void *
malloc(size_t size)
{
if (size == 0)
return NULL;
// align the size requirement to an 8 bytes boundary
size = (size + 7) & ~7;
restart:
if (size > sAvailable) {
// try to enlarge heap
if (grow_heap(size) < B_OK)
return NULL;
}
free_chunk *chunk = sFreeAnchor.next, *last = &sFreeAnchor;
while (chunk && chunk->Size() < size) {
last = chunk;
chunk = chunk->next;
}
if (chunk == NULL) {
// could not find a free chunk as large as needed
if (grow_heap(size) < B_OK)
return NULL;
goto restart;
}
if (chunk->Size() > size + sizeof(free_chunk) + 4) {
// if this chunk is bigger than the requested size,
// we split it to form two chunks (with a minimal
// size of 4 allocatable bytes).
free_chunk *freeChunk = chunk->Split(size);
last->next = freeChunk;
// re-enqueue the free chunk at the correct position
freeChunk->Remove(last);
freeChunk->Enqueue();
} else {
// remove the chunk from the free list
last->next = chunk->next;
}
sAvailable -= size + sizeof(uint32);
return chunk->AllocatedAddress();
}
void* __malloc_internal(size_t size)
{
size_t rounded_size;
size_t shifted_size;
void *address;
/* Round size to a power of two */
rounded_size = MINIMUM_BLOCK_SIZE;
for (shifted_size = (size + MALLOCED_HEADER_SIZE) / MINIMUM_BLOCK_SIZE;
shifted_size; shifted_size >>= 1)
rounded_size <<= 1;
assert(rounded_size >= size + MALLOCED_HEADER_SIZE);
address = find_free_block(rounded_size);
if (address == 0) {
grow_heap(rounded_size);
address = find_free_block(rounded_size);
if (address == 0)
return 0;
}
memset(address, ALLOC_FILL, rounded_size - MALLOCED_HEADER_SIZE);
allocated_blocks++;
total_allocations++;
total_allocated += rounded_size;
return address;
}
static void insert_node(pj_timer_heap_t *ht, pj_timer_entry *new_node)
{
if (ht->cur_size + 2 >= ht->max_size)
grow_heap(ht);
reheap_up( ht, new_node, ht->cur_size, HEAP_PARENT(ht->cur_size));
ht->cur_size++;
}
/* Return 0 if success, otherwise -1 is returned */
int heap_push(heap_t heap, void *elem) {
if (heap == NULL || elem == NULL)
return -1;
if (heap->curr == heap->avail && grow_heap(heap))
return -1;
heap_set(heap, ++heap->curr, elem);
bubble_up(heap, heap->curr);
return 0;
}
/* simple allocator to carve allocations out of an up-front allocated heap,
* so that we can free everything easily in one shot.
*/
void * ir3_alloc(struct ir3 *shader, int sz)
{
void *ptr;
sz = align(sz, 4) / 4;
if ((shader->heap_idx + sz) > CHUNK_SZ)
grow_heap(shader);
ptr = &shader->chunk->heap[shader->heap_idx];
shader->heap_idx += sz;
return ptr;
}
implicit_node* pq_insert( implicit_heap *queue, item_type item, key_type key )
{
implicit_node *node = pq_alloc_node( queue->map, 0 );
ITEM_ASSIGN( node->item, item );
node->key = key;
node->index = queue->size++;
#ifndef USE_EAGER
if( queue->size == queue->capacity )
grow_heap( queue );
#endif
queue->nodes[node->index] = node;
heapify_up( queue, node );
return node;
}
int ast_heap_push(struct ast_heap *h, void *elm)
#endif
{
if (h->cur_len == h->avail_len && grow_heap(h
#ifdef MALLOC_DEBUG
, file, lineno, func
#endif
)) {
return -1;
}
heap_set(h, ++(h->cur_len), elm);
bubble_up(h, h->cur_len);
return 0;
}
/// <summary>
/// Does what you'd expect the malloc C standard library to do, check
/// the requirements document for more details.
/// <summary>
/// <param name='size'> How many bytes the user needs to allocate </param>
/// <return>
/// A properely aligned pointer to a block of memory whose size at
/// is at least equal to the size requested by the caller.
/// </return>
void *my_malloc(size_t size)
{
uint8_t *user_data; /* The pointer we will return to the user */
uint8_t *new_block; /* Used to point to the block added by grow_heap */
uint8_t *sliced_block; /* Used to point to the left-over of a block */
struct block_header *header, *footer, *slice_header;
int slice_list;/* Which list the slice belongs to */
if(size <= 0)
return NULL;
size += sizeof(struct block_header) * 2; /* The header+footer */
size = (size+7) & ~7;/* Align the size to 8-byte boundary */
/* Identify which list to pick from */
int list_num = pick_list(size);
DEBUG_PRINT("size requested: %zd\n", size);
DEBUG_PRINT("List picked: %d\n", list_num);
user_data = extract_free_block(list_num, size);
/* If no list had enough space */
if(user_data == NULL) {
if((new_block = grow_heap(size)) == NULL) {
DEBUG_PRINT("%s\n", "-------------------------------------");
errno = ENOMEM;
return NULL;
}
add_free_block_to_list(list_num, new_block);
user_data = extract_free_block(list_num, size);
}
assert(user_data != NULL);
DEBUG_PRINT("%s\n", "Found a block!");
/* If we can slice, add the left-over back to our lists */
sliced_block = slice_block(user_data, size);
if(sliced_block != NULL) {
slice_header = (struct block_header *) sliced_block;
slice_list = pick_list(slice_header->block_size);
add_free_block_to_list(slice_list, sliced_block);
}
/* Mark the block as allocated */
header = (struct block_header *) user_data;
SET_ALLOC(header);
footer = get_footer(user_data);
SET_ALLOC(footer);
user_data = user_data + 8;/* Now points past the header */
DEBUG_PRINT("%s\n", "-------------------------------------");
return user_data;
}
struct ir3 * ir3_create(struct ir3_compiler *compiler,
unsigned nin, unsigned nout)
{
struct ir3 *shader = calloc(1, sizeof(struct ir3));
grow_heap(shader);
shader->compiler = compiler;
shader->ninputs = nin;
shader->inputs = ir3_alloc(shader, sizeof(shader->inputs[0]) * nin);
shader->noutputs = nout;
shader->outputs = ir3_alloc(shader, sizeof(shader->outputs[0]) * nout);
list_inithead(&shader->block_list);
list_inithead(&shader->array_list);
return shader;
}
int ast_heap_push(struct ast_heap *h, void *elm)
#endif
{
int i;
if (h->cur_len == h->avail_len && grow_heap(h
#ifdef MALLOC_DEBUG
, file, lineno, func
#endif
)) {
return -1;
}
heap_set(h, ++(h->cur_len), elm);
for (i = h->cur_len;
i > 1 && h->cmp_fn(heap_get(h, parent_node(i)), heap_get(h, i)) < 0;
i = parent_node(i)) {
heap_swap(h, i, parent_node(i));
}
return 0;
}