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RoomModel room.basic.service.timingC {
import room.basic.types.c.* from "CTypes.room"
async ActorClass ATimingService {
Interface {
SPP timer: PTimer
}
Structure {
usercode1 {
"
#include \"platform/etTimer.h\"
#define ET_NB_OF_TCBS 10
typedef struct etTCB etTimerControlBlock;
struct etTCB {
etTargetTime_t expTime;
etTargetTime_t pTime;
int32 portIdx;
etTimerControlBlock* next;
};
"
}
usercode2 {
"//uc2"
}
usercode3{
"//etTimerControlBlock tcbs[ET_NB_OF_TCBS];"
}
ServiceImplementation of timer
Attribute tcbs[10]:tcb
Attribute usedTcbsRoot : tcb ref
Attribute freeTcbsRoot : tcb ref
}
Behavior {
Operation getTcb():tcb ref{"
etTimerControlBlock* temp = freeTcbsRoot;
if(freeTcbsRoot!=0) {
freeTcbsRoot=freeTcbsRoot->next;
temp->next=0;
}
return temp;
"}
Operation returnTcb(block:tcb ref){"
block->next=freeTcbsRoot;
freeTcbsRoot=block;
"}
Operation removeTcbFromUsedList(idx:int32){"
etTimerControlBlock* temp=usedTcbsRoot;
etTimerControlBlock* temp2=usedTcbsRoot;
if (temp==0) return;
if (usedTcbsRoot->portIdx == idx){
// element found, the first one
usedTcbsRoot = usedTcbsRoot->next;
returnTcb(temp);
return;
}
temp=temp->next;
while(temp!=0){
if(temp->portIdx==idx){
temp2->next=temp->next;
returnTcb(temp);
return;
}else{
// try next
temp2=temp;
temp=temp->next;
}
}
"}
Operation putTcbToUsedList(block:tcb ref){"
etTimerControlBlock* temp=usedTcbsRoot;
etTimerControlBlock* temp2=usedTcbsRoot;
if (temp==0){
// list empty put new block to root
block->next=0;
usedTcbsRoot=block;
return;
}
while(1){
if (temp != 0){
if (isTimeGreater(&block->expTime,&temp->expTime)){
//try next position
temp2=temp;
temp=temp->next;
}else{
// right position found
block->next=temp;
if(temp2==usedTcbsRoot){
usedTcbsRoot=block;
}else{
temp2->next=block;
}
return;
}
}else{
// end of list reached
block->next=0;
temp2->next=block;
return;
}
}
"}
Operation isTimeGreater(t1:targetTime ref, t2 :targetTime ref):boolean{"
if (t1->sec > t2->sec) return TRUE;
if (t1->sec < t2->sec) return FALSE;
if (t1->nSec > t2->nSec) return TRUE;
return FALSE;
"}
Operation addTime(t1:targetTime ref, t2:targetTime ref){"
t1->sec += t2->sec;
t1->nSec += t2->nSec;
while(t1->nSec >= 1000000000L){
t1->sec++;
t1->nSec-=1000000000L;
}
"}
Operation printList(){"
etTimerControlBlock* temp=usedTcbsRoot;
printf(\"list: \");
while (temp!=0){
printf(\"(%d,%d),\",temp->expTime.sec,temp->expTime.nSec);
temp=temp->next;
}
printf(\"\\n\");
"}
StateMachine {
Transition tr0: initial -> Operational {
action {
"int i;"
"usedTcbsRoot=0;"
"freeTcbsRoot=&tcbs[0];"
"tcbs[ET_NB_OF_TCBS-1].next=0;"
"for (i=0;i<ET_NB_OF_TCBS-1;i++){"
"\ttcbs[i].next=&tcbs[i+1];"
"\t}"
}
}
Transition tr1: Operational -> Operational {
triggers {
<startTimeout: timer>
}
action {
"etTimerControlBlock* timer = getTcb();"
"etTargetTime_t t;"
"if (timer!= 0){"
"\tt.sec=time/1000;"
"\tt.nSec=(time%1000)*1000000L;"
"\ttimer->pTime.sec = 0;"
"\ttimer->pTime.nSec = 0;"
"\ttimer->portIdx=((etReplSubPort*)ifitem)->index;"
"\tgetTimeFromTarget(&(timer->expTime));"
"\taddTime(&(timer->expTime),&t);"
"\tputTcbToUsedList(timer);"
"\t}"
}
}
Transition tr3: Operational -> Operational {
triggers {
<startTimer: timer>
}
action {
"etTimerControlBlock* timer = getTcb();"
"etTargetTime_t t;"
"if (timer!= 0){"
"\tt.sec=time/1000;"
"\tt.nSec=(time%1000)*1000000L;"
"\ttimer->pTime = t;"
"\ttimer->portIdx=((etReplSubPort*)ifitem)->index;"
"\tgetTimeFromTarget(&(timer->expTime));"
"\taddTime(&(timer->expTime),&t);"
"\tputTcbToUsedList(timer);"
"\t}"
}
}
Transition tr4: Operational -> Operational {
triggers {
<kill: timer>
}
action {
"removeTcbFromUsedList(((etReplSubPort*)ifitem)->index);"
}
}
State Operational {
entry {
"// prepare"
} do {
"// maintain timers"
"etTimerControlBlock* temp;"
"etTargetTime_t t;"
""
"getTimeFromTarget(&t);"
"while (usedTcbsRoot !=0 ){"
"\tif (isTimeGreater(&t,&(usedTcbsRoot->expTime))){"
"\t\ttimer[self->usedTcbsRoot->portIdx].timeout();"
"\t\ttemp=usedTcbsRoot;"
"\t\tusedTcbsRoot=usedTcbsRoot->next;"
"\t\tif((temp->pTime.sec==0)&&(temp->pTime.nSec==0)){"
"\t\t\t// single shot timer"
"\t\t\treturnTcb(temp);"
"\t\t}else{"
"\t\t\t// periodic timer"
"\t\t\taddTime(&temp->expTime,&temp->pTime);"
"\t\t\tputTcbToUsedList(temp);"
"\t\t\t}"
"\t\t}else{"
"\t\t\tbreak;"
"\t\t\t}"
"\t}"
}
}
}
}
}
ProtocolClass PTimer {
usercode1 {"
#define ET_TIMER_RUNNING 0x01
#define ET_TIMER_PERIODIC 0x02
"
}
usercode2 {
"//uc2 "
}
incoming {
Message startTimer(time: uint32)
Message startTimeout(time: uint32)
Message kill()
}
outgoing {
Message timeout()
}
conjugate PortClass
{
handle incoming startTimer{
"if (((PTimerConjPort_var*)(self->varData))->status==0){
((PTimerConjPort_var*)(self->varData))->status=ET_TIMER_RUNNING | ET_TIMER_PERIODIC;
etPort_sendMessage(self, PTimer_IN_startTimer, sizeof(int32), &data);
}
"
}
handle incoming startTimeout{
"if (((PTimerConjPort_var*)(self->varData))->status==0){
((PTimerConjPort_var*)(self->varData))->status = ET_TIMER_RUNNING;
etPort_sendMessage(self, PTimer_IN_startTimeout, sizeof(int32), &data);
}
"
}
handle outgoing timeout{
"//TODO: clear active bit in case of single shot timer
if (((PTimerConjPort_var*)(self->varData))->status!=0){
if (((PTimerConjPort_var*)(self->varData))->status==ET_TIMER_RUNNING){
// single shot timer
((PTimerConjPort_var*)(self->varData))->status=0;
}
// msg to fsm
(*receiveMessageFunc)(actor, self, msg);
}
"
}
handle incoming kill {
"
if (((PTimerConjPort_var*)(self->varData))->status!=0){
((PTimerConjPort_var*)(self->varData))->status=0;
etPort_sendMessage(self, PTimer_IN_kill, 0,NULL);
}
"
}
Attribute status:int8="0"
}
}
ExternalType tcb -> etTimerControlBlock
ExternalType targetTime -> etTargetTime_t
}
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