tools/purge/signal.hh

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