void P_SEND_Timer_IMPL(PRT_MACHINEINST *context, PRT_VALUE *evnt, PRT_VALUE *payload, PRT_BOOLEAN doTransfer)
{
printf("Entering P_SEND_Timer_IMPL\n");
PRT_VALUE *ev;
BOOL success;
TimerContext *timerContext = (TimerContext *)context->extContext;
if (!inStart && evnt->valueUnion.ev == P_EVENT_START) {
printf("Timer received START\n");
LARGE_INTEGER liDueTime;
liDueTime.QuadPart = -10000 * payload->valueUnion.nt;
success = SetWaitableTimer(timerContext->timer, &liDueTime, 0, Callback, context, FALSE);
inStart = TRUE;
PrtAssert(success, "SetWaitableTimer failed");
}
else if (evnt->valueUnion.ev == P_EVENT_CANCEL) {
printf("Timer received CANCEL\n");
inStart = FALSE;
success = CancelWaitableTimer(timerContext->timer);
if (success) {
ev = PrtMkEventValue(P_EVENT_CANCEL_SUCCESS);
PrtSend(context, PrtGetMachine(context->process, timerContext->client), ev, context->id, PRT_FALSE);
}
else {
ev = PrtMkEventValue(P_EVENT_CANCEL_FAILURE);
PrtSend(context, PrtGetMachine(context->process, timerContext->client), ev, context->id, PRT_FALSE);
}
PrtFreeValue(ev);
}
else {
PrtAssert(FALSE, "Illegal event");
}
}
PRT_VALUE *P_FUN_StartTimer_IMPL(PRT_MACHINEINST *context)
{
PRT_MACHINEINST_PRIV *p_tmp_mach_priv = (PRT_MACHINEINST_PRIV *)context;
PRT_VALUE *p_tmp_ret = NULL;
PRT_FUNSTACK_INFO p_tmp_frame;
// pop frame
PrtPopFrame(p_tmp_mach_priv, &p_tmp_frame);
PRT_VALUE* timerMachineId = p_tmp_frame.locals[0];
PRT_MACHINEINST* timerMachine = PrtGetMachine(context->process, timerMachineId);
TimerContext *timerContext = (TimerContext *)timerMachine->extContext;
int timeout_value = p_tmp_frame.locals[1]->valueUnion.nt;
SleepMs(timeout_value);
PRT_VALUE *ev = PrtMkEventValue(P_EVENT_TIMEOUT);
PRT_MACHINEINST* clientMachine = PrtGetMachine(context->process, timerContext->client);
PrtSend(context, clientMachine, ev, context->id, PRT_FALSE);
PrtFreeValue(ev);
// free the frame
PrtFreeLocals(p_tmp_mach_priv, &p_tmp_frame);
return NULL;
}
VOID CALLBACK Callback(LPVOID arg, DWORD dwTimerLowValue, DWORD dwTimerHighValue)
{
inStart = FALSE;
PRT_MACHINEINST *context = (PRT_MACHINEINST *)arg;
TimerContext *timerContext = (TimerContext *)context->extContext;
PRT_VALUE *ev = PrtMkEventValue(P_EVENT_TIMEOUT);
PrtSend(PrtGetMachine(context->process, timerContext->client), ev, context->id, PRT_FALSE);
PrtFreeValue(ev);
}
void
PrtPop(
_Inout_ PRT_MACHINEINST_PRIV *context
)
{
context->lastOperation = PopStatement;
PrtFreeValue(context->currentTrigger);
PrtFreeValue(context->currentPayload);
context->currentTrigger = PrtMkEventValue(PRT_SPECIAL_EVENT_NULL);
context->currentPayload = PrtMkNullValue();
// Actual pop happens in PrtPopState; the exit function must be executed first.
// context->{currentTrigger,currentPayload} are set on for the benefit of the exit function.
}
PRT_BOOLEAN
PrtDequeueEvent(
_Inout_ PRT_MACHINEINST_PRIV *context,
_Inout_ PRT_FUNSTACK_INFO *frame
)
{
PRT_UINT32 queueLength;
PRT_EVENTQUEUE *queue;
PRT_UINT32* deferPacked;
PRT_UINT32 i, head;
queue = &context->eventQueue;
queueLength = queue->eventsSize;
deferPacked = PrtGetDeferredPacked(context, context->currentState);
head = queue->headIndex;
PRT_DBG_ASSERT(queue->size <= queueLength, "Check Failed");
PRT_DBG_ASSERT(queue->size >= 0, "Check Failed");
PRT_DBG_ASSERT(queue->headIndex >= 0, "Check Failed");
PRT_DBG_ASSERT(queue->tailIndex >= 0, "Check Failed");
//
// Find the element to dequeue
//
for (i = 0; i < queue->size; i++) {
PRT_UINT32 index = (head + i) % queueLength;
PRT_EVENT e = queue->events[index];
PRT_UINT32 triggerIndex = PrtPrimGetEvent(e.trigger);
if (context->receive == NULL)
{
if (!PrtIsEventDeferred(triggerIndex, context->currentDeferredSetCompact))
{
PrtFreeValue(context->currentTrigger);
PrtFreeValue(context->currentPayload);
context->currentTrigger = e.trigger;
context->currentPayload = e.payload;
break;
}
}
else
{
if (PrtIsEventReceivable(context, triggerIndex))
{
PrtFreeValue(context->currentTrigger);
PrtFreeValue(context->currentPayload);
context->currentTrigger = e.trigger;
context->currentPayload = e.payload;
for (PRT_UINT32 i = 0; i < context->receive->nCases; i++)
{
PRT_CASEDECL *rcase = &context->receive->cases[i];
if (triggerIndex == rcase->triggerEventIndex)
{
frame->rcase = rcase;
PrtPushNewEventHandlerFrame(context, rcase->funIndex, frame->locals);
break;
}
}
context->receive = NULL;
break;
}
}
}
//
// Check if not found
//
if (i == queue->size) {
if (context->receive == NULL)
{
if (PrtStateHasDefaultTransitionOrAction(context))
{
PrtFreeValue(context->currentTrigger);
PrtFreeValue(context->currentPayload);
context->currentTrigger = PrtMkEventValue(PRT_SPECIAL_EVENT_NULL);
context->currentPayload = PrtMkNullValue();
return PRT_TRUE;
}
else
{
return PRT_FALSE;
}
}
else
{
PRT_BOOLEAN hasDefaultCase = (context->process->program->eventSets[context->receive->caseSetIndex].packedEvents[0] & 0x1) == 1;
if (hasDefaultCase)
{
PrtFreeValue(context->currentTrigger);
PrtFreeValue(context->currentPayload);
context->currentTrigger = PrtMkEventValue(PRT_SPECIAL_EVENT_NULL);
context->currentPayload = PrtMkNullValue();
for (PRT_UINT32 i = 0; i < context->receive->nCases; i++)
{
PRT_CASEDECL *rcase = &context->receive->cases[i];
if (PRT_SPECIAL_EVENT_NULL == rcase->triggerEventIndex)
{
frame->rcase = rcase;
PrtPushNewEventHandlerFrame(context, rcase->funIndex, frame->locals);
break;
}
}
context->receive = NULL;
return PRT_TRUE;
}
else
{
return PRT_FALSE;
}
}
}
//
// Collapse the event queue on the removed event
// by moving the previous elements forward.
//
for (; i > 0; i--) {
INT index = (head + i) % queueLength;
INT prev = (index - 1 + queueLength) % queueLength;
queue->events[index] = queue->events[prev];
}
//
// Adjust the queue size
//
queue->headIndex = (queue->headIndex + 1) % queueLength;
queue->size--;
PRT_DBG_ASSERT(queue->size <= queueLength, "Check Failed");
PRT_DBG_ASSERT(queue->size >= 0, "Check Failed");
PRT_DBG_ASSERT(queue->headIndex >= 0, "Check Failed");
PRT_DBG_ASSERT(queue->tailIndex >= 0, "Check Failed");
//
//Log
//
PrtLog(PRT_STEP_DEQUEUE, context);
return PRT_TRUE;
}
PRT_MACHINEINST_PRIV *
PrtMkMachinePrivate(
_Inout_ PRT_PROCESS_PRIV *process,
_In_ PRT_UINT32 instanceOf,
_In_ PRT_VALUE *payload
)
{
PRT_UINT32 packSize;
PRT_UINT32 nVars;
PRT_UINT8 eQSize;
PRT_MACHINEINST_PRIV *context;
PRT_UINT32 i;
PrtLockMutex(process->processLock);
nVars = process->program->machines[instanceOf].nVars;
eQSize = PRT_QUEUE_LEN_DEFAULT;
//
// Allocate memory for state machine context
//
context = (PRT_MACHINEINST_PRIV*)PrtMalloc(sizeof(PRT_MACHINEINST_PRIV));
//
// Add it to the array of machines in the process
//
PRT_UINT32 numMachines = process->numMachines;
PRT_UINT32 machineCount = process->machineCount;
PRT_MACHINEINST **machines = process->machines;
if (machineCount == 0)
{
machines = (PRT_MACHINEINST **)PrtCalloc(1, sizeof(PRT_MACHINEINST *));
process->machines = machines;
process->machineCount = 1;
}
else if (machineCount == numMachines) {
PRT_MACHINEINST **newMachines = (PRT_MACHINEINST **)PrtCalloc(2 * machineCount, sizeof(PRT_MACHINEINST *));
for (PRT_UINT32 i = 0; i < machineCount; i++)
{
newMachines[i] = machines[i];
}
PrtFree(machines);
machines = newMachines;
process->machines = newMachines;
process->machineCount = 2 * machineCount;
}
machines[numMachines] = (PRT_MACHINEINST *)context;
process->numMachines++;
//
// Initialize Machine Identity
//
context->process = (PRT_PROCESS *)process;
context->instanceOf = instanceOf;
PRT_MACHINEID id;
id.machineId = process->numMachines; // index begins with 1 since 0 is reserved
id.processId = process->guid;
context->id = PrtMkMachineValue(id);
context->extContext = NULL;
context->isModel = PRT_FALSE;
//
// Initialize the map used in PrtDist, map from sender to the last seqnumber received
//
PRT_TYPE *domType = PrtMkPrimitiveType(PRT_KIND_MACHINE);
PRT_TYPE *codType = PrtMkPrimitiveType(PRT_KIND_INT);
PRT_TYPE *recvMapType = PrtMkMapType(domType, codType);
context->recvMap = PrtMkDefaultValue(recvMapType);
PrtFreeType(domType);
PrtFreeType(codType);
PrtFreeType(recvMapType);
// Initialize Machine Internal Variables
//
context->currentState = process->program->machines[context->instanceOf].initStateIndex;
context->isRunning = PRT_FALSE;
context->isHalted = PRT_FALSE;
context->lastOperation = ReturnStatement;
context->currentTrigger = PrtMkEventValue(PRT_SPECIAL_EVENT_NULL);
context->currentPayload = PrtCloneValue(payload);
//
// Allocate memory for local variables and initialize them
//
context->varValues = NULL;
if (nVars > 0)
{
context->varValues = PrtCalloc(nVars, sizeof(PRT_VALUE*));
for (i = 0; i < nVars; i++)
{
context->varValues[i] = PrtMkDefaultValue(process->program->machines[instanceOf].vars[i].type);
}
}
context->receive = NULL;
//
// Initialize various stacks
//
context->callStack.length = 0;
context->funStack.length = 0;
//
// Initialize event queue
//
context->eventQueue.eventsSize = eQSize;
context->eventQueue.events = (PRT_EVENT*)PrtCalloc(eQSize, sizeof(PRT_EVENT));
context->eventQueue.headIndex = 0;
context->eventQueue.tailIndex = 0;
context->eventQueue.size = 0;
packSize = PrtGetPackSize(context);
//
// Initialize Inherited Deferred Set
//
context->inheritedDeferredSetCompact = (PRT_UINT32*)PrtCalloc(packSize, sizeof(PRT_UINT32));
//
// Initialize the current deferred set
//
context->currentDeferredSetCompact = (PRT_UINT32*)PrtCalloc(packSize, sizeof(PRT_UINT32));
//
// Initialize actions
//
context->inheritedActionSetCompact = (PRT_UINT32*)PrtCalloc(packSize, sizeof(PRT_UINT32));
context->currentActionSetCompact = (PRT_UINT32*)PrtCalloc(packSize, sizeof(PRT_UINT32));
//
//Initialize state machine lock
//
context->stateMachineLock = PrtCreateMutex();
//
//Log
//
PrtLog(PRT_STEP_CREATE, context);
//
// Allocate external context Structure
//
process->program->machines[context->instanceOf].extCtorFun((PRT_MACHINEINST *)context, payload);
PrtUnlockMutex(process->processLock);
//
// Run the state machine
//
PrtLockMutex(context->stateMachineLock);
PrtRunStateMachine(context, PRT_FALSE);
return context;
}
