int PtrQueueSet::completed_buffers_list_length() {
int n = 0;
BufferNode* cbn = _completed_buffers_head;
while (cbn != NULL) {
n++;
cbn = cbn->next();
}
return n;
}
void DirtyCardQueueSet::apply_closure_to_all_completed_buffers() {
BufferNode* nd = _completed_buffers_head;
while (nd != NULL) {
bool b =
DirtyCardQueue::apply_closure_to_buffer(_closure,
BufferNode::make_buffer_from_node(nd),
0, _sz, false);
guarantee(b, "Should not stop early.");
nd = nd->next();
}
}
// Deallocates any completed log buffers
void DirtyCardQueueSet::clear() {
BufferNode* buffers_to_delete = NULL;
{
MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag);
while (_completed_buffers_head != NULL) {
BufferNode* nd = _completed_buffers_head;
_completed_buffers_head = nd->next();
nd->set_next(buffers_to_delete);
buffers_to_delete = nd;
}
_n_completed_buffers = 0;
_completed_buffers_tail = NULL;
DEBUG_ONLY(assert_completed_buffer_list_len_correct_locked());
}
while (buffers_to_delete != NULL) {
BufferNode* nd = buffers_to_delete;
buffers_to_delete = nd->next();
deallocate_buffer(nd);
}
}
void DirtyCardQueueSet::par_apply_closure_to_all_completed_buffers(CardTableEntryClosure* cl) {
BufferNode* nd = _cur_par_buffer_node;
while (nd != NULL) {
BufferNode* next = nd->next();
void* actual = Atomic::cmpxchg_ptr(next, &_cur_par_buffer_node, nd);
if (actual == nd) {
bool b = apply_closure_to_buffer(cl, nd, false);
guarantee(b, "Should not stop early.");
nd = next;
} else {
nd = static_cast<BufferNode*>(actual);
}
}
}
BufferNode*
DirtyCardQueueSet::get_completed_buffer(int stop_at) {
BufferNode* nd = NULL;
MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag);
if ((int)_n_completed_buffers <= stop_at) {
_process_completed = false;
return NULL;
}
if (_completed_buffers_head != NULL) {
nd = _completed_buffers_head;
_completed_buffers_head = nd->next();
if (_completed_buffers_head == NULL)
_completed_buffers_tail = NULL;
_n_completed_buffers--;
assert(_n_completed_buffers >= 0, "Invariant");
}
debug_only(assert_completed_buffer_list_len_correct_locked());
return nd;
}