cvs commit: src/lib/libpthread/sys lock.c lock.h src/lib/libpthread/thread thr_cond.c thr_exit.c thr_init.c thr_join.c thr_kern.c thr_mutex.c thr_nanosleep.c thr_private.h thr_sig.c thr_sigsuspend.c thr_sigwait.c thr_yield.c

[Daniel Eischen]

deischen    2003/05/16 12:58:30 PDT

  FreeBSD src repository

  Modified files:
    lib/libpthread/sys   lock.c lock.h 
    lib/libpthread/thread thr_cond.c thr_exit.c thr_init.c 
                          thr_join.c thr_kern.c thr_mutex.c 
                          thr_nanosleep.c thr_private.h thr_sig.c 
                          thr_sigsuspend.c thr_sigwait.c 
                          thr_yield.c 
  Log:
  Add a method of yielding the current thread with the scheduler
  lock held (_thr_sched_switch_unlocked()) and use this to avoid
  dropping the scheduler lock and having the scheduler retake the
  same lock again.
  
  Add a better way of detecting if a low-level lock is in use.
  
  When switching out a thread due to blocking in the UTS, don't
  switch to the KSE's scheduler stack only to switch back to
  another thread.  If possible switch to the new thread directly
  from the old thread and avoid the overhead of the extra
  context switch.
  
  Check for pending signals on a thread when entering the scheduler
  and add them to the threads signal frame.  This includes some
  other minor signal fixes.
  
  Most of this was a joint effor between davidxu and myself.
  
  Reviewed by:    davidxu
  Approved by:    re@ (blanket for libpthread)
  
  Revision  Changes    Path
  1.4       +28 -28    src/lib/libpthread/sys/lock.c
  1.4       +4 -1      src/lib/libpthread/sys/lock.h
  1.40      +4 -4      src/lib/libpthread/thread/thr_cond.c
  1.32      +1 -2      src/lib/libpthread/thread/thr_exit.c
  1.52      +2 -0      src/lib/libpthread/thread/thr_init.c
  1.25      +4 -2      src/lib/libpthread/thread/thr_join.c
  1.65      +157 -116  src/lib/libpthread/thread/thr_kern.c
  1.35      +9 -9      src/lib/libpthread/thread/thr_mutex.c
  1.20      +1 -3      src/lib/libpthread/thread/thr_nanosleep.c
  1.87      +22 -23    src/lib/libpthread/thread/thr_private.h
  1.50      +110 -118  src/lib/libpthread/thread/thr_sig.c
  1.17      +1 -3      src/lib/libpthread/thread/thr_sigsuspend.c
  1.25      +1 -2      src/lib/libpthread/thread/thr_sigwait.c
  1.12      +0 -4      src/lib/libpthread/thread/thr_yield.c