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https://github.com/fish-shell/fish-shell
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63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
// The library for various signal related issues.
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#ifndef FISH_SIGNALH
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#define FISH_SIGNALH
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#include <csignal>
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#include <cstdint>
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/// Get the integer signal value representing the specified signal, or -1 of no signal was found.
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int wcs2sig(const wchar_t *str);
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/// Get string representation of a signal.
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const wchar_t *sig2wcs(int sig);
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/// Returns a description of the specified signal.
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const wchar_t *signal_get_desc(int sig);
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/// Set all signal handlers to SIG_DFL.
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void signal_reset_handlers();
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/// Set signal handlers to fish default handlers.
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void signal_set_handlers(bool interactive);
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/// Latch function. This sets signal handlers, but only the first time it is called.
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void signal_set_handlers_once(bool interactive);
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/// Tell fish what to do on the specified signal.
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///
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/// \param sig The signal to specify the action of
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void signal_handle(int sig);
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/// Ensure we did not inherit any blocked signals. See issue #3964.
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void signal_unblock_all();
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/// Returns signals with non-default handlers.
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void get_signals_with_handlers(sigset_t *set);
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/// \return the most recent cancellation signal received by the fish process.
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/// Currently only SIGINT is considered a cancellation signal.
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/// This is thread safe.
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int signal_check_cancel();
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/// Set the cancellation signal to zero.
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/// In generally this should only be done in interactive sessions.
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void signal_clear_cancel();
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enum class topic_t : uint8_t;
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/// A sigint_detector_t can be used to check if a SIGINT (or SIGHUP) has been delivered.
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class sigchecker_t {
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const topic_t topic_;
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uint64_t gen_{0};
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public:
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sigchecker_t(topic_t signal);
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/// Check if a sigint has been delivered since the last call to check(), or since the detector
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/// was created.
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bool check();
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/// Wait until a sigint is delivered.
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void wait() const;
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};
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#endif
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