event.h

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#ifndef UEL_EVENT_H
#define UEL_EVENT_H
 
#include <stdint.h>
#include <stdbool.h>
 
#include "uevloop/utils/closure.h"
#include "uevloop/utils/linked-list.h"
 
enum uel_event_type {
    UEL_CLOSURE_EVENT,
    UEL_TIMER_EVENT,
    UEL_SIGNAL_EVENT,
    UEL_SIGNAL_LISTENER_EVENT,
    UEL_OBSERVER_EVENT
};
typedef enum uel_event_type uel_event_type_t;
 
 
enum uel_event_timer_status {
    UEL_TIMER_RUNNING,
    UEL_TIMER_PAUSED,
    UEL_TIMER_CANCELLED
};
typedef enum uel_event_timer_status uel_event_timer_status_t;
 
 
typedef struct event uel_event_t;
struct event {
    uel_event_type_t type; 
    uel_closure_t closure; 
    void *value; 
    bool repeating; 
 
    union uel_event_detail {
 
        struct uel_event_timer {
            uint32_t due_time;
            uint16_t timeout; 
            uel_event_timer_status_t status; 
        } timer; 
 
        struct uel_event_signal {
            uintptr_t value; 
            uel_llist_t *listeners; 
        } signal; 
 
        struct uel_event_listener {
            bool unlistened;
        } listener; 
 
        struct uel_event_observer {
            volatile uintptr_t *condition_var; 
            uintptr_t last_value; 
            bool cancelled;
        } observer; 
    } detail; 
};
 
void uel_event_config_closure(
    uel_event_t *event,
    uel_closure_t *closure,
    void *value,
    bool repeating
);
 
void uel_event_config_signal(
    uel_event_t *event,
    uintptr_t signal,
    uel_llist_t *listeners,
    void *params
);
 
void uel_event_config_signal_listener(uel_event_t *event, uel_closure_t *closure, bool repeating);
 
void uel_event_config_observer(
    uel_event_t *event,
    uel_closure_t *closure,
    volatile uintptr_t *condition_var,
    bool repeating
);
 
void uel_event_observer_cancel(uel_event_t *event);
 
void uel_event_config_timer(
    uel_event_t *event,
    uint16_t timeout_in_ms,
    bool repeating,
    bool immediate,
    uel_closure_t *closure,
    void *value,
    uint32_t current_time
);
 
void uel_event_timer_pause(uel_event_t *event);
 
void uel_event_timer_resume(uel_event_t *event);
 
void uel_event_timer_cancel(uel_event_t *event);
 
#endif  /* UEL_EVENT_H */