1 // Copyright 2012 The Kyua Authors. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above copyright 11 // notice, this list of conditions and the following disclaimer in the 12 // documentation and/or other materials provided with the distribution. 13 // * Neither the name of Google Inc. nor the names of its contributors 14 // may be used to endorse or promote products derived from this software 15 // without specific prior written permission. 16 // 17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29 /// \file utils/signals/interrupts.hpp 30 /// Handling of interrupts. 31 32 #if !defined(UTILS_SIGNALS_INTERRUPTS_HPP) 33 #define UTILS_SIGNALS_INTERRUPTS_HPP 34 35 #include "utils/signals/interrupts_fwd.hpp" 36 37 #include <unistd.h> 38 39 #include "utils/noncopyable.hpp" 40 41 namespace utils { 42 namespace signals { 43 44 45 /// Provides a scope in which interrupts can be detected and handled. 46 /// 47 /// This RAII-modeled object installs signal handler when instantiated and 48 /// removes them upon destruction. While this object is active, the 49 /// check_interrupt() free function can be used to determine if an interrupt has 50 /// happened. 51 class interrupts_handler : noncopyable { 52 /// Whether the interrupts are still programmed or not. 53 /// 54 /// Used by the destructor to prevent double-unprogramming when unprogram() 55 /// is explicitly called by the user. 56 bool _programmed; 57 58 public: 59 interrupts_handler(void); 60 ~interrupts_handler(void); 61 62 void unprogram(void); 63 }; 64 65 66 /// Disables interrupts while the object is alive. 67 class interrupts_inhibiter : noncopyable { 68 public: 69 interrupts_inhibiter(void); 70 ~interrupts_inhibiter(void); 71 }; 72 73 74 void check_interrupt(void); 75 76 void add_pid_to_kill(const pid_t); 77 void remove_pid_to_kill(const pid_t); 78 79 80 } // namespace signals 81 } // namespace utils 82 83 #endif // !defined(UTILS_SIGNALS_INTERRUPTS_HPP) 84