external/bsd/atf/dist/tools/signals.hpp

   1 //
   2 // Automated Testing Framework (atf)
   3 //
   4 // Copyright (c) 2007 The NetBSD Foundation, Inc.
   5 // All rights reserved.
   6 //
   7 // Redistribution and use in source and binary forms, with or without
   8 // modification, are permitted provided that the following conditions
   9 // are met:
  10 // 1. Redistributions of source code must retain the above copyright
  11 //    notice, this list of conditions and the following disclaimer.
  12 // 2. Redistributions in binary form must reproduce the above copyright
  13 //    notice, this list of conditions and the following disclaimer in the
  14 //    documentation and/or other materials provided with the distribution.
  15 //
  16 // THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
  17 // CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  18 // INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20 // IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
  21 // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  23 // GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  25 // IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  27 // IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 //
  29
  30 #if !defined(TOOLS_SIGNALS_HPP)
  31 #define TOOLS_SIGNALS_HPP
  32
  33 extern "C" {
  34 #include <signal.h>
  35 }
  36
  37 namespace tools {
  38 namespace signals {
  39
  40 extern const int last_signo;
  41 typedef void (*handler)(const int);
  42
  43 class signal_programmer;
  44
  45 // ------------------------------------------------------------------------
  46 // The "signal_holder" class.
  47 // ------------------------------------------------------------------------
  48
  49 //
  50 // A RAII model to hold a signal while the object is alive.
  51 //
  52 class signal_holder {
  53     const int m_signo;
  54     signal_programmer* m_sp;
  55
  56 public:
  57     signal_holder(const int);
  58     ~signal_holder(void);
  59
  60     void process(void);
  61 };
  62
  63 // ------------------------------------------------------------------------
  64 // The "signal_programmer" class.
  65 // ------------------------------------------------------------------------
  66
  67 //
  68 // A RAII model to program a signal while the object is alive.
  69 //
  70 class signal_programmer {
  71     const int m_signo;
  72     const handler m_handler;
  73     bool m_programmed;
  74     struct sigaction m_oldsa;
  75
  76 public:
  77     signal_programmer(const int, const handler);
  78     ~signal_programmer(void);
  79
  80     void unprogram(void);
  81 };
  82
  83 // ------------------------------------------------------------------------
  84 // Free functions.
  85 // ------------------------------------------------------------------------
  86
  87 void reset(const int);
  88
  89 } // namespace signals
  90 } // namespace tools
  91
  92 #endif // !defined(TOOLS_SIGNALS_HPP)