3日 · The Java Semaphore class allows a reverse situation, where a semaphore can start off with a negative number of permits, and all acquire() calls will fail until there have been …
What is the difference between lock, mutex and semaphore?
2010年2月25日 · I've heard these words related to concurrent programming, but what's the difference between lock, mutex and semaphore?
When should I use semaphores? - Stack Overflow
2011年4月8日 · Semaphores might be appropriate for signaling between processes. For multithreaded programming, semaphores should be avoided. If you need exclusive access to …
Difference between Semaphore initialized with 1 and 0
2014年8月29日 · Semaphore is a low-level mechanism for concurrency: a counter when reaching zero blocking thread execution. It stems from Dijkstra where the binary semaphore (0, 1) is a …
critical section - Understanding semaphores - Stack Overflow
2014年2月15日 · I think you're having trouble with the distinction between a semaphore and a mutex. A binary semaphore can be implemented in the same way as a mutex, but they are …