string compressed;
{
- unique_lock<mutex> lock(mu);
+ unique_lock lock(mu);
queue_added.wait(lock, [&work_queue, &done] { return !work_queue.empty() || done; });
if (done && work_queue.empty()) {
return;
complete_pread(fd, &compressed[0], io_len, offsets[io_docid]);
{
- unique_lock<mutex> lock(mu);
+ unique_lock lock(mu);
queue_removed.wait(lock, [&work_queue] { return work_queue.size() < 256; }); // Allow ~2MB of data queued up.
work_queue.emplace_back(io_docid, last_docid, move(compressed));
queue_added.notify_one(); // Avoid the thundering herd.