static gpointer
alloc_from_new_sb (MonoLockFreeAllocator *heap)
{
unsigned int slot_size, block_size, count, i;
Descriptor *desc = desc_alloc (heap->account_type);
slot_size = desc->slot_size = heap->sc->slot_size;
block_size = desc->block_size = heap->sc->block_size;
count = LOCK_FREE_ALLOC_SB_USABLE_SIZE (block_size) / slot_size;
desc->heap = heap;
/*
* Setting avail to 1 because 0 is the block we're allocating
* right away.
*/
desc->anchor.data.avail = 1;
desc->slot_size = heap->sc->slot_size;
desc->max_count = count;
desc->anchor.data.count = desc->max_count - 1;
desc->anchor.data.state = STATE_PARTIAL;
desc->sb = alloc_sb (desc);
/* Organize blocks into linked list. */
for (i = 1; i < count - 1; ++i)
*(unsigned int*)((char*)desc->sb + i * slot_size) = i + 1;
*(unsigned int*)((char*)desc->sb + (count - 1) * slot_size) = 0;
mono_memory_write_barrier ();
/* Make it active or free it again. */
if (mono_atomic_cas_ptr ((volatile gpointer *)&heap->active, desc, NULL) == NULL) {
return desc->sb;
} else {
desc->anchor.data.state = STATE_EMPTY;
desc_retire (desc);
return NULL;
}
}
static gpointer
alloc_from_new_sb (MonoLockFreeAllocator *heap)
{
unsigned int slot_size, count, i;
Descriptor *desc = desc_alloc ();
desc->sb = alloc_sb (desc);
slot_size = desc->slot_size = heap->sc->slot_size;
count = SB_USABLE_SIZE / slot_size;
/* Organize blocks into linked list. */
for (i = 1; i < count - 1; ++i)
*(unsigned int*)((char*)desc->sb + i * slot_size) = i + 1;
desc->heap = heap;
/*
* Setting avail to 1 because 0 is the block we're allocating
* right away.
*/
desc->anchor.data.avail = 1;
desc->slot_size = heap->sc->slot_size;
desc->max_count = count;
desc->anchor.data.count = desc->max_count - 1;
desc->anchor.data.state = STATE_PARTIAL;
mono_memory_write_barrier ();
/* Make it active or free it again. */
if (InterlockedCompareExchangePointer ((gpointer * volatile)&heap->active, desc, NULL) == NULL) {
return desc->sb;
} else {
desc->anchor.data.state = STATE_EMPTY;
desc_retire (desc);
return NULL;
}
}