squid_off_t
stmemFreeDataUpto(mem_hdr * mem, squid_off_t target_offset)
{
squid_off_t current_offset = mem->origin_offset;
mem_node *p = mem->head;
while (p && ((current_offset + p->len) <= target_offset)) {
if (p == mem->tail) {
/* keep the last one to avoid change to other part of code */
mem->head = mem->tail;
mem->origin_offset = current_offset;
return current_offset;
} else {
mem_node *lastp = p;
p = p->next;
current_offset += lastp->len;
store_mem_size -= SM_PAGE_SIZE;
stmemNodeFree(lastp);
}
}
mem->head = p;
mem->origin_offset = current_offset;
if (current_offset < target_offset) {
/* there are still some data left. */
return current_offset;
}
assert(current_offset == target_offset);
return current_offset;
}
void
stmemNodeUnref(mem_node_ref * r)
{
if (!r->node)
return;
stmemNodeFree((void *) r->node);
r->node = NULL;
r->offset = -1;
}
void
stmemFree(mem_hdr * mem)
{
mem_node *p;
while ((p = mem->head)) {
mem->head = p->next;
store_mem_size -= SM_PAGE_SIZE;
stmemNodeFree(p);
}
mem->head = mem->tail = NULL;
mem->origin_offset = 0;
}
