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      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)
     93