From ac89d92625a0ebf7ba70de0412b38e5cefdf2dda Mon Sep 17 00:00:00 2001 From: Alexey Kopytov Date: Thu, 1 Jul 2010 12:02:00 +0400 Subject: Bug#54667: Unnecessary signal handler redefinition POSIX requires that a signal handler defined with sigaction() is not reset on delivering a signal unless SA_NODEFER or SA_RESETHAND is set. It is therefore unnecessary to redefine the handler on signal delivery on platforms where sigaction() is used without those flags. --- include/my_alarm.h | 4 ++-- include/my_global.h | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) (limited to 'include') diff --git a/include/my_alarm.h b/include/my_alarm.h index 750135d64ed..c41c1d65e27 100644 --- a/include/my_alarm.h +++ b/include/my_alarm.h @@ -36,14 +36,14 @@ extern ulong my_time_to_wait_for_lock; #define ALARM_END VOID(signal(SIGALRM,alarm_signal)); \ VOID(alarm(alarm_old)); #define ALARM_TEST my_have_got_alarm -#ifdef DONT_REMEMBER_SIGNAL +#ifdef SIGNAL_HANDLER_RESET_ON_DELIVERY #define ALARM_REINIT VOID(alarm(MY_HOW_OFTEN_TO_ALARM)); \ VOID(signal(SIGALRM,my_set_alarm_variable));\ my_have_got_alarm=0; #else #define ALARM_REINIT VOID(alarm((uint) MY_HOW_OFTEN_TO_ALARM)); \ my_have_got_alarm=0; -#endif /* DONT_REMEMBER_SIGNAL */ +#endif /* SIGNAL_HANDLER_RESET_ON_DELIVERY */ #else #define ALARM_VARIABLES long alarm_pos=0,alarm_end_pos=MY_HOW_OFTEN_TO_WRITE-1 #define ALARM_INIT diff --git a/include/my_global.h b/include/my_global.h index e284acce186..e13c7c37b62 100644 --- a/include/my_global.h +++ b/include/my_global.h @@ -541,8 +541,8 @@ extern "C" int madvise(void *addr, size_t len, int behav); #endif /* Does the system remember a signal handler after a signal ? */ -#ifndef HAVE_BSD_SIGNALS -#define DONT_REMEMBER_SIGNAL +#if !defined(HAVE_BSD_SIGNALS) && !defined(HAVE_SIGACTION) +#define SIGNAL_HANDLER_RESET_ON_DELIVERY #endif /* Define void to stop lint from generating "null effekt" comments */ -- cgit v1.2.1