void *dbfile_more_mem(mmfile_t *mm, uint32_t *size)
{
uint64_t chunksize;
dbroot_t *root;
int n, rc;
void *ret = NULL;
root = (dbroot_t*)mm->map[0].ptr;
chunksize = root->meta.chunksize;
mm_lock(mm, MLCK_WR, __offset(mm, &root->resize), sizeof(root->resize));
if (mm->size == mm_size(mm)) {
log_debug("Resizing mmfile +%d bytes", chunksize);
rc = mm_resize(mm, mm->size + chunksize);
if (rc != 0) {
log_error("Resize failed"); abort();
}
n = mm->nmap-1;
*size = mm->map_offset[n].size;
ret = mm->map_offset[n].ptr;
} else {
chunksize = mm_size(mm);
log_debug("Expanding mapping to 0x%x bytes", chunksize);
mm_resize(mm, chunksize);
}
mm_lock(mm, MLCK_UN, __offset(mm, &root->resize), sizeof(root->resize));
return ret;
}
/***********************************************************************
* Resize an array. Allocates the array if it is null.
***********************************************************************/
ARRAY_T* resize_array
(ARRAY_T* array,
const int num_items)
{
ARRAY_T* new_array;
if (array == NULL) {
new_array = allocate_array(num_items);
} else {
new_array = array;
mm_resize(new_array->items, num_items, ATYPE);
new_array->num_items = num_items;
}
return(new_array);
}
/*************************************************************************
* Keep track of any sites which have the best score seen
*************************************************************************/
static void track_site(SEQ_SITES_T* seq_sites, double score,
int start, char strand) {
SEQ_SITE_T *site;
// don't bother recording worse scores
if (score < seq_sites->best) return;
// better scores clear the list
if (score > seq_sites->best) {
seq_sites->used = 0;
seq_sites->best = score;
}
// allocate memory on demand
if (seq_sites->allocated <= seq_sites->used) {
seq_sites->allocated += SCORE_BLOCK;
mm_resize(seq_sites->sites, seq_sites->allocated, SEQ_SITE_T);
}
// store the site
site = seq_sites->sites+(seq_sites->used++);
site->start = start;
site->strand = strand;
}
