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%% options
copyright owner = Dirk Krause
copyright year = 2011-xxxx
license = bsd
%% header
#include "dk3conf.h"
#include "dk3types.h"
#ifdef __cplusplus
extern "C" {
#endif
/** Set new handler for the specified signal.
@param signo Signal number.
@param fct Handler function address.
@return The previous handler function address.
*/
dk3_signal_disp_t
dk3signal_set(int signo, dk3_signal_disp_t fct);
/** Refresh signal handler, if only signal() mechanism available.
Should be a signal handlers first action.
@param signo Signal number.
@param fct Handler function address.
*/
void
dk3signal_refresh(int signo, dk3_signal_disp_t fct);
/** Find best available signal handling mechanism.
@return DK3_SIGNAL_HANDLING_TYPE_xxx.
*/
int
dk3signal_available(void);
#ifdef __cplusplus
}
#endif
%% module
#include "dk3all.h"
$!trace-include
#if DK3_HAVE_SIGACTION
/** Set new signal disposition.
@param signo Signal number of signal to modify.
@param fct New signal disposition.
@return Previous signal disposition.
*/
static
dk3_signal_disp_t
dk3signal_sigaction(int signo, dk3_signal_disp_t fct)
{
dk3_signal_disp_t back = (dk3_signal_disp_t)SIG_ERR;
struct sigaction act, oact;
act.sa_handler = fct;
sigemptyset(&act.sa_mask);
if(signo == SIGALRM) {
#ifdef SA_INTERRUPT
act.sa_flags |= SA_INTERRUPT;
#else
#ifdef SA_RESTART
act.sa_flags |= SA_RESTART;
#endif
#endif
}
if(sigaction(signo, &act, &oact) < 0) {
back = (dk3_signal_disp_t)SIG_ERR;
} else {
back = (dk3_signal_disp_t)oact.sa_handler;
}
return back;
}
#endif
dk3_signal_disp_t
dk3signal_set(int signo, dk3_signal_disp_t fct)
{
dk3_signal_disp_t back = NULL;
#if DK3_HAVE_SIGACTION
/* + sigaction */
back = dk3signal_sigaction(signo, fct);
/* - sigaction */
#else
#if DK3_HAVE_SIGSET
/* + sigset */
back = (dk3_signal_disp_t)sigset(signo,fct);
/* - sigset */
#else
#if DK3_HAVE_SIGNAL
/* + signal */
back = (dk3_signal_disp_t)signal(signo,fct);
/* - signal */
#else
#error "No signal handling functions available"
#endif
#endif
#endif
return back;
}
void
dk3signal_refresh(int signo, dk3_signal_disp_t fct)
{
#if DK3_HAVE_SIGACTION
#else
#if DK3_HAVE_SIGSET
#else
#if DK3_HAVE_SIGNAL
(void)signal(signo, fct);
#else
#endif
#endif
#endif
}
int
dk3signal_available(void)
{
int back = DK3_SIGNAL_HANDLING_TYPE_NONE;
#if DK3_HAVE_SIGACTION
back = DK3_SIGNAL_HANDLING_TYPE_SIGACTION;
#else
#if DK3_HAVE_SIGSET
back = DK3_SIGNAL_HANDLING_TYPE_SIGSET;
#else
#if DK3_HAVE_SIGNAL
back = DK3_SIGNAL_HANDLING_TYPE_SIGNAL;
#endif
#endif
#endif
return back;
}
/* vim: set ai sw=2 : */
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