void
v_dataViewInstanceWipe(
v_dataViewInstance instance)
{
v_dataViewSample sample,prev,firstSample;
if (instance == NULL) {
return;
}
assert (C_TYPECHECK (instance, v_dataViewInstance));
CHECK_INSTANCE(instance);
if (instance->sampleCount != 0) {
sample = v_dataViewInstanceTemplate(instance)->sample;
firstSample = c_keep(sample);
while (sample != NULL) {
v_dataViewSampleListRemove(v_dataViewSampleList(sample));
prev = sample->prev;
sample->prev = NULL;
c_free(sample);
sample = prev;
}
instance->sampleCount = 0;
v_dataViewInstanceTemplate(instance)->sample = firstSample;
}
CHECK_ZERO_INSTANCE(instance);
}
static c_bool
evalInstanceQuery(
v_dataViewSample sample,
c_voidp arg)
{
v_instanceQueryArg instanceQueryArg = (v_instanceQueryArg)arg;
c_query query = instanceQueryArg->query;
v_dataViewInstance instance = instanceQueryArg->instance;
v_dataViewSample firstSample;
c_bool result;
assert(query != NULL);
/* The history samples are swapped with the first sample to make
* sample-evaluation on instance level work.
*/
firstSample = v_dataViewInstanceTemplate(instance)->sample;
if (sample != firstSample) {
v_dataViewInstanceTemplate(instance)->sample = sample;
}
result = c_queryEval(query,instance);
if (sample != firstSample) {
v_dataViewInstanceTemplate(instance)->sample = firstSample;
}
return result;
}
c_bool
v_dataViewInstanceTest(
v_dataViewInstance instance,
c_query query,
v_state sampleMask,
v_queryAction action,
c_voidp args)
{
v_dataViewSample sample, firstSample;
c_bool sampleSatisfies = FALSE;
assert(C_TYPECHECK(instance,v_dataViewInstance));
CHECK_INSTANCE(instance);
if (instance == NULL) {
return FALSE;
}
if (instance->sampleCount == 0) {
return TRUE;
}
firstSample = v_dataViewInstanceTemplate(instance)->sample;
assert (firstSample != NULL);
sample = firstSample;
while (sample != NULL && sampleSatisfies == FALSE) {
/* The history samples are swapped with the first sample to make
* sample-evaluation on instance level work.
*/
if (v_sampleMaskPass(sampleMask, sample)) {
if (query) {
if (sample != firstSample) {
v_dataViewInstanceTemplate(instance)->sample = sample;
}
sampleSatisfies = c_queryEval(query,instance);
if (sample != firstSample) {
v_dataViewInstanceTemplate(instance)->sample = firstSample;
}
} else {
sampleSatisfies = TRUE;
}
}
/* If a sample passed the query, then check whether it matches the
* optional condition passed by the action routine. (This condition
* can for example check for matching lifecycle states.)
*/
if (sampleSatisfies && action != NULL) {
sampleSatisfies = action(sample, args);
}
sample = sample->prev;
}
CHECK_INSTANCE(instance);
return sampleSatisfies;
}
void
v_dataViewInstanceWrite(
v_dataViewInstance instance,
v_dataViewSample sample,
v_dataViewSample position)
{
v_dataViewSample head, *sampleptr;
assert (instance != NULL && C_TYPECHECK (instance, v_dataViewInstance));
assert (sample != NULL && C_TYPECHECK (sample, v_dataViewSample));
if (position != NULL) {
assert (C_TYPECHECK (position, v_dataViewSample));
}
head = v_dataViewInstanceTemplate(instance)->sample;
/* Keep alive view sample must be discarded, but only after the new
* view sample is inserted.
*/
if (instance->sampleCount == 0) {
assert (position == NULL);
assert(head == NULL);
sampleptr = &v_dataViewInstanceTemplate(instance)->sample;
sample->next = sample;
sample->prev = NULL;
(*sampleptr) = sample;
} else if (position == NULL) {
assert(head);
/* "normal" use case, append sample to list */
sampleptr = (v_dataViewSample *)&head->next;
sample->next = (*sampleptr);
sample->prev = NULL;
(*sampleptr)->prev = sample;
(*sampleptr) = sample;
} else {
assert (position->next != NULL);
assert(head);
sample->next = position->next;
if (position == head) {
sampleptr = &v_dataViewInstanceTemplate(instance)->sample;
/* verify previous pointer of tail sample is correct */
assert (v_dataViewSample(head->next)->prev == NULL);
(*sampleptr)->next = sample;
} else {
sampleptr = (v_dataViewSample *)&position->next;
(*sampleptr)->prev = sample;
}
sample->prev = position;
(*sampleptr) = sample;
}
instance->sampleCount++;
}
c_bool
v_dataViewInstanceReadSamples(
v_dataViewInstance instance,
c_query query,
v_state sampleMask,
v_readerSampleAction action,
c_voidp arg)
{
v_dataViewSample sample, firstSample;
v_actionResult result = V_PROCEED;
c_bool sampleSatisfies = FALSE;
assert(C_TYPECHECK(instance,v_dataViewInstance));
CHECK_INSTANCE(instance);
if (instance == NULL) {
return v_actionResultTest(result, V_PROCEED);
}
if (instance->sampleCount == 0) {
return v_actionResultTest(result, V_PROCEED);
}
firstSample = v_dataViewInstanceTemplate(instance)->sample;
assert (firstSample != NULL);
sample = firstSample;
while (sample != NULL && v_actionResultTest(result, V_PROCEED)) {
if (v_sampleMaskPass(sampleMask, sample)) {
if (query != NULL) {
/* The history samples are swapped with the first sample to make
* sample-evaluation on instance level work.
*/
if (sample != firstSample) {
v_dataViewInstanceTemplate(instance)->sample = sample;
}
sampleSatisfies = c_queryEval(query,instance);
if (sample != firstSample) {
v_dataViewInstanceTemplate(instance)->sample = firstSample;
}
} else {
sampleSatisfies = TRUE;
}
}
if (sampleSatisfies) {
result = v_dataViewSampleReadTake(sample, action, arg, FALSE);
}
sample = sample->prev;
}
CHECK_INSTANCE(instance);
return v_actionResultTest(result, V_PROCEED);
}
v_dataViewInstance
v_dataViewInstanceNew(
v_dataView dataView,
v_dataViewSample viewSample)
{
v_dataViewInstance instance;
assert(dataView);
assert(viewSample);
assert(C_TYPECHECK(dataView,v_dataView));
assert(C_TYPECHECK(viewSample,v_dataViewSample));
instance = v_dataViewInstance(c_new(dataView->instanceType));
if (instance) {
v_object(instance)->kernel = v_objectKernel(dataView);
v_objectKind(instance) = K_DATAVIEWINSTANCE;
v_instanceInit(v_instance(instance), v_entity(dataView));
viewSample->next = viewSample;
v_dataViewInstanceTemplate(instance)->sample = viewSample;
instance->sampleCount = 1;
v_stateSet(v_instanceState(instance),L_NEW);
v_stateClear(v_readerSample(viewSample)->sampleState,L_READ);
assert(C_TYPECHECK(instance,v_dataViewInstance));
CHECK_INSTANCE(instance);
} else {
OS_REPORT(OS_FATAL, OS_FUNCTION, V_RESULT_INTERNAL_ERROR,
"Failed to allocate v_dataViewInstance");
assert(FALSE);
}
return instance;
}
void
v_dataViewSampleRemove(
v_dataViewSample sample)
{
v_dataViewInstance instance;
assert(C_TYPECHECK(sample,v_dataViewSample));
instance = v_dataViewInstance(v_readerSample(sample)->instance);
CHECK_INSTANCE(instance);
if (instance->sampleCount > 1) {
if (sample->next != NULL) {
v_dataViewSample(sample->next)->prev = sample->prev;
} else {
v_dataViewInstanceTemplate(instance)->sample = sample->prev;
}
if (sample->prev != NULL) {
v_dataViewSample(sample->prev)->next = sample->next;
}
sample->prev = NULL;
sample->next = NULL;
c_free(sample);
}
instance->sampleCount--;
if (instance->sampleCount > 0) {
CHECK_INSTANCE(instance);
} else {
CHECK_ZERO_INSTANCE(instance);
}
}
void
v_dataViewInstanceWalkSamples(
v_dataViewInstance instance,
v_readerSampleAction action,
c_voidp arg)
{
v_dataViewSample sample;
c_bool proceed = TRUE;
assert(C_TYPECHECK(instance,v_dataViewInstance));
CHECK_INSTANCE(instance);
if (instance == NULL) {
return;
}
if (instance->sampleCount == 0) {
return;
}
sample = v_dataViewInstanceTemplate(instance)->sample;
while ((sample != NULL) && (proceed == TRUE)) {
proceed = action(v_readerSample(sample),arg);
sample = sample->prev;
}
CHECK_INSTANCE(instance);
}
static c_bool
v_dataViewInstanceTakeWithCondition(
v_dataViewInstance instance,
v_sampleCondition condition,
c_voidp conditionArg,
v_state sampleMask,
v_readerSampleAction action,
c_voidp actionArg)
{
v_dataViewSample sample, previous;
c_bool proceed = TRUE;
c_bool sampleSatisfies = FALSE;
assert(C_TYPECHECK(instance,v_dataViewInstance));
CHECK_INSTANCE(instance);
if (instance == NULL) {
return proceed;
}
if (instance->sampleCount == 0) {
return proceed;
}
sample = v_dataViewInstanceTemplate(instance)->sample;
assert (sample != NULL);
while (proceed == TRUE && sample != NULL) {
if (v_sampleMaskPass(sampleMask, sample)) {
if (condition != NULL) {
sampleSatisfies = condition(sample, conditionArg);
} else {
sampleSatisfies = TRUE;
}
}
previous = sample->prev;
if (sampleSatisfies) {
proceed = v_actionResultTest(v_dataViewSampleReadTake(sample, action, actionArg, TRUE), V_PROCEED);
}
sample = previous;
}
if (instance->sampleCount > 0) {
CHECK_INSTANCE(instance);
} else {
CHECK_ZERO_INSTANCE(instance);
}
return proceed;
}
v_dataViewInstance
v_dataViewInstanceNew(
v_dataView dataView,
v_readerSample sample)
{
v_dataViewInstance instance;
v_dataViewSample viewSample;
assert(dataView);
assert(sample);
assert(C_TYPECHECK(dataView,v_dataView));
assert(C_TYPECHECK(sample,v_readerSample));
instance = v_dataViewInstance(c_new(dataView->instanceType));
if (instance) {
v_object(instance)->kernel = v_objectKernel(dataView);
v_objectKind(instance) = K_DATAVIEWINSTANCE;
instance->dataView = (c_voidp)dataView;
viewSample = v_dataViewSampleNew(instance,sample);
if (viewSample) {
v_dataViewInstanceTemplate(instance)->sample = viewSample;
viewSample->next = NULL;
viewSample->prev = NULL;
v_readerSampleAddViewSample(sample,viewSample);
instance->sampleCount = 1;
v_stateSet(instance->instanceState,L_NEW);
v_stateClear(v_readerSample(viewSample)->sampleState,L_READ);
assert(C_TYPECHECK(instance,v_dataViewInstance));
v_dataViewNotifyDataAvailable(dataView, viewSample);
}
CHECK_INSTANCE(instance);
} else {
OS_REPORT(OS_ERROR,
"v_dataViewInstanceNew",0,
"Failed to allocate v_dataViewInstancem");
assert(FALSE);
}
return instance;
}
void
checkInstance(
v_dataViewInstance instance,
c_bool isNotEmpty)
{
int i = 0;
v_dataViewSample current;
v_dataViewSample next;
if (instance) {
if (!isNotEmpty) {
REL_ASSERT(instance->sampleCount == 0);
}
if (!v_reader(v_dataViewReader(instance->dataView))->qos->userKey.enable && isNotEmpty) {
REL_ASSERT(instance->sampleCount == 1);
}
REL_ASSERT(c_refCount(instance) > 0);
REL_ASSERT(C_TYPECHECK(instance, v_dataViewInstance));
next = NULL;
current = v_dataViewInstanceTemplate(instance)->sample;
while (current != NULL) {
if (!isNotEmpty) {
checkSample(current);
}
REL_ASSERT(current->next == next);
if (next != NULL) {
REL_ASSERT(next->prev == current);
}
next = current;
current = current->prev;
i++;
}
if (next != NULL) {
REL_ASSERT(next->prev == current);
}
if (isNotEmpty) {
REL_ASSERT(i == instance->sampleCount);
} else {
REL_ASSERT(i == 1);
}
}
}
v_writeResult
v_dataViewInstanceWrite (
v_dataViewInstance instance,
v_readerSample sample)
{
v_dataViewSample viewSample;
v_dataViewSample *prev;
v_dataViewSample next;
assert(C_TYPECHECK(instance,v_dataViewInstance));
assert(C_TYPECHECK(sample,v_readerSample));
CHECK_INSTANCE(instance);
viewSample = v_dataViewSampleNew(instance,sample);
if (viewSample) {
viewSample->next = NULL;
prev = &v_dataViewInstanceTemplate(instance)->sample;
next = NULL;
while (*prev) {
next = *prev;
prev = &(*prev)->prev;
}
*prev = viewSample;
viewSample->next = next;
v_readerSampleAddViewSample(sample,viewSample);
instance->sampleCount++;
assert(c_refCount(viewSample) == 1);
v_dataViewNotifyDataAvailable(v_dataView(instance->dataView), viewSample);
}
CHECK_INSTANCE(instance);
return V_WRITE_SUCCESS;
}