source/utils/CarlaProcessUtils.cpp

   1 /*
   2  * Carla process utils
   3  * Copyright (C) 2019-2022 Filipe Coelho <falktx@falktx.com>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of
   8  * the License, or any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * For a full copy of the GNU General Public License see the doc/GPL.txt file.
  16  */
  17
  18 #include "CarlaProcessUtils.hpp"
  19
  20 // --------------------------------------------------------------------------------------------------------------------
  21 // process utility classes
  22
  23 #if !(defined(CARLA_OS_WASM) || defined(CARLA_OS_WIN))
  24 ScopedAbortCatcher::ScopedAbortCatcher()
  25 {
  26     s_triggered = false;
  27     s_oldsig = ::setjmp(s_env) == 0
  28              ? std::signal(SIGABRT, sig_handler)
  29              : nullptr;
  30 }
  31
  32 ScopedAbortCatcher::~ScopedAbortCatcher()
  33 {
  34     if (s_oldsig != nullptr && ! s_triggered)
  35         std::signal(SIGABRT, s_oldsig);
  36 }
  37
  38 bool ScopedAbortCatcher::s_triggered = false;
  39
  40 jmp_buf ScopedAbortCatcher::s_env;
  41 sig_t ScopedAbortCatcher::s_oldsig;
  42
  43 void ScopedAbortCatcher::sig_handler(const int signum)
  44 {
  45     CARLA_SAFE_ASSERT_INT2_RETURN(signum == SIGABRT, signum, SIGABRT,);
  46
  47     s_triggered = true;
  48     std::signal(signum, s_oldsig);
  49     std::longjmp(s_env, 1);
  50 }
  51 #endif
  52
  53 // --------------------------------------------------------------------------------------------------------------------
  54
  55 CarlaSignalRestorer::CarlaSignalRestorer()
  56 {
  57 #if !(defined(CARLA_OS_WASM) || defined(CARLA_OS_WIN))
  58     carla_zeroStructs(sigs, 16);
  59
  60     for (int i=0; i < 16; ++i)
  61         ::sigaction(i+1, nullptr, &sigs[i]);
  62 #endif
  63 }
  64
  65 CarlaSignalRestorer::~CarlaSignalRestorer()
  66 {
  67 #if !(defined(CARLA_OS_WASM) || defined(CARLA_OS_WIN))
  68     for (int i=0; i < 16; ++i)
  69         ::sigaction(i+1, &sigs[i], nullptr);
  70 #endif
  71 }
  72
  73 // --------------------------------------------------------------------------------------------------------------------