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From: Daniel Eischen <deischen@FreeBSD.org>
Date: Wed, 8 Nov 2000 21:08:28 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/lib/libc_r/uthread pthread_private.h uthread_cond.c
         uthread_create.c uthread_detach.c uthread_exit.c uthread_info.c
         uthread_init.c uthread_jmp.c uthread_join.c uthread_kern.c
         uthread_mutex.c uthread_sig.c uthread_sigaction.c ...
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deischen    2000/11/08 21:08:27 PST

  Modified files:
    lib/libc_r/uthread   pthread_private.h uthread_cond.c 
                         uthread_create.c uthread_detach.c 
                         uthread_exit.c uthread_info.c 
                         uthread_init.c uthread_jmp.c 
                         uthread_join.c uthread_kern.c 
                         uthread_mutex.c uthread_sig.c 
                         uthread_sigaction.c uthread_sigmask.c 
  Log:
  Don't needlessly poll file descriptors when there are no
  file descriptors needing to be polled (Doh!).  Reported
  by Dan Nelson <dnelson@emsphone.com>.
  
  Don't install and start the scheduling timer until the
  first thread is created.  This prevents the overhead of
  having a periodic scheduling signal in a single threaded
  program.  Reported by Dan Nelson <dnelson@emsphone.com>.
  
  Allow builtin longjmps out of application installed
  signal handlers without the need perform any post-handler
  cleanup:
  
    o Change signal handling to save the threads interrupted
      context on the stack.  The threads current context is
      now always stored in the same place (in the pthread).
      If and when a signal handler returns, the interrupted
      context is copied back to the storage area in the pthread.
  
    o Before calling invoking a signal handler for a thread,
      back the thread out of any internal waiting queues
      (mutex, CV, join, etc) to which it belongs.
  
  Rework uthread_info.c a bit to make it easier to change
  the format of a thread dump.
  
  Use an alternal signal stack for the thread library's
  signal handler.  This allows us to fiddle with the main
  threads stack without fear of it being in use.
  
  Reviewed by:	jasone
  
  Revision  Changes    Path
  1.47      +39 -32    src/lib/libc_r/uthread/pthread_private.h
  1.28      +103 -44   src/lib/libc_r/uthread/uthread_cond.c
  1.27      +25 -22    src/lib/libc_r/uthread/uthread_create.c
  1.13      +7 -2      src/lib/libc_r/uthread/uthread_detach.c
  1.18      +15 -22    src/lib/libc_r/uthread/uthread_exit.c
  1.17      +101 -126  src/lib/libc_r/uthread/uthread_info.c
  1.26      +26 -30    src/lib/libc_r/uthread/uthread_init.c
  1.5       +34 -125   src/lib/libc_r/uthread/uthread_jmp.c
  1.14      +67 -39    src/lib/libc_r/uthread/uthread_join.c
  1.32      +46 -43    src/lib/libc_r/uthread/uthread_kern.c
  1.26      +25 -12    src/lib/libc_r/uthread/uthread_mutex.c
  1.30      +148 -299  src/lib/libc_r/uthread/uthread_sig.c
  1.13      +2 -2      src/lib/libc_r/uthread/uthread_sigaction.c
  1.7       +4 -1      src/lib/libc_r/uthread/uthread_sigmask.c



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