Dayue Gao 8aa2cbe12d Load Rowset only once in a thread-safe manner (#2022) ...

[Storage]
This PR implements thread-safe `Rowset::load()` for both AlphaRowset and BetaRowset. The main changes are 

1. Introduce `DorisCallOnce<ReturnType>` to be the replacement for `DorisInitOnce` . It works for both Status and OLAPStatus.
2. `segment_v2::ColumnReader::init()` is now implemented by DorisCallOnce.
3. `segment_v2::Segment` is now created by a factory open() method. This guarantees all Segment instances are in opened state.
4. `segment_v2::Segment::_load_index()` is now implemented by DorisCallOnce.
5. Implement thread-safe load() for AlphaRowset and BetaRowset

2019-10-21 16:05:12 +08:00

..

src

Load Rowset only once in a thread-safe manner (#2022)

2019-10-21 16:05:12 +08:00

test

Load Rowset only once in a thread-safe manner (#2022)

2019-10-21 16:05:12 +08:00

CMakeLists.txt

Make CpuInfo::get_current_core work (#1773)

2019-09-10 19:35:55 +08:00