Open Mash Cross Reference
mash/tcl/common/ztrace.tcl

   # ztrace.tcl --
   #
   #       Buffer output until a SIGINT is caught; when caught, flush the output
   #       and exit. The implementation that allows the ZTrace object to be
   #       "compiled away" is from Yatin's MTrace impl.
   #
   # Copyright (c) 1998-2002 The Regents of the University of California.
   # All rights reserved.
   #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are met:
  #
  # A. Redistributions of source code must retain the above copyright notice,
  #    this list of conditions and the following disclaimer.
  # B. Redistributions in binary form must reproduce the above copyright notice,
  #    this list of conditions and the following disclaimer in the documentation
  #    and/or other materials provided with the distribution.
  # C. Neither the names of the copyright holders nor the names of its
  #    contributors may be used to endorse or promote products derived from this
  #    software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
  # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  # ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
  # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  #
  #  $Header: /usr/mash/src/repository/mash/mash-1/tcl/common/ztrace.tcl,v 1.5 2002/02/03 04:25:43 lim Exp $
  
  
  # Check if the ZTrace object exists, if it doesn't, then just create a NULL
  # ZTrace method.
  
  #Class ZTrace -- import needs this comment so it can find C++ defined objs
  
  if { [Class info instances ZTrace]=="" } {
      proc ZTrace { args } {
              # ZTracing not enabled so define
              # this method to do nothing
              return ZTrace
      }
  }
  
  ZTrace proc init { } {
          ZTrace instvar ztrace
          set ztrace [new ZTrace]
  }
  
  proc ztrace { args } {
          ZTrace instvar ztrace
          if [info exists ztrace] {
                  $ztrace trace $args
          }
  }