void
ipcCancel(tcb_t *tptr)
{
thread_state_t *state = &tptr->tcbState;
switch (thread_state_ptr_get_tsType(state)) {
case ThreadState_BlockedOnSend:
case ThreadState_BlockedOnReceive: {
/* blockedIPCCancel state */
endpoint_t *epptr;
tcb_queue_t queue;
epptr = EP_PTR(thread_state_ptr_get_blockingIPCEndpoint(state));
/* Haskell error "blockedIPCCancel: endpoint must not be idle" */
assert(endpoint_ptr_get_state(epptr) != EPState_Idle);
/* Dequeue TCB */
queue = ep_ptr_get_queue(epptr);
queue = tcbEPDequeue(tptr, queue);
ep_ptr_set_queue(epptr, queue);
if (!queue.head) {
endpoint_ptr_set_state(epptr, EPState_Idle);
}
setThreadState(tptr, ThreadState_Inactive);
break;
}
case ThreadState_BlockedOnAsyncEvent:
asyncIPCCancel(tptr,
AEP_PTR(thread_state_ptr_get_blockingIPCEndpoint(state)));
break;
case ThreadState_BlockedOnReply: {
cte_t *slot, *callerCap;
fault_null_fault_ptr_new(&tptr->tcbFault);
/* Get the reply cap slot */
slot = TCB_PTR_CTE_PTR(tptr, tcbReply);
callerCap = CTE_PTR(cap_reply_cap_get_capCallerSlot(slot->cap));
if (callerCap) {
finaliseCap(callerCap->cap, true, true);
callerCap->cap = cap_null_cap_new();
}
cap_reply_cap_ptr_set_capCallerSlot(&slot->cap, CTE_REF(NULL));
break;
}
}
}
void
cancelIPC(tcb_t *tptr)
{
thread_state_t *state = &tptr->tcbState;
switch (thread_state_ptr_get_tsType(state)) {
case ThreadState_BlockedOnSend:
case ThreadState_BlockedOnReceive: {
/* blockedIPCCancel state */
endpoint_t *epptr;
tcb_queue_t queue;
epptr = EP_PTR(thread_state_ptr_get_blockingObject(state));
/* Haskell error "blockedIPCCancel: endpoint must not be idle" */
assert(endpoint_ptr_get_state(epptr) != EPState_Idle);
/* Dequeue TCB */
queue = ep_ptr_get_queue(epptr);
queue = tcbEPDequeue(tptr, queue);
ep_ptr_set_queue(epptr, queue);
if (!queue.head) {
endpoint_ptr_set_state(epptr, EPState_Idle);
}
setThreadState(tptr, ThreadState_Inactive);
break;
}
case ThreadState_BlockedOnNotification:
cancelSignal(tptr,
NTFN_PTR(thread_state_ptr_get_blockingObject(state)));
break;
case ThreadState_BlockedOnReply: {
cte_t *slot, *callerCap;
tptr->tcbFault = seL4_Fault_NullFault_new();
/* Get the reply cap slot */
slot = TCB_PTR_CTE_PTR(tptr, tcbReply);
callerCap = CTE_PTR(mdb_node_get_mdbNext(slot->cteMDBNode));
if (callerCap) {
/** GHOSTUPD: "(True,
gs_set_assn cteDeleteOne_'proc (ucast cap_reply_cap))" */
cteDeleteOne(callerCap);
}
break;
}
}
}
void
epCancelBadgedSends(endpoint_t *epptr, word_t badge)
{
switch (endpoint_ptr_get_state(epptr)) {
case EPState_Idle:
case EPState_Recv:
break;
case EPState_Send: {
tcb_t *thread, *next;
tcb_queue_t queue = ep_ptr_get_queue(epptr);
/* this is a de-optimisation for verification
* reasons. it allows the contents of the endpoint
* queue to be ignored during the for loop. */
endpoint_ptr_set_state(epptr, EPState_Idle);
endpoint_ptr_set_epQueue_head(epptr, 0);
endpoint_ptr_set_epQueue_tail(epptr, 0);
for (thread = queue.head; thread; thread = next) {
word_t b = thread_state_ptr_get_blockingIPCBadge(
&thread->tcbState);
next = thread->tcbEPNext;
if (b == badge) {
setThreadState(thread, ThreadState_Restart);
tcbSchedEnqueue(thread);
queue = tcbEPDequeue(thread, queue);
}
}
ep_ptr_set_queue(epptr, queue);
if (queue.head) {
endpoint_ptr_set_state(epptr, EPState_Send);
}
rescheduleRequired();
break;
}
default:
fail("invalid EP state");
}
}
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;
}
}
}
}
