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In Linux kernel development, spinlocks are essential synchronization primitives for protecting shared resources in interrupt contexts. This article demonstrates how to implement interrupt-safe spinlocks in a character device driver for controlling GPIO-based LEDs. We'll explore the use of spinlock functions that save and restore interrupt state ...

Understanding atomic_flag The atomic_flag is the simplest atomic boolean type in C++11's <atomic> header, supporting only two operations: test_and_set and clear. Constructor and Initialization atomic_flag() noexcept = default; atomic_flag(const atomic_flag&) = delete; atomic_flag has only a default constructor. Copy construction is d ...