tools/purge/signal.hh

   1 /*
   2  * Copyright (C) 1996-2020 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 // Author:   Jens-S. V?ckler <voeckler@rvs.uni-hannover.de>
  10 // File:     signal.hh
  11 // Date:     Sat Feb 28 1998
  12 // Compiler: gcc 2.7.2.x series
  13 //
  14 // Books:    W. Richard Steven, "Advanced Programming in the UNIX Environment",
  15 //           Addison-Wesley, 1992.
  16 //
  17 // (c) 1998 Lehrgebiet Rechnernetze und Verteilte Systeme
  18 //          Universit?t Hannover, Germany
  19 //
  20 // Permission to use, copy, modify, distribute, and sell this software
  21 // and its documentation for any purpose is hereby granted without fee,
  22 // provided that (i) the above copyright notices and this permission
  23 // notice appear in all copies of the software and related documentation,
  24 // and (ii) the names of the Lehrgebiet Rechnernetze und Verteilte
  25 // Systeme and the University of Hannover may not be used in any
  26 // advertising or publicity relating to the software without the
  27 // specific, prior written permission of Lehrgebiet Rechnernetze und
  28 // Verteilte Systeme and the University of Hannover.
  29 //
  30 // THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
  31 // EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
  32 // WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
  33 //
  34 // IN NO EVENT SHALL THE LEHRGEBIET RECHNERNETZE UND VERTEILTE SYSTEME OR
  35 // THE UNIVERSITY OF HANNOVER BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
  36 // INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES
  37 // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT
  38 // ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY,
  39 // ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  40 // SOFTWARE.
  41 //
  42 // Revision 1.4  2000/09/21 10:59:27  cached
  43 // introduced extern "C" to function pointer type.
  44 //
  45 // Revision 1.3  1999/01/19 11:53:49  voeckler
  46 // added bool compatibility definitions.
  47 //
  48 // Revision 1.2  1999/01/19 11:00:50  voeckler
  49 // added psignal(int,const char*) compatibility function declaration.
  50 //
  51 // Revision 1.1  1998/08/13 21:51:58  voeckler
  52 // Initial revision
  53 //
  54 //
  55
  56 #ifndef _SIGNAL_HH
  57 #define _SIGNAL_HH
  58
  59 #include "squid.h"
  60
  61 #include <csignal>
  62
  63 #if !defined(__cplusplus)
  64 #ifndef HAVE_BOOL
  65 #define HAVE_BOOL
  66 typedef int bool;
  67 #define false 0
  68 #define true  1
  69 #endif
  70 #endif /* __cplusplus */
  71
  72 #if 1 // so far, all systems I know use void
  73 # define SIGRETTYPE void
  74 #else
  75 # define SIGRETTYPE int
  76 #endif
  77
  78 #if defined(SUNOS) && defined(SUN)
  79 # define SIGPARAM void
  80 #else // SOLARIS, LINUX, IRIX, AIX, SINIXY
  81 # define SIGPARAM int
  82 #endif
  83
  84 extern "C" {
  85   typedef SIGRETTYPE SigFunc( SIGPARAM );
  86 }
  87
  88 SigFunc*
  89 Signal( int signo, SigFunc* newhandler, bool doInterrupt );
  90   // purpose: install reliable signals
  91   // paramtr: signo (IN): signal for which a handler is to be installed
  92   //          newhandler (IN): function pointer to the signal handler
  93   //          doInterrupt (IN): interrupted system calls wanted!
  94   // returns: the old signal handler, or SIG_ERR in case of error.
  95
  96 SIGRETTYPE
  97 sigChild( int signo );
  98   // purpose: supply ad hoc child handler with output on stderr
  99   // paramtr: signo (IN): == SIGCHLD
 100   // returns: only if OS uses a return type for signal handler
 101
 102 #endif // _SIGNAL_HH