static int op_alloc(const LogEntry* e, Page* p) {
assert(e->update.arg_size >= sizeof(alloc_arg));
const alloc_arg* arg = stasis_log_entry_update_args_cptr(e);
recordid rid = {
p->id,
arg->slot,
arg->type
};
int ret = operate_helper(e->xid,p,rid);
int64_t size = stasis_record_length_read(e->xid,p,rid);
if(e->update.arg_size == sizeof(alloc_arg) + size) {
// if we're aborting a dealloc we better have a sane preimage to apply
rid.size = size;
stasis_record_write(e->xid,p,rid,(const byte*)(arg+1));
rid.size = arg->type;
} else {
// otherwise, no preimage
assert(e->update.arg_size == sizeof(alloc_arg));
}
return ret;
}
static int op_increment(const LogEntry* e, Page* p) {
int i;
assert(e->update.arg_size == sizeof(slotid_t));
recordid r = {p->id, *(const slotid_t*)stasis_log_entry_update_args_cptr(e), sizeof(int)};
stasis_record_read(e->xid, p, r, (byte*)&i);
i++;
stasis_record_write(e->xid, p, r, (byte*)&i);
return 0;
}