newlib-cygwin/newlib/libc/unix/sigset.c

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2000-02-18 03:39:52 +08:00
#include <signal.h>
#include <errno.h>
#ifdef SIG_SETMASK /* easier than trying to remove from Makefile */
#undef sigemptyset
int
sigemptyset (sigset_t * set)
{
*set = (sigset_t) 0;
return 0;
}
int
sigfillset (sigset_t * set)
{
*set = ~((sigset_t) 0);
return 0;
}
#undef sigaddset
int
sigaddset (sigset_t * set, int signo)
{
if (signo >= NSIG || signo <= 0)
{
errno = EINVAL;
return -1;
}
*set |= 1 << (signo - 1);
return 0;
}
int
sigdelset (sigset_t * set, int signo)
{
if (signo >= NSIG || signo <= 0)
{
errno = EINVAL;
return -1;
}
*set &= ~(1 << (signo - 1));
return 0;
}
int
sigismember (const sigset_t * set, int signo)
{
if (signo >= NSIG || signo <= 0)
{
errno = EINVAL;
return -1;
}
if (*set & (1 << (signo - 1)))
return 1;
else
return 0;
}
#endif /* SIG_SETMASK */