52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
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///////////////////////////////////////////////////////////////////////////////
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//
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/// \file signals.h
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/// \brief Handling signals to abort operation
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//
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// Copyright (C) 2007-2009 Lasse Collin
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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///////////////////////////////////////////////////////////////////////////////
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/// If this is true, we will clean up the possibly incomplete output file,
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/// return to main() as soon as practical. That is, the code needs to poll
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/// this variable in various places.
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extern volatile sig_atomic_t user_abort;
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/// Initialize the signal handler, which will set user_abort to true when
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/// user e.g. presses C-c.
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extern void signals_init(void);
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#ifndef _WIN32
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/// Block the signals which don't have SA_RESTART and which would just set
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/// user_abort to true. This is handy when we don't want to handle EINTR
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/// and don't want SA_RESTART either.
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extern void signals_block(void);
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/// Unblock the signals blocked by signals_block().
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extern void signals_unblock(void);
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/// If user has sent us a signal earlier to terminate the process,
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/// re-raise that signal to actually terminate the process.
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extern void signals_exit(void);
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#else
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#define signals_block() do { } while (0)
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#define signals_unblock() do { } while (0)
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#define signals_exit() do { } while (0)
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#endif
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