diff options
Diffstat (limited to 'src/syssignal.h')
| -rw-r--r-- | src/syssignal.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/src/syssignal.h b/src/syssignal.h index dddaee80924..ad3958647f2 100644 --- a/src/syssignal.h +++ b/src/syssignal.h @@ -18,6 +18,9 @@ along with GNU Emacs; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifdef POSIX_SIGNALS + +#include <signal.h> + #define SIGMASKTYPE sigset_t #define SIGEMPTYMASK (empty_mask) @@ -26,6 +29,7 @@ extern sigset_t empty_mask, full_mask, temp_mask; /* POSIX pretty much destroys any possibility of writing sigmask as a macro in standard C. */ +#ifndef sigmask #ifdef __GNUC__ #define sigmask(SIG) \ ({ \ @@ -37,6 +41,7 @@ extern sigset_t empty_mask, full_mask, temp_mask; #else /* ! defined (__GNUC__) */ #define sigmask(SIG) (sys_sigmask (SIG)) #endif /* ! defined (__GNUC__) */ +#endif #define sigpause(SIG) sys_sigpause(SIG) #define sigblock(SIG) sys_sigblock(SIG) @@ -45,9 +50,13 @@ extern sigset_t empty_mask, full_mask, temp_mask; #define sighold(SIG) ONLY_USED_IN_BSD_4_1 #define sigrelse(SIG) ONLY_USED_IN_BSD_4_1 -int (*sys_signal (int signal_number, int (*action)())) (); -int sys_sigpause (int signal_number); -sigset_t sys_sigblock (sigset_t new_mask); +/* Whether this is what all systems want or not, this is what + appears to be assumed in the source, for example data.c:arith_error() */ +typedef RETSIGTYPE (*signal_handler_t) (int); + +signal_handler_t sys_signal (int signal_number, int (*action)()); +int sys_sigpause (sigset_t new_mask); +sigset_t sys_sigblock (sigset_t new_mask); sigset_t sys_sigunblock (sigset_t new_mask); sigset_t sys_sigsetmask (sigset_t new_mask); |