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/*
* Project: S.Ha.R.K.
*
* Coordinators: Giorgio Buttazzo <giorgio@sssup.it>
*
* ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
*
* http://www.sssup.it
* http://retis.sssup.it
* http://shark.sssup.it
*/
#include "chimera.h"
struct action_event
*first_action_event
= NULL
;
struct action_event
*action_event_list
;
int total_events
= 0;
int get_free_slot
();
int init_action_event
(int number_of_events
) {
action_event_list
= malloc(number_of_events
* sizeof(struct action_event
));
memset(action_event_list
,0,number_of_events
* sizeof(struct action_event
));
total_events
= number_of_events
;
if (action_event_list
!= NULL
) return 0;
total_events
= 0;
return -1;
}
int insert_action_event
(struct action_event
*e
) {
struct action_event
*t
= first_action_event
, *k
= NULL
;
int free;
SYS_FLAGS f
;
f
= kern_fsave
();
free = get_free_slot
();
if (free != -1) {
memcpy(&(action_event_list
[free]),e
,sizeof(struct action_event
));
e
= &(action_event_list
[free]);
} else {
return -1;
}
e
->status
= EVT_STATUS_WAIT
;
if (!t
) {
first_action_event
= e
;
e
->next
= NULL
;
kern_frestore
(f
);
return 0;
}
while(t
) {
if (TIMESPEC_A_LT_B
(&e
->time,&t
->time))
break;
k
= t
;
t
= t
->next
;
}
t
= k
->next
;
k
->next
= e
;
e
->next
= t
;
t
= first_action_event
;
kern_frestore
(f
);
return free;
}
int delete_action_event
(int event
) {
struct action_event
*t
= first_action_event
;
struct action_event
*e
= &(action_event_list
[event
]);
SYS_FLAGS f
;
if ((!t
|| !e
) && (e
->status
!= EVT_STATUS_FREE
)) return -1;
f
= kern_fsave
();
if (t
== e
) {
first_action_event
= t
->next
;
e
->status
= EVT_STATUS_FREE
;
kern_frestore
(f
);
return 0;
}
while(t
) {
if (t
->next
== e
)
break;
t
= t
->next
;
}
if (t
) {
t
->next
= e
->next
;
e
->status
= EVT_STATUS_FREE
;
kern_frestore
(f
);
return 0;
}
kern_frestore
(f
);
return -1;
}
int get_free_slot
() {
int k
= 0;
while (k
< total_events
) {
if (action_event_list
[k
].
status == EVT_STATUS_FREE
||
action_event_list
[k
].
status == EVT_STATUS_DONE
)
return k
;
k
++;
}
return -1;
}
struct action_event
* get_first_old_event
(struct timespec
*time) {
struct action_event
*t
= first_action_event
;
SYS_FLAGS f
;
if (!t
) return NULL
;
f
= kern_fsave
();
if (TIMESPEC_A_GT_B
(time,&(t
->time))) {
first_action_event
= t
->next
;
t
->status
= EVT_STATUS_EXEC
;
kern_frestore
(f
);
return t
;
}
kern_frestore
(f
);
return NULL
;
}