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43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
///////////////////////////////////////////////////////////////////////////////
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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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// Author: Lasse Collin
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//
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// This file has been put into the public domain.
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// You can do whatever you want with this file.
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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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#if (defined(_WIN32) && !defined(__CYGWIN__)) || defined(__VMS)
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# define signals_block() do { } while (0)
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# define signals_unblock() do { } while (0)
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#else
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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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#endif
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#if defined(_WIN32) && !defined(__CYGWIN__)
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# define signals_exit() do { } while (0)
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#else
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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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#endif
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