void
SystemProfiler::_WaitObjectUsed(addr_t object, uint32 type)
{
// look up the object
WaitObjectKey key;
key.object = object;
key.type = type;
WaitObject* waitObject = fWaitObjectTable.Lookup(key);
// If already known, re-queue it as most recently used and be done.
if (waitObject != NULL) {
fUsedWaitObjects.Remove(waitObject);
fUsedWaitObjects.Add(waitObject);
return;
}
// not known yet -- get the info
const char* name = NULL;
const void* referencedObject = NULL;
switch (type) {
case THREAD_BLOCK_TYPE_SEMAPHORE:
{
name = sem_get_name_unsafe((sem_id)object);
break;
}
case THREAD_BLOCK_TYPE_CONDITION_VARIABLE:
{
ConditionVariable* variable = (ConditionVariable*)object;
name = variable->ObjectType();
referencedObject = variable->Object();
break;
}
case THREAD_BLOCK_TYPE_MUTEX:
{
mutex* lock = (mutex*)object;
name = lock->name;
break;
}
case THREAD_BLOCK_TYPE_RW_LOCK:
{
rw_lock* lock = (rw_lock*)object;
name = lock->name;
break;
}
case THREAD_BLOCK_TYPE_OTHER:
{
name = (const char*)(void*)object;
break;
}
case THREAD_BLOCK_TYPE_SNOOZE:
case THREAD_BLOCK_TYPE_SIGNAL:
default:
return;
}
// add the event
size_t nameLen = name != NULL ? strlen(name) : 0;
system_profiler_wait_object_info* event
= (system_profiler_wait_object_info*)
_AllocateBuffer(sizeof(system_profiler_wait_object_info) + nameLen,
B_SYSTEM_PROFILER_WAIT_OBJECT_INFO, 0, 0);
if (event == NULL)
return;
event->type = type;
event->object = object;
event->referenced_object = (addr_t)referencedObject;
if (name != NULL)
strcpy(event->name, name);
else
event->name[0] = '\0';
fHeader->size = fBufferSize;
// add the wait object
// get a free one or steal the least recently used one
waitObject = fFreeWaitObjects.RemoveHead();
if (waitObject == NULL) {
waitObject = fUsedWaitObjects.RemoveHead();
fWaitObjectTable.RemoveUnchecked(waitObject);
}
waitObject->object = object;
waitObject->type = type;
fWaitObjectTable.InsertUnchecked(waitObject);
fUsedWaitObjects.Add(waitObject);
}
