CWaitableTimer is a custom, reusable C++ wrapper class designed to simplify the native Windows Waitable Timer API for high-resolution periodic execution or precise thread blocking. By encapsulating the complex structures of the Win32 subsystem, it provides an object-oriented way to bypass default Windows thread sleep limitations (which normally sit at a loose 10 to 15.6 milliseconds). The Core Problem It Solves
Standard approaches like Sleep(1) or WM_TIMER messages do not guarantee precise millisecond timing because they align directly with the global operating system clock interrupts. If an application requests a 1ms delay, it can actually take anywhere up to 15.6ms depending on the CPU state. CWaitableTimer leverages dedicated synchronization handles to ensure reliable, high-frequency execution patterns. Key Technical Mechanisms
The architectural foundation of a proper high-resolution CWaitableTimer relies on three Win32 primitives: CWaitableTimer | CodeGuru
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