void * pool_allocate(size_t size)
{
// get pool
struct pool *p = get_pool(size);
struct slot *slot;
/* locate free slot or expand */
// use next slot
if (p->slots != p->cursor)
{
debug("ALLOCATE", "allocating unused slot %d", p->cursor);
slot = pool_create_slot(p, p->cursor++);
}
// use a freed slot
else if (p->freed->size > 0)
{
slot = (struct slot *) queue_pop(p->freed);
debug("ALLOCATE", "reallocating existing slot %d", slot->index);
}
// need to expand
else
{
debug("ALLOCATE", "no more slots in pool %d, expanding", p->size);
pool_expand(p);
slot = pool_create_slot(p, p->cursor++);
}
return (void *) ((char *) slot) + headerlen;
}
static void* pool_malloc(size_t sz)
{
void *res;
sz = round_up(sz,8);
pthread_mutex_lock(&memory_pool_mutex);
pool_expand(sz);
res = (void*)((char*)memory_pools->memory + memory_pools->used);
memory_pools->used += sz;
pthread_mutex_unlock(&memory_pool_mutex);
memset(res,0,sz);
return res;
}