/*
* get_mblock_from_alloc -- (internal) returns allocation memory block
*/
static struct memory_block
get_mblock_from_alloc(PMEMobjpool *pop, struct bucket *b,
struct allocation_header *alloc)
{
struct memory_block mblock = {
alloc->chunk_id,
alloc->zone_id,
bucket_calc_units(b, alloc->size),
calc_block_offset(pop, b, alloc)
};
return mblock;
}
/*
* prealloc_construct -- resizes an existing memory block with a constructor
*
* The block offset is written persistently into the off variable, but only
* after the constructor function has been called.
*
* If successful function returns zero. Otherwise an error number is returned.
*/
int
prealloc_construct(PMEMobjpool *pop, uint64_t *off, size_t size,
void (*constructor)(PMEMobjpool *pop, void *ptr, void *arg), void *arg,
uint64_t data_off)
{
if (size <= pmalloc_usable_size(pop, *off))
return 0;
size_t sizeh = size + sizeof (struct allocation_header);
int err = 0;
struct allocation_header *alloc = alloc_get_header(pop, *off);
struct bucket *b = heap_get_best_bucket(pop, alloc->size);
uint32_t add_size_idx = bucket_calc_units(b, sizeh - alloc->size);
uint32_t new_size_idx = bucket_calc_units(b, sizeh);
uint64_t real_size = new_size_idx * bucket_unit_size(b);
struct memory_block cnt = get_mblock_from_alloc(pop, b, alloc);
if ((err = heap_lock_if_run(pop, cnt)) != 0)
return err;
struct memory_block next = {0};
if ((err = heap_get_adjacent_free_block(pop, &next, cnt, 0)) != 0)
goto error;
if (next.size_idx < add_size_idx) {
err = ENOMEM;
goto error;
}
if ((err = heap_get_exact_block(pop, b, &next,
add_size_idx)) != 0)
goto error;
struct memory_block *blocks[2] = {&cnt, &next};
uint64_t op_result;
void *hdr;
struct memory_block m =
heap_coalesce(pop, blocks, 2, HEAP_OP_ALLOC, &hdr, &op_result);
void *block_data = heap_get_block_data(pop, m);
void *datap = block_data + sizeof (struct allocation_header);
if (constructor != NULL)
constructor(pop, datap + data_off, arg);
struct lane_section *lane;
if ((err = lane_hold(pop, &lane, LANE_SECTION_ALLOCATOR)) != 0)
goto error;
struct allocator_lane_section *sec =
(struct allocator_lane_section *)lane->layout;
redo_log_store(pop, sec->redo, ALLOC_OP_REDO_PTR_OFFSET,
pop_offset(pop, &alloc->size), real_size);
redo_log_store_last(pop, sec->redo, ALLOC_OP_REDO_HEADER,
pop_offset(pop, hdr), op_result);
redo_log_process(pop, sec->redo, MAX_ALLOC_OP_REDO);
if (lane_release(pop) != 0) {
ERR("Failed to release the lane");
ASSERT(0);
}
if (heap_unlock_if_run(pop, cnt) != 0) {
ERR("Failed to release run lock");
ASSERT(0);
}
return 0;
error:
if (heap_unlock_if_run(pop, cnt) != 0) {
ERR("Failed to release run lock");
ASSERT(0);
}
return err;
}
/*
* pmalloc_construct -- allocates a new block of memory with a constructor
*
* The block offset is written persistently into the off variable, but only
* after the constructor function has been called.
*
* If successful function returns zero. Otherwise an error number is returned.
*/
int
pmalloc_construct(PMEMobjpool *pop, uint64_t *off, size_t size,
void (*constructor)(PMEMobjpool *pop, void *ptr, void *arg),
void *arg, uint64_t data_off)
{
size_t sizeh = size + sizeof (struct allocation_header);
struct bucket *b = heap_get_best_bucket(pop, sizeh);
int err = 0;
uint32_t units = bucket_calc_units(b, sizeh);
struct memory_block m = {0, 0, units, 0};
if ((err = heap_get_bestfit_block(pop, b, &m)) != 0)
return err;
uint64_t op_result = 0;
void *block_data = heap_get_block_data(pop, m);
void *datap = block_data + sizeof (struct allocation_header);
ASSERT((uint64_t)block_data % _POBJ_CL_ALIGNMENT == 0);
uint64_t real_size = bucket_unit_size(b) * units;
alloc_write_header(pop, block_data, m.chunk_id, m.zone_id, real_size);
if (constructor != NULL)
constructor(pop, datap + data_off, arg);
if ((err = heap_lock_if_run(pop, m)) != 0)
return err;
void *hdr = heap_get_block_header(pop, m, HEAP_OP_ALLOC, &op_result);
struct lane_section *lane;
if ((err = lane_hold(pop, &lane, LANE_SECTION_ALLOCATOR)) != 0)
goto err_lane_hold;
struct allocator_lane_section *sec =
(struct allocator_lane_section *)lane->layout;
redo_log_store(pop, sec->redo, ALLOC_OP_REDO_PTR_OFFSET,
pop_offset(pop, off), pop_offset(pop, datap));
redo_log_store_last(pop, sec->redo, ALLOC_OP_REDO_HEADER,
pop_offset(pop, hdr), op_result);
redo_log_process(pop, sec->redo, MAX_ALLOC_OP_REDO);
if (lane_release(pop) != 0) {
ERR("Failed to release the lane");
ASSERT(0);
}
if (heap_unlock_if_run(pop, m) != 0) {
ERR("Failed to release run lock");
ASSERT(0);
}
return 0;
err_lane_hold:
if (heap_unlock_if_run(pop, m) != 0) {
ERR("Failed to release run lock");
ASSERT(0);
}
if (bucket_insert_block(b, m) != 0) {
ERR("Failed to recover heap volatile state");
ASSERT(0);
}
return err;
}
/*
* pmalloc_construct -- allocates a new block of memory with a constructor
*
* The block offset is written persistently into the off variable, but only
* after the constructor function has been called.
*
* If successful function returns zero. Otherwise an error number is returned.
*/
int
pmalloc_construct(PMEMobjpool *pop, uint64_t *off, size_t size,
void (*constructor)(PMEMobjpool *pop, void *ptr,
size_t usable_size, void *arg), void *arg, uint64_t data_off)
{
int err = 0;
struct lane_section *lane;
if ((err = lane_hold(pop, &lane, LANE_SECTION_ALLOCATOR)) != 0)
return err;
size_t sizeh = size + sizeof (struct allocation_header);
struct bucket *b = heap_get_best_bucket(pop, sizeh);
struct memory_block m = {0, 0, 0, 0};
m.size_idx = bucket_calc_units(b, sizeh);
err = heap_get_bestfit_block(pop, b, &m);
if (err == ENOMEM && !bucket_is_small(b))
goto out; /* there's only one huge bucket */
if (err == ENOMEM) {
/*
* There's no more available memory in the common heap and in
* this lane cache, fallback to the auxiliary (shared) bucket.
*/
b = heap_get_auxiliary_bucket(pop, sizeh);
err = heap_get_bestfit_block(pop, b, &m);
}
if (err == ENOMEM) {
/*
* The auxiliary bucket cannot satisfy our request, borrow
* memory from other caches.
*/
heap_drain_to_auxiliary(pop, b, m.size_idx);
err = heap_get_bestfit_block(pop, b, &m);
}
if (err == ENOMEM) {
/* we are completely out of memory */
goto out;
}
/*
* Now that the memory is reserved we can go ahead with making the
* allocation persistent.
*/
uint64_t real_size = bucket_unit_size(b) * m.size_idx;
err = persist_alloc(pop, lane, m, real_size, off,
constructor, arg, data_off);
out:
if (lane_release(pop) != 0) {
ERR("Failed to release the lane");
ASSERT(0);
}
return err;
}