sm.h

#ifndef CRTX_SM_H
#define CRTX_SM_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
/*
 * Mario Kicherer (dev@kicherer.org)
 *
 */
 
enum crtx_sms_event {
    CRTX_SMSE_ENTER,
    CRTX_SMSE_TRIGGER,
    CRTX_SMSE_LEAVE,
};
 
struct crtx_sm;
struct crtx_sm_state;
 
typedef int (*crtx_sm_callback)(struct crtx_sm_state *sms, enum crtx_sms_event event);
typedef int (*crtx_sm_release_callback)(struct crtx_sm *sm);
 
struct crtx_sm_state {
    char *name;
    
    crtx_sm_callback enter;
    crtx_sm_callback trigger;
    crtx_sm_callback leave;
    
    struct crtx_sm *sm;
};
 
#define CRTX_SMF_RELEASE    (1<<0)
 
struct crtx_sm {
    struct crtx_sm_state *cur_state;
    
    _Atomic unsigned int n_schedules;
    crtx_sm_release_callback release_cb;
    int flags;
    
    void *userdata;
};
 
int crtx_change_state(struct crtx_sm *sm, struct crtx_sm_state *sms);
int crtx_release_sm(struct crtx_sm *sm);
 
#ifdef __cplusplus
}
#endif
 
#endif