Observer Library

Deterministic observer pattern for embedded systems. More...

Files
file	observer.c
	Deterministic Observer pattern implementation for safety-critical systems.
file	observer.h
	Public API for the deterministic Observer library.

Typedefs
typedef void(*	observer_cb_t) (void)
	Callback without arguments.
typedef void(*	observer_cb_state_t) (event_state_e state)
	Callback taking event_state_e argument.
typedef void(*	observer_cb_u8_arg_t) (uint8_t data)
	Callback taking uint8_t argument.

Enumerations
enum	subscr_status_e { OBSERVER_OK = 0u , OBSERVER_INVALID_ARGUMENT_ERROR = 1u , OBSERVER_TABLE_FULL_ERROR = 2u , OBSERVER_TABLE_EMPTY_ERROR = 3u }
	Subscription operation status codes. More...
enum	event_state_e { EVENT_STATE_EXIT = 0u , EVENT_STATE_ENTER = 1u }
	Event state passed to event_state_e callbacks.

Detailed Description

Deterministic observer pattern for embedded systems.

@safety This header defines types only; no runtime behavior is implemented.

Enumeration Type Documentation

subscr_status_e

enum subscr_status_e

Subscription operation status codes.

Note

• OBSERVER_OK == 0 (success)
• OBSERVER_INVALID_ARGUMENT_ERROR indicates invalid input parameters.
• OBSERVER_TABLE_FULL_ERROR indicates no free slots available.
• OBSERVER_TABLE_EMPTY_ERROR indicates table has no valid entries.