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lib sigblock,sigrelse,sigsetmask,sigprocmask,sigvec
typ sigset_t ast.h signal.h
mem sigvec.sv_mask signal.h
cat{
#ifndef _mem_sigvec_sv_mask
# undef _lib_sigvec
#endif
#ifdef _lib_sigprocmask
# define sh_sigaction(s,action) do { sigset_t ss;\
sigemptyset(&ss); \
if(s) sigaddset(&ss,(s)); \
sigprocmask(action,&ss,0); \
}while(0)
# define sigrelease(s) sh_sigaction(s,SIG_UNBLOCK)
# define sigblock(s) sh_sigaction(s,SIG_BLOCK)
# define sig_begin() sh_sigaction(0,SIG_SETMASK)
#else
# ifndef _lib_sigblock
# define sigblock(s)
# endif
# ifdef _lib_sigsetmask
# define sigrelease(s) sigsetmask(0)
# define sig_begin() sigsetmask(0)
# else
# ifdef _lib_sigrelse
# define sigrelease sigrelse
# define sig_begin()
# else
# define sig_begin() (0)
# define sigrelease(s) (0)
# endif /* _lib_sigrelse */
# endif /* _lib_sigsetmask */
#endif /* _lib_sigprocmask */
}end
tst output{
#include <signal.h>
int main()
{
#ifdef SIGRTMIN
printf("#undef _SIGRTMIN\n");
printf("#define _SIGRTMIN %d\n", SIGRTMIN);
#endif
#ifdef SIGRTMAX
printf("#undef _SIGRTMAX\n");
printf("#define _SIGRTMAX %d\n", SIGRTMAX);
#endif
return 0;
}
}end
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