static Boolean mspace_alloc_block(Mspace* mspace, Allocator* allocator)
{
alloc_context_reset(allocator);
/* now try to get a new block */
unsigned int old_free_idx = mspace->free_block_idx;
unsigned int new_free_idx = old_free_idx+1;
while( old_free_idx <= mspace->ceiling_block_idx ){
unsigned int allocated_idx = atomic_cas32(&mspace->free_block_idx, new_free_idx, old_free_idx);
if(allocated_idx != old_free_idx){
old_free_idx = mspace->free_block_idx;
new_free_idx = old_free_idx+1;
continue;
}
/* ok, got one */
Block_Header* alloc_block = (Block_Header*)&(mspace->blocks[allocated_idx - mspace->first_block_idx]);
allocator_init_free_block(allocator, alloc_block);
return TRUE;
}
/* Mspace is out. If it's caused by mutator, a collection should be triggered.
If it's caused by collector, a fallback should be triggered. */
return FALSE;
}
void gc_reset_mutator_context(GC* gc)
{
TRACE2("gc.process", "GC: reset mutator context ...\n");
Mutator *mutator = gc->mutator_list;
while (mutator) {
alloc_context_reset((Allocator*)mutator);
mutator = mutator->next;
}
return;
}
void mutator_destruct(GC* gc, void *unused_gc_information)
{
Mutator *mutator = (Mutator *)gc_get_tls();
alloc_context_reset((Allocator*)mutator);
lock(gc->mutator_list_lock); // vvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
#ifdef USE_UNIQUE_MARK_SWEEP_GC
allocactor_destruct_local_chunks((Allocator*)mutator);
#endif
mutator_register_new_obj_size(mutator);
volatile Mutator *temp = gc->mutator_list;
if (temp == mutator) { /* it is at the head of the list */
gc->mutator_list = temp->next;
} else {
while (temp->next != mutator) {
temp = temp->next;
assert(temp);
}
temp->next = mutator->next;
}
gc->num_mutators--;
unlock(gc->mutator_list_lock); // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
if(gc_is_gen_mode()){ /* put back the remset when a mutator exits */
pool_put_entry(gc->metadata->mutator_remset_pool, mutator->rem_set);
mutator->rem_set = NULL;
}
if(mutator->obj_with_fin){
pool_put_entry(gc->finref_metadata->obj_with_fin_pool, mutator->obj_with_fin);
mutator->obj_with_fin = NULL;
}
lock(mutator->dirty_set_lock);
if( mutator->dirty_set != NULL){
if(vector_block_is_empty(mutator->dirty_set))
pool_put_entry(gc->metadata->free_set_pool, mutator->dirty_set);
else{ /* FIXME:: this condition may be released. */
pool_put_entry(gc->metadata->gc_dirty_set_pool, mutator->dirty_set);
mutator->dirty_set = NULL;
}
}
unlock(mutator->dirty_set_lock);
STD_FREE(mutator);
gc_set_tls(NULL);
return;
}
