[ruby-cvs:78714] b12bc3b046 (master): thread.c: avoid needless read after select|ppoll

Eric Wong	2019-12-17 03:28:44 +0900 (Tue, 17 Dec 2019)

  New Revision: b12bc3b046

  https://github.com/ruby/ruby/commit/b12bc3b046

  Log:
    thread.c: avoid needless read after select|ppoll
    
    We do not need to issue pipe|eventfd read(2) syscall
    unless select, ppoll|poll declares the FD needs reading.

  Modified files:
    thread.c