gimpsignal

SA_RESTART

#define SA_RESTART SA_SYSV

This is just an alias for systems which do not define SA_RESTART.

GimpSignalHandlerFunc ()

void        (*GimpSignalHandlerFunc)        (gint signum);

A prototype for signal handler functions. Note that each function which takes or returns a variable of this type also accepts or may return special values defined by your system's signal.h header file (like SIG_DFL or SIG_IGN).

gimp_signal_private ()

GimpSignalHandlerFunc gimp_signal_private   (gint signum,
                                             GimpSignalHandlerFunc handler,
                                             gint flags);

This function furnishes a workalike for signal(2) but which internally invokes sigaction(2) after certain sa_flags are set; these primarily to ensure restarting of interrupted system calls. See sigaction(2) It is a aid to transition and not new development: that effort should employ sigaction directly. [gosgood 18.04.2000]

Cause handler to be run when signum is delivered. We use sigaction(2) rather than signal(2) so that we can control the signal handler's environment completely via flags: some signal(2) implementations differ in their sematics, so we need to nail down exactly what we want. [austin 06.04.2000]

gimp_signal_syscallrestart()

#define gimp_signal_syscallrestart(signum,handler) gimp_signal_private ((signum), (handler), SA_RESTART)

Installs a signal handler in a way that system calls which were not finished at the time of signal handler invocation will be silently restarted by the system (without failing with an error of EINTR).