[ruby-cvs:70539] normal:r63448 (trunk): thread: reduce GET_THREAD calls

[normal at ruby-lang.org]

normal	2018-05-17 06:54:42 +0900 (Thu, 17 May 2018)

  New Revision: 63448

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=63448

  Log:
    thread: reduce GET_THREAD calls
    
    This allows native_sleep to use less stack (80 -> 64 bytes on
    x86-64) for GVL_UNLOCK_BEGIN/END.  For future APIs, we will pass
    `ec` or `th` around anyways, so the BLOCKING_REGION change
    should be beneficial in the future.

  Modified files:
    trunk/thread.c
    trunk/thread_pthread.c
    trunk/thread_win32.c