int dm_pool_grow_object(struct dm_pool *p, const void *extra, size_t delta)
{
struct chunk *c = p->chunk, *nc;
if (!delta)
delta = strlen(extra);
if (c->end - (c->begin + p->object_len) < delta) {
/* move into a new chunk */
if (p->object_len + delta > (p->chunk_size / 2))
nc = _new_chunk(p, (p->object_len + delta) * 2);
else
nc = _new_chunk(p, p->chunk_size);
if (!nc)
return 0;
_align_chunk(p->chunk, p->object_alignment);
memcpy(p->chunk->begin, c->begin, p->object_len);
c = p->chunk;
}
memcpy(c->begin + p->object_len, extra, delta);
p->object_len += delta;
return 1;
}
void *dm_pool_alloc_aligned(struct dm_pool *p, size_t s, unsigned alignment)
{
struct chunk *c = p->chunk;
void *r;
/* realign begin */
if (c)
_align_chunk(c, alignment);
/* have we got room ? */
if (!c || (c->begin > c->end) || (c->end - c->begin < s)) {
/* allocate new chunk */
size_t needed = s + alignment + sizeof(struct chunk);
c = _new_chunk(p, (needed > p->chunk_size) ?
needed : p->chunk_size);
if (!c)
return NULL;
_align_chunk(c, alignment);
}
r = c->begin;
c->begin += s;
#ifdef VALGRIND_POOL
VALGRIND_MAKE_MEM_UNDEFINED(r, s);
#endif
return r;
}
int dm_pool_begin_object(struct dm_pool *p, size_t hint)
{
struct chunk *c = p->chunk;
const size_t align = DEFAULT_ALIGNMENT;
p->object_len = 0;
p->object_alignment = align;
if (c)
_align_chunk(c, align);
if (!c || (c->begin > c->end) || (c->end - c->begin < hint)) {
/* allocate a new chunk */
c = _new_chunk(p,
hint > (p->chunk_size - sizeof(struct chunk)) ?
hint + sizeof(struct chunk) + align :
p->chunk_size);
if (!c)
return 0;
_align_chunk(c, align);
}
return 1;
}
int dm_pool_grow_object(struct dm_pool *p, const void *extra, size_t delta)
{
struct chunk *c = p->chunk, *nc;
if (!delta)
delta = strlen(extra);
if (c->end - (c->begin + p->object_len) < delta) {
/* move into a new chunk */
if (p->object_len + delta > (p->chunk_size / 2))
nc = _new_chunk(p, (p->object_len + delta) * 2);
else
nc = _new_chunk(p, p->chunk_size);
if (!nc)
return 0;
_align_chunk(p->chunk, p->object_alignment);
#ifdef VALGRIND_POOL
VALGRIND_MAKE_MEM_UNDEFINED(p->chunk->begin, p->object_len);
#endif
memcpy(p->chunk->begin, c->begin, p->object_len);
#ifdef VALGRIND_POOL
VALGRIND_MAKE_MEM_NOACCESS(c->begin, p->object_len);
#endif
c = p->chunk;
}
#ifdef VALGRIND_POOL
VALGRIND_MAKE_MEM_UNDEFINED(p->chunk->begin + p->object_len, delta);
#endif
memcpy(c->begin + p->object_len, extra, delta);
p->object_len += delta;
return 1;
}