void
receiveSignal(tcb_t *thread, cap_t cap, bool_t isBlocking)
{
notification_t *ntfnPtr;
ntfnPtr = NTFN_PTR(cap_notification_cap_get_capNtfnPtr(cap));
switch (notification_ptr_get_state(ntfnPtr)) {
case NtfnState_Idle:
case NtfnState_Waiting: {
tcb_queue_t ntfn_queue;
if (isBlocking) {
/* Block thread on notification object */
thread_state_ptr_set_tsType(&thread->tcbState,
ThreadState_BlockedOnNotification);
thread_state_ptr_set_blockingObject(&thread->tcbState,
NTFN_REF(ntfnPtr));
scheduleTCB(thread);
/* Enqueue TCB */
ntfn_queue = ntfn_ptr_get_queue(ntfnPtr);
ntfn_queue = tcbEPAppend(thread, ntfn_queue);
notification_ptr_set_state(ntfnPtr, NtfnState_Waiting);
ntfn_ptr_set_queue(ntfnPtr, ntfn_queue);
} else {
doNBRecvFailedTransfer(thread);
}
break;
}
case NtfnState_Active:
setRegister(
thread, badgeRegister,
notification_ptr_get_ntfnMsgIdentifier(ntfnPtr));
notification_ptr_set_state(ntfnPtr, NtfnState_Idle);
break;
}
}
void
setThreadState(tcb_t *tptr, _thread_state_t ts)
{
thread_state_ptr_set_tsType(&tptr->tcbState, ts);
scheduleTCB(tptr);
}
void
sendIPC(bool_t blocking, bool_t do_call, word_t badge,
bool_t canGrant, tcb_t *thread, endpoint_t *epptr)
{
//printf("\n===in sendIPC funtion==\n");
switch (endpoint_ptr_get_state(epptr)) {
case EPState_Idle:
//printf("in case idle\n");
case EPState_Send:
//printf("in case send\n");
if (blocking) {
tcb_queue_t queue;
/* Set thread state to BlockedOnSend */
thread_state_ptr_set_tsType(&thread->tcbState,
ThreadState_BlockedOnSend);
thread_state_ptr_set_blockingIPCEndpoint(
&thread->tcbState, EP_REF(epptr));
thread_state_ptr_set_blockingIPCBadge(
&thread->tcbState, badge);
thread_state_ptr_set_blockingIPCCanGrant(
&thread->tcbState, canGrant);
thread_state_ptr_set_blockingIPCIsCall(
&thread->tcbState, do_call);
scheduleTCB(thread);
/* Place calling thread in endpoint queue */
queue = ep_ptr_get_queue(epptr);
queue = tcbEPAppend(thread, queue);
endpoint_ptr_set_state(epptr, EPState_Send);
ep_ptr_set_queue(epptr, queue);
}
break;
case EPState_Recv: {
tcb_queue_t queue;
tcb_t *dest;
bool_t diminish;
//printf("in case recv\n");
/* Get the head of the endpoint queue. */
queue = ep_ptr_get_queue(epptr);
dest = queue.head;
/* Haskell error "Receive endpoint queue must not be empty" */
assert(dest);
/* Dequeue the first TCB */
queue = tcbEPDequeue(dest, queue);
ep_ptr_set_queue(epptr, queue);
if (!queue.head) {
endpoint_ptr_set_state(epptr, EPState_Idle);
}
/* Do the transfer */
diminish =
thread_state_get_blockingIPCDiminishCaps(dest->tcbState);
doIPCTransfer(thread, epptr, badge, canGrant, dest, diminish);
setThreadState(dest, ThreadState_Running);
attemptSwitchTo(dest);
//printf("the dest thread's prio is %d\n", dest->tcbPriority);
if (do_call ||
fault_ptr_get_faultType(&thread->tcbFault) != fault_null_fault) {
if (canGrant && !diminish) {
setupCallerCap(thread, dest);
} else {
setThreadState(thread, ThreadState_Inactive);
}
}
break;
}
}
}
void
receiveIPC(tcb_t *thread, cap_t cap)
{
endpoint_t *epptr;
bool_t diminish;
async_endpoint_t *aepptr;
/* Haskell error "receiveIPC: invalid cap" */
assert(cap_get_capType(cap) == cap_endpoint_cap);
//printf("\n;;;;;;;;;In function receiveIPC;;;;;;;\n");
epptr = EP_PTR(cap_endpoint_cap_get_capEPPtr(cap));
diminish = !cap_endpoint_cap_get_capCanSend(cap);
/* Check for anything waiting in the async endpoint*/
aepptr = thread->boundAsyncEndpoint;
if (aepptr && async_endpoint_ptr_get_state(aepptr) == AEPState_Active)
{
completeAsyncIPC(aepptr, thread);
}
else
{
switch (endpoint_ptr_get_state(epptr)) {
case EPState_Idle:
//printf("in case idle\n");
case EPState_Recv: {
tcb_queue_t queue;
//printf("in case recv\n");
/* Set thread state to BlockedOnReceive */
thread_state_ptr_set_tsType(&thread->tcbState,
ThreadState_BlockedOnReceive);
thread_state_ptr_set_blockingIPCEndpoint(
&thread->tcbState, EP_REF(epptr));
thread_state_ptr_set_blockingIPCDiminishCaps(
&thread->tcbState, diminish);
scheduleTCB(thread);
/* Place calling thread in endpoint queue */
queue = ep_ptr_get_queue(epptr);
queue = tcbEPAppend(thread, queue);
endpoint_ptr_set_state(epptr, EPState_Recv);
ep_ptr_set_queue(epptr, queue);
break;
}
case EPState_Send: {
tcb_queue_t queue;
tcb_t *sender;
word_t badge;
bool_t canGrant;
bool_t do_call;
//printf("in case send\n");
/* Get the head of the endpoint queue. */
queue = ep_ptr_get_queue(epptr);
sender = queue.head;
/* Haskell error "Send endpoint queue must not be empty" */
assert(sender);
/* Dequeue the first TCB */
queue = tcbEPDequeue(sender, queue);
ep_ptr_set_queue(epptr, queue);
if (!queue.head) {
endpoint_ptr_set_state(epptr, EPState_Idle);
}
/* Get sender IPC details */
badge = thread_state_ptr_get_blockingIPCBadge(&sender->tcbState);
canGrant =
thread_state_ptr_get_blockingIPCCanGrant(&sender->tcbState);
/* Do the transfer */
doIPCTransfer(sender, epptr, badge,
canGrant, thread, diminish);
do_call = thread_state_ptr_get_blockingIPCIsCall(&sender->tcbState);
if (do_call ||
fault_get_faultType(sender->tcbFault) != fault_null_fault) {
if (canGrant && !diminish) {
setupCallerCap(sender, thread);
} else {
setThreadState(sender, ThreadState_Inactive);
}
} else {
setThreadState(sender, ThreadState_Running);
switchIfRequiredTo(sender);
}
break;
}
}
}
}
void
sendIPC(bool_t blocking, bool_t do_call, word_t badge,
bool_t canGrant, tcb_t *thread, endpoint_t *epptr)
{
switch (endpoint_ptr_get_state(epptr)) {
case EPState_Idle:
case EPState_Send:
if (blocking) {
tcb_queue_t queue;
/* Set thread state to BlockedOnSend */
thread_state_ptr_set_tsType(&thread->tcbState,
ThreadState_BlockedOnSend);
thread_state_ptr_set_blockingObject(
&thread->tcbState, EP_REF(epptr));
thread_state_ptr_set_blockingIPCBadge(
&thread->tcbState, badge);
thread_state_ptr_set_blockingIPCCanGrant(
&thread->tcbState, canGrant);
thread_state_ptr_set_blockingIPCIsCall(
&thread->tcbState, do_call);
scheduleTCB(thread);
/* Place calling thread in endpoint queue */
queue = ep_ptr_get_queue(epptr);
queue = tcbEPAppend(thread, queue);
endpoint_ptr_set_state(epptr, EPState_Send);
ep_ptr_set_queue(epptr, queue);
}
break;
case EPState_Recv: {
tcb_queue_t queue;
tcb_t *dest;
/* Get the head of the endpoint queue. */
queue = ep_ptr_get_queue(epptr);
dest = queue.head;
/* Haskell error "Receive endpoint queue must not be empty" */
assert(dest);
/* Dequeue the first TCB */
queue = tcbEPDequeue(dest, queue);
ep_ptr_set_queue(epptr, queue);
if (!queue.head) {
endpoint_ptr_set_state(epptr, EPState_Idle);
}
/* Do the transfer */
doIPCTransfer(thread, epptr, badge, canGrant, dest);
setThreadState(dest, ThreadState_Running);
attemptSwitchTo(dest);
if (do_call ||
seL4_Fault_ptr_get_seL4_FaultType(&thread->tcbFault) != seL4_Fault_NullFault) {
if (canGrant) {
setupCallerCap(thread, dest);
} else {
setThreadState(thread, ThreadState_Inactive);
}
}
break;
}
}
}
void
receiveIPC(tcb_t *thread, cap_t cap, bool_t isBlocking)
{
endpoint_t *epptr;
notification_t *ntfnPtr;
/* Haskell error "receiveIPC: invalid cap" */
assert(cap_get_capType(cap) == cap_endpoint_cap);
epptr = EP_PTR(cap_endpoint_cap_get_capEPPtr(cap));
/* Check for anything waiting in the notification */
ntfnPtr = thread->tcbBoundNotification;
if (ntfnPtr && notification_ptr_get_state(ntfnPtr) == NtfnState_Active) {
completeSignal(ntfnPtr, thread);
} else {
switch (endpoint_ptr_get_state(epptr)) {
case EPState_Idle:
case EPState_Recv: {
tcb_queue_t queue;
if (isBlocking) {
/* Set thread state to BlockedOnReceive */
thread_state_ptr_set_tsType(&thread->tcbState,
ThreadState_BlockedOnReceive);
thread_state_ptr_set_blockingObject(
&thread->tcbState, EP_REF(epptr));
scheduleTCB(thread);
/* Place calling thread in endpoint queue */
queue = ep_ptr_get_queue(epptr);
queue = tcbEPAppend(thread, queue);
endpoint_ptr_set_state(epptr, EPState_Recv);
ep_ptr_set_queue(epptr, queue);
} else {
doNBRecvFailedTransfer(thread);
}
break;
}
case EPState_Send: {
tcb_queue_t queue;
tcb_t *sender;
word_t badge;
bool_t canGrant;
bool_t do_call;
/* Get the head of the endpoint queue. */
queue = ep_ptr_get_queue(epptr);
sender = queue.head;
/* Haskell error "Send endpoint queue must not be empty" */
assert(sender);
/* Dequeue the first TCB */
queue = tcbEPDequeue(sender, queue);
ep_ptr_set_queue(epptr, queue);
if (!queue.head) {
endpoint_ptr_set_state(epptr, EPState_Idle);
}
/* Get sender IPC details */
badge = thread_state_ptr_get_blockingIPCBadge(&sender->tcbState);
canGrant =
thread_state_ptr_get_blockingIPCCanGrant(&sender->tcbState);
/* Do the transfer */
doIPCTransfer(sender, epptr, badge,
canGrant, thread);
do_call = thread_state_ptr_get_blockingIPCIsCall(&sender->tcbState);
if (do_call ||
seL4_Fault_get_seL4_FaultType(sender->tcbFault) != seL4_Fault_NullFault) {
if (canGrant) {
setupCallerCap(sender, thread);
} else {
setThreadState(sender, ThreadState_Inactive);
}
} else {
setThreadState(sender, ThreadState_Running);
switchIfRequiredTo(sender);
}
break;
}
}
}
}
