こんにちは、スーパーソフトウエア東京オフィス技術部の加藤です。 組み込み開発でよく登場する「mutex（ミューテックス）」と「セマフォ（semaphore）」。それぞれ何のために使うのか？どう違うのか？疑問に感じたことはありませんか？本記事では、その ...

Mutex is an abbreviation for "mutual exclusion". Mutex variables are one of the primary means of implementing thread synchronization and for protecting shared data when multiple writes occur. A mutex ...

This two-part series addresses the use and misuse of two of the most essential synchronization primitives in modern embedded systems, the mutex (this part) and the semaphore (part 2). Mutexes and ...

Modern real-time operating systems support multitasking with a priority-based pre-emptive scheduler. Each concurrent task (or "thread") in an application program is assigned a priority number. It is ...

#define debug_mutex_wake_waiter(lock, waiter) do { } while (0) #define debug_mutex_free_waiter(waiter) do { } while (0) #define debug_mutex_add_waiter(lock, waiter ...