changelog

Linux下的中文输入法

      [Ralf S. Engelschall]

   *) Fixed two bugs in internal pth_pqueue_delete() and one in
      pth_pqueue_insert(): it accidently also adjusted the priority
      queue top element if one deleted the last element of the queue and it
      calculated the priority of the following element incorrectly.
      [Jens Andersen <[e-mail]>, Ralf S. Engelschall]

   *) Optimized the signal mask handling: The application is now required to
      use pth_sigmask(3) and no longer can use sigprocmask(2) directly
      (as it's already the case for Pthreads where POSIX states that the
      behaviour of sigprocmask(2) is not defined in a MT application).
      The side-effect of this consistencency restriction is that
      internally the machine context switching no longer has to remember
      the signal mask on _every_ context switch. It's now sufficient
      that pth_sigmask(3) sets the mask to allow the scheduler to
      calculate its own mask. The result is a faster and more clean
      thread dispatching. Additionally a soft and hard syscall mapping
      for sigprocmask(2) was added, of course.
      [Ralf S. Engelschall]

   *) Added support for socklen_t to both avoid warnings under
      some platforms and to avoid problems on 64 bit machines.
      [Ralf S. Engelschall]

   *) Added UnixWare7 support to config.guess
      [Ralf S. Engelschall]

   *) Added config.param facility.
      [Ralf S. Engelschall]

   *) Cleaned up bootstrap stuff from configure.in and moved it to aclocal.m4.
      [Ralf S. Engelschall]

   *) Fixed autoconf's `--silent' flag: it wasn't passed to ltconfig.sh
      [Ralf S. Engelschall]

   *) Rewritten the "make test" message and refreshed the PORTING file to
      start with a new format which now includes also the machine context and
      stack growth direction.
      [Ralf S. Engelschall]

   *) Enhanced the interactive (not --enable-batch) mode: The Makefile now
      displays real hints what to do as the next step. All messages can
      be disabled via --enable-batch, of course.
      [Ralf S. Engelschall]

   *) Fixed aclocal.m4: Tabs were lost by accident.
      [Ralf S. Engelschall]

   *) Fixed a type warning in pth_debug.c: pid_t vs. int
      [Ralf S. Engelschall]

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  __|_(_)_|_______________________________________________________________

  Changes between 1.1.5 and 1.1.6 (02-Sep-1999 to 28-Sep-1999)

   *) Backport from Pth 1.2b6:
      Fixed the Autoconf AC_CHECK_MCSC check which tests whether
      SVR4/SUSv2 makecontext(2), swapcontext(2) and friends can be used for
      user-space context switching. It was broken because the uc_link and
      uc_stack structure attributes were not initialized correctly.
      [Ralf S. Engelschall, Ben Harris <[e-mail]>]

   *) Backport from Pth 1.2b5:
      Document it more clearly that PTH_ATTR_DEFAULT is _not_ the values an
      pth_attr_init() creates. It means that priority, joinability and
      cancelstate are _inherited_.
      [Eric Newton <[e-mail]>]

   *) Backport from Pth 1.2b4:
      Fixed test_httpd.c: highest port is 65535 and not 65553 ;)
      [Alex Fiori <[e-mail]>]

   *) Backport from Pth 1.2b4:
      Make Rhapsody happy with pth_errno.c by statically initializing
      the contained variables.
      [Ben Harris <[e-mail]>, Ralf S. Engelschall]

   *) Backport from Pth 1.2b3:
      Add `PTHREAD' also to defines for namespace protection.
      [Hans v. Sommerfeld <[e-mail]>]

   *) Upgraded to GNU shtool 1.4.6
      [Ralf S. Engelschall]

  Changes between 1.1.4 and 1.1.5 (30-Aug-1999 to 02-Sep-1999)

   *) Backport from Pth 1.2b1:
      Enhanced pth-config/pthread-config scripts: first they
      are now concatenating the output of the options into a single
      string and print this at the end once. This way one can use things
      like LIBS="`pthread-config --ldflags --libs`" without getting an
      intermediate newline which causes trouble in various packages.
      Second per default only pth-specific CFLAGS/LDFLAGS/LIBS are
      printed. If one wants also additional flags one has used while
      building Pth one now can add the --all option. This is to avoid
      conflicts between Pth flags and flags of the application.
      [Ralf S. Engelschall]

   *) Backport from Pth 1.2b1:
      Fixed two bugs in internal pth_pqueue_delete() and one in
      pth_pqueue_insert(): it accidently also adjusted the priority
      queue top element if one deleted the last element of the queue and it
      calculated the priority of the following element incorrectly.
      [Jens Andersen <[e-mail]>, Ralf S. Engelschall]

   *) Backport from Pth 1.2b1:
      Added -w to CFLAGS for Solaris if $CC is not GCC to avoid the
      warnings about "end of loop not reached" because of our
      ``do { ...return;... } while(0)'' macros.
      [Ralf S. Engelschall]

   *) Backport from Pth 1.2b1:
      Fixed autoconf's `--silent' flag: it wasn't passed to ltconfig.sh
      [Ralf S. Engelschall]

   *) Backport from Pth 1.2b1:
      Fixed aclocal.m4: Tabs were lost by accident.
      [Ralf S. Engelschall]

   *) Backport from Pth 1.2b1:
      Fixed a type warning in pth_debug.c: pid_t vs. int
      [Ralf S. Engelschall]

  Changes between 1.1.3 and 1.1.4 (27-Aug-1999 to 30-Aug-1999)

   *) Changed internal handling of spawned threads: they are now really
      inserted to the top of the priority queue to make sure a thread is
      guarrantied to be dispatched next when one calls pth_yield(NULL)
      directly after a pth_spawn(). This is especially interesting for
      programming with the co-routine paradigm where it allows one to better
      control the startup of a co-routine.
      [Ralf S. Engelschall, Jens Andersen <[e-mail]>]

   *) Fixed pthread_cancel(): a switch statement was incorrect (three
      breaks were missing to stop falling through).
      [Jens Andersen <[e-mail]>]

   *) Change internal `_pthread' prefix to `__pthread'.
      [Ralf S. Engelschall]

   *) Enhanced backward compatibility stuff for Pthread draft 4 (DCE Threads)
      in pthread.h.in: When _POSIX_BACKCOMPAT is defined before the pthread.h
      header is included one now gets a lot more backward compatibility
      mappings.
      [Ralf S. Engelschall]

   *) Optimize internal processing by inlining various small functions from
      pth_ring.c, pth_pqueue.c and pth_sched.c which are called a lot.
      [Ralf S. Engelschall]

   *) Optimized readline() in test_common.c
      [Ralf S. Engelschall]

   *) Added specific support for Linux/glibc/mc68000 to pth_mctx.c
      [Roman Hodek <[e-mail]>]

   *) Updated INSTALL document for --enable-optimize.
      [Ralf S. Engelschall]

  Changes between 1.1.2 and 1.1.3 (23-Aug-1999 to 27-Aug-1999)

   *) Enhanced test program of AC_CHECK_STACKGROWTH in aclocal.m4 to
      make sure the test variables are not optimized away by the
      compiler and this way lead to incorrect check results.
      [Martin Kraemer <[e-mail]>, Ralf S. Engelschall]

   *) Fixed default stack size: was 32*16384 (=512KB) instead
      of the intended 32*1024 (=32KB).
      [Ralf S. Engelschall]

   *) Added --enable-optimize flag to configure with selected
      standard optimization flags of GCC.
      [Ralf S. Engelschall]

   *) Added SUPPORT file to source tree.
      [Ralf S. Engelschall]

   *) Added test_philo, Dijkstra's Five Dining Philosophers ;)
      [Ralf S. Engelschall]

   *) Add "auto" qualifier to PTH_STACKGROWTH test program
      to make sure the variables are placed into the stack.
      [Ralf S. Engelschall]

   *) Use predetermined $PLATFORM of configure also in Makefile
      [Ralf S. Engelschall]

  Changes between 1.1.1 and 1.1.2 (21-Aug-1999 to 23-Aug-1999)

   *) Fixed Makefile.in: pth_acdef.h and pth_acmac.h were not removed on
      "distclean" and this way they were accidently distributed.
      [Ralf S. Engelschall]

   *) Changed return type of pth_yield() from `void' to `int' to
      be able to return an error FALSE/EINVAL in case the `tid'
      argument specified an invalid or still not ready thread.
      [Kurt D. Zeilenga <[e-mail]>, Ralf S. Engelschall]

   *) Fixed description of pth_yield() in pth.pod.
      [Kurt D. Zeilenga <[e-mail]>, Ralf S. Engelschall]

  Changes between 1.1.0 and 1.1.1 (19-Aug-1999 to 21-Aug-1999)

   *) Changed pthread_yield_np() from `void' return type to `int' to allow the
      `#define sched_yield pthread_yield_np' work as expected, because
      sched_yield has `int' return type per SUSv2.
      [Kurt D. Zeilenga <[e-mail]>, Ralf S. Engelschall]

   *) Fixed problems related to pthread_exit() and pth_exit(): The
      PTH_EVENT_FUNC internally was used incorrectly by pth_exit() and the
      implicit initialization was forgotten in pthread_exit().
      [Kurt D. Zeilenga <[e-mail]>, Ralf S. Engelschall]

   *) Added consistency check for `timeout' attribute of pth_poll
      and various other EINVAL related checks to pth_event.c.
      [Ralf S. Engelschall]

   *) Added consistency check for `abstime' attribute of
      pthread_cond_timedwait().
      [Ralf S. Engelschall]

  Changes between 1.1b7 and 1.1.0 (18-Aug-1999 to 19-Aug-1999)

   *) Disable vendor typedefs in pthread.h.in because
      it caused problems under Solaris.
      [Ralf S. Engelschall]

   *) Cleaned up the sources a little bit more.
      [Ralf S. Engelschall]

   *) Updated rse-pmt.ps to v0.9.15
      [Ralf S. Engelschall]

  Changes between 1.1b6 and 1.1b7 (18-Aug-1999 to 18-Aug-1999)

   *) Added test for nested thread operation to test_std.c
      [Ralf S. Engelschall]

   *) Updated rse-pmt.ps to talk about the sigsetjmp(3) problems.
      [Ralf S. Engelschall]

   *) Enhanced the heart of Pth: pth_mctx_set().
      Instead of the real dispatching functions a plain setjmp(3)/longjmp(3)
      pair is used for the trampoline trick in order to avoid problems with
      sigjmp_buf-attached signal stacks on platforms where sigsetjmp(3) does
      more than it is usuallly expected. This especially fixes `thread spawns
      thread' problems under HPUX.
      [Ralf S. Engelschall, Aaron Metzger <[e-mail]>]

  Changes between 1.1b5 and 1.1b6 (17-Aug-1999 to 18-Aug-1999)

   *) Fixed return value of pth_write/pth_read.
      [Eric Newton <[e-mail]>, Ralf S. Engelschall]

   *) Fixed example in manual page (pth.pod): pth_load()
      is now pth_ctrl(PTH_CTRL_GETAVLOAD, ...)
      [Eric Newton <[e-mail]>]

   *) Fixed warning in pth_high.c related to implicit casting.
      [Ralf S. Engelschall]

   *) Added BS2000 support to config.guess/config.sub.
      [Martin Kraemer]

   *) Fixed a sigaltstack() call in pth_mctx.c: the return code
      was checked incorrectly.
      [Ralf S. Engelschall]

   *) Updated rse-pmt.ps
      [Ralf S. Engelschall, Eric Newton <[e-mail]>]

   *) Fixed a nasty bug in the thread stack allocation: A stack was also
      allocated for the main thread, but not used. The problem was that an
      allocated stack has a guardian and this way was checked each time and
      could lead to a bogus STACK OVERFLOW for the "main" thread.
      [Ralf S. Engelschall, Martin Kraemer]

  Changes between 1.1b4 and 1.1b5 (13-Aug-1999 to 17-Aug-1999)

   *) Added draft of forthcoming paper ``Portable Multithreading - The Signal
      Stack Trick Of User-Space Thread Creation'' to source tree under
      rse-pmt.ps. Hackers are encouraged to read this if they want to
      understand Pth's internals.
      [Ralf S. Engelschall]

   *) Source cleanups: added `extern' qualifier to function prototypes in
      pth.h.in and pthread.h.in; make compilation silent with both gcc 2.95.1 C
      and C++ frontends by fixing implicit type conversion situations, etc.
      [Ralf S. Engelschall]

   *) Return EBUSY instead of EAGAIN for pth_mutex_acquire() when the "try"
      argument is TRUE. This fixes especially the POSIX semantics of
      pthread_mutex_trylock().
      [Ralf S. Engelschall]

   *) Added pth_compat.c with strerror(3) replacement for SunOS.
      [Ralf S. Engelschall]

   *) Fixed pthread_{mutex,rwlock,cond}_destroy() functions.
      [Ralf S. Engelschall]

   *) Added support for `configure <platform-id>'.
      [Ralf S. Engelschall, Martin Kraemer <[e-mail]>]

  Changes between 1.1b3 and 1.1b4 (11-Aug-1999 to 13-Aug-1999)

   *) Fixed blocking semantics of pth_writev().
      [Ralf S. Engelschall]

   *) Fixed a very nasty bug in pth_select(): The write fd_set was passed
      twice to the scheduler (once as the write fd_set and once as the
      execptional fd_set). This caused problems, because the event loop this
      way deleted bits in the write fd_set by accident and the return semantic
      was broken.
      [Ralf S. Engelschall]

   *) Added fallbacks for UIO_MAXIOV to pth.h and pthread.h
      [Ralf S. Engelschall]

   *) Remove locking che