PRT_TYPE * PRT_CALL_CONV PrtMkNmdTupType(_In_ PRT_UINT32 arity)
{
PrtAssert(arity > 0, "Invalid tuple arity");
PRT_TYPE *type = (PRT_TYPE *)PrtMalloc(sizeof(PRT_TYPE));
PRT_NMDTUPTYPE *nmdTup = (PRT_NMDTUPTYPE *)PrtMalloc(sizeof(PRT_NMDTUPTYPE));
type->typeKind = PRT_KIND_NMDTUP;
type->typeUnion.nmTuple = nmdTup;
nmdTup->arity = arity;
nmdTup->fieldNames = (PRT_STRING *)PrtCalloc((size_t)arity, sizeof(PRT_STRING));
nmdTup->fieldTypes = (PRT_TYPE **)PrtCalloc((size_t)arity, sizeof(PRT_TYPE *));
return type;
}
PRT_VALUE* PrtFormatPrintf(_In_ PRT_CSTRING msg, ...)
{
PrtPrintf(msg);
va_list argp;
va_start(argp, msg);
PRT_UINT32 numArgs, numSegs;
numArgs = va_arg(argp, PRT_UINT32);
PRT_VALUE **args = (PRT_VALUE **)PrtCalloc(numArgs, sizeof(PRT_VALUE *));
for (PRT_UINT32 i = 0; i < numArgs; i++)
{
// skip over arg status
PRT_FUN_PARAM_STATUS argStatus = va_arg(argp, PRT_FUN_PARAM_STATUS);
args[i] = va_arg(argp, PRT_VALUE *);
}
numSegs = va_arg(argp, PRT_UINT32);
for (PRT_UINT32 i = 0; i < numSegs; i++)
{
PRT_UINT32 argIndex = va_arg(argp, PRT_UINT32);
PrtPrintValue(args[argIndex]);
PRT_CSTRING seg = va_arg(argp, PRT_CSTRING);
PrtPrintf(seg);
}
va_end(argp);
PrtFree(args);
return NULL;
}
static void ResizeBuffer(_Inout_ char **buffer, _Inout_ PRT_UINT32 *bufferSize, _Inout_ PRT_UINT32 numCharsWritten, PRT_UINT32 resizeNum)
{
PRT_UINT32 padding = 100;
if (*buffer == NULL)
{
*bufferSize = resizeNum + 1 + padding;
*buffer = (char *)PrtCalloc(*bufferSize, sizeof(char));
}
else if (*bufferSize < numCharsWritten + resizeNum + 1)
{
PRT_UINT32 newBufferSize = numCharsWritten + resizeNum + 1 + padding;
char *newBuffer = (char *)PrtCalloc(newBufferSize, sizeof(char));
strcpy_s(newBuffer, newBufferSize, *buffer);
PrtFree(*buffer);
*buffer = newBuffer;
*bufferSize = newBufferSize;
}
}
PRT_TYPE * PRT_CALL_CONV PrtMkTupType(_In_ PRT_UINT32 arity)
{
PrtAssert(arity > 0, "Invalid tuple arity");
PRT_TYPE *type = (PRT_TYPE *)PrtMalloc(sizeof(PRT_TYPE));
PRT_TUPTYPE *tup = (PRT_TUPTYPE *)PrtMalloc(sizeof(PRT_TUPTYPE));
type->typeKind = PRT_KIND_TUPLE;
type->typeUnion.tuple = tup;
tup->arity = arity;
tup->fieldTypes = (PRT_TYPE **)PrtCalloc((size_t)arity, sizeof(PRT_TYPE *));
return type;
}
void
PrtPushNewFrame(
_Inout_ PRT_MACHINEINST_PRIV *context,
_In_ PRT_UINT32 funIndex,
_In_ PRT_VALUE *parameters
)
{
PRT_UINT16 length = context->funStack.length;
PrtAssert(length < PRT_MAX_FUNSTACK_DEPTH, "Fun stack overflow");
context->funStack.length = length + 1;
context->funStack.funs[length].funIndex = funIndex;
PRT_FUNDECL *funDecl = &(context->process->program->machines[context->instanceOf].funs[funIndex]);
PRT_VALUE **locals = NULL;
if (funDecl->maxNumLocals == 0)
{
PrtAssert(parameters == NULL && funDecl->localsNmdTupType == NULL, "Incorrect maxNumLocals value");
}
else
{
locals = PrtCalloc(funDecl->maxNumLocals, sizeof(PRT_VALUE *));
for (PRT_UINT32 i = 0; i < funDecl->maxNumLocals; i++)
{
locals[i] = NULL;
}
PRT_UINT32 count = 0;
if (parameters != NULL)
{
PRT_UINT32 size = parameters->valueUnion.tuple->size;
for (PRT_UINT32 i = 0; i < size; i++)
{
locals[count] = PrtTupleGet(parameters, i);
count++;
}
PrtFreeValue(parameters);
}
if (funDecl->localsNmdTupType != NULL)
{
PRT_UINT32 size = funDecl->localsNmdTupType->typeUnion.nmTuple->arity;
for (PRT_UINT32 i = 0; i < size; i++)
{
PRT_TYPE *indexType = funDecl->localsNmdTupType->typeUnion.nmTuple->fieldTypes[i];
locals[count] = PrtMkDefaultValue(indexType);
count++;
}
}
}
context->funStack.funs[length].locals = locals;
context->funStack.funs[length].freeLocals = PRT_TRUE;
context->funStack.funs[length].returnTo = 0xFFFF;
context->funStack.funs[length].rcase = NULL;
}
void
PrtPushNewEventHandlerFrame(
_Inout_ PRT_MACHINEINST_PRIV *context,
_In_ PRT_UINT32 funIndex,
_In_ PRT_VALUE **locals
)
{
PRT_UINT16 length = context->funStack.length;
PrtAssert(length < PRT_MAX_FUNSTACK_DEPTH, "Fun stack overflow");
context->funStack.length = length + 1;
context->funStack.funs[length].funIndex = funIndex;
PRT_BOOLEAN freeLocals = (locals == NULL);
PRT_FUNDECL *funDecl = &(context->process->program->machines[context->instanceOf].funs[funIndex]);
if (locals == NULL && funDecl->maxNumLocals != 0)
{
locals = PrtCalloc(funDecl->maxNumLocals, sizeof(PRT_VALUE *));
for (PRT_UINT32 i = 0; i < funDecl->maxNumLocals; i++)
{
locals[i] = NULL;
}
}
PRT_UINT32 count = funDecl->numEnvVars;
if (funDecl->name == NULL)
{
PrtAssert(0 < count, "numEnvVars must be positive for anonymous function");
PRT_UINT32 payloadIndex = count - 1;
if (locals[payloadIndex] != NULL)
{
PrtFreeValue(locals[payloadIndex]);
}
locals[payloadIndex] = PrtCloneValue(context->currentPayload);
}
if (funDecl->localsNmdTupType != NULL)
{
PRT_UINT32 size = funDecl->localsNmdTupType->typeUnion.nmTuple->arity;
for (PRT_UINT32 i = 0; i < size; i++)
{
PRT_TYPE *indexType = funDecl->localsNmdTupType->typeUnion.nmTuple->fieldTypes[i];
if (locals[count] != NULL)
{
PrtFreeValue(locals[count]);
}
locals[count] = PrtMkDefaultValue(indexType);
count++;
}
}
context->funStack.funs[length].locals = locals;
context->funStack.funs[length].freeLocals = freeLocals;
context->funStack.funs[length].returnTo = 0xFFFF;
context->funStack.funs[length].rcase = NULL;
}
void
PrtResizeEventQueue(
_Inout_ PRT_MACHINEINST_PRIV *context
)
{
PRT_UINT32 maxEventQueueSize = context->process->program->machines[context->instanceOf].maxQueueSize;
PRT_UINT32 currEventQueueSize = context->eventQueue.eventsSize;
PRT_UINT32 newQueueSize = (maxEventQueueSize != 0xffffffff && currEventQueueSize * 2 > maxEventQueueSize) ? maxEventQueueSize : currEventQueueSize * 2;
PRT_EVENT* oldQueue = context->eventQueue.events;
PRT_UINT32 oldHead = context->eventQueue.headIndex;
PRT_UINT32 oldTail = context->eventQueue.tailIndex;
PRT_EVENT *newQueue = (PRT_EVENT*)PrtCalloc(newQueueSize, sizeof(PRT_EVENT));
PRT_UINT32 newHead = 0;
PRT_UINT32 newTail = 0;
//
// Check from head to end of Array
//
while (oldHead < currEventQueueSize)
{
newQueue[newTail] = oldQueue[oldHead];
newTail++;
oldHead++;
}
//
// Reset Head to the start of Array
oldHead = 0;
//
// Check from start of Array till head
//
while (oldHead < oldTail)
{
newQueue[newTail] = oldQueue[oldHead];
newTail++;
oldHead++;
}
//Update the Queue
context->eventQueue.events = newQueue;
context->eventQueue.headIndex = newHead;
context->eventQueue.size = newTail - newHead;
context->eventQueue.tailIndex = newTail;
context->eventQueue.eventsSize = newQueueSize;
//Release the older Queue
PrtFree(oldQueue);
}
PRT_UINT32 *
PrtClonePackedSet(
_In_ PRT_UINT32 * packedSet,
_In_ PRT_UINT32 size
)
{
PRT_UINT32 *clone;
PRT_UINT32 i;
clone = (PRT_UINT32 *)PrtCalloc(size, sizeof(PRT_UINT32));
for (i = 0; i < size; i++)
{
clone[i] = packedSet[i];
}
return clone;
}
void PRT_CALL_CONV PrtSetFieldName(_Inout_ PRT_TYPE *tupleType, _In_ PRT_UINT32 index, _In_ PRT_STRING fieldName)
{
PrtAssert(PrtIsValidType(tupleType), "Invalid type expression");
PrtAssert(tupleType->typeKind == PRT_KIND_NMDTUP, "Invalid type expression");
PrtAssert(fieldName != NULL && *fieldName != '\0', "Invalid field name");
PrtAssert(index < tupleType->typeUnion.nmTuple->arity, "Invalid tuple index");
size_t nameLen;
PRT_STRING fieldNameClone;
nameLen = strnlen(fieldName, PRT_MAXFLDNAME_LENGTH);
PrtAssert(nameLen > 0 && nameLen < PRT_MAXFLDNAME_LENGTH, "Invalid field name");
fieldNameClone = (PRT_STRING)PrtCalloc(nameLen + 1, sizeof(PRT_CHAR));
strncpy(fieldNameClone, fieldName, nameLen);
fieldNameClone[nameLen] = '\0';
tupleType->typeUnion.nmTuple->fieldNames[index] = fieldNameClone;
}
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;
}