Fix: Fatal assert(happens rarely) due to invalid thread state. Use gcc atomic functions.

Remove invalid threadex state 'STARTING'

Disable pthdcancel argument using pthread_cancel due to stability issue of threadex.

Add more utility functions and their tests.

Add more functions to yut.

Improve heap and it's test. (test passed)

Update heap using static compare that is enabled by config in source..

Add very simple rx module - simple listener structure.

Improve log, assert, build for better debugging. Refind codes.

Fix memory corruption rarely happens at taskmanager and taskdepman.

Fix segment-fault that rarely happens when looper is stopped.

Rename symbol name starting with '_' to respect C standard. Refind comments.

Add test and comments for lockless ringbuffer.

Add --with-test configuration. Fix incorrect test (threadex). Add ringbuf module (draft)

Refactoring: Fix compiler errors. Style. Renaming. ETC!