Crate mwdg 

mwdg - Micro-Watchdog Library

A no_std software multi-watchdog library for embedded RTOS systems.

Each RTOS task registers a mwdg_node with a timeout interval. The task periodically calls mwdg_feed to signal liveness. A central mwdg_check function verifies all registered watchdogs are healthy, enabling the main loop to gate hardware watchdog resets.

C FFI

All public functions declared to be exposed without mangling, so the library can be linked from C/C++ code. Use the generated include/mwdg.h header for having proper interface declaration.

A user of the library must provide the following functions that the library uses to get system timestamp in milliseconds, enter/exit critical sections.

extern uint32_t mwdg_get_time_milliseconds(void);
extern void mwdg_enter_critical(void);
extern void mwdg_exit_critical(void);

Structs

mwdg_node

A single software watchdog node.

Functions

mwdg_add^⚠

Register a software watchdog with the given timeout.

mwdg_assign_id^⚠

Assign a user-chosen identifier to a watchdog node.

mwdg_check^⚠

Check all registered watchdogs for expiration.

mwdg_feed^⚠

Feed (touch) a watchdog, resetting its timestamp to the current time.

mwdg_get_next_expired^⚠

Iterate over registered watchdogs and find the next expired one.

mwdg_init^⚠

Initialize the multi-watchdog subsystem.

mwdg_remove^⚠

Remove a previously registered watchdog from the global list.