diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/sigsuspend.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sigsuspend.c | 45 |
1 files changed, 36 insertions, 9 deletions
diff --git a/sysdeps/unix/sysv/linux/sigsuspend.c b/sysdeps/unix/sysv/linux/sigsuspend.c index 443c855d6c..71c2baeda5 100644 --- a/sysdeps/unix/sysv/linux/sigsuspend.c +++ b/sysdeps/unix/sysv/linux/sigsuspend.c @@ -20,7 +20,7 @@ #include <signal.h> #include <unistd.h> -#include <sysdep.h> +#include <sysdep-cancel.h> #include <sys/syscall.h> #include <bp-checks.h> @@ -30,20 +30,15 @@ extern int __syscall_sigsuspend (int, unsigned long int, unsigned long int); extern int __syscall_rt_sigsuspend (const sigset_t *__unbounded, size_t); +#if !__ASSUME_REALTIME_SIGNALS /* The variable is shared between all wrappers around signal handling functions which have RT equivalents. The definition is in sigaction.c. */ extern int __libc_missing_rt_sigs; -/* Change the set of blocked signals to SET, - wait until a signal arrives, and restore the set of blocked signals. */ -int -__sigsuspend (set) - const sigset_t *set; +static int +do_sigsuspend (const sigset_t *set) { -#if __ASSUME_REALTIME_SIGNALS - return INLINE_SYSCALL (rt_sigsuspend, 2, CHECK_SIGSET (set), _NSIG / 8); -#else # ifdef __NR_rt_sigsuspend /* First try the RT signals. */ if (!__libc_missing_rt_sigs) @@ -62,6 +57,38 @@ __sigsuspend (set) # endif return INLINE_SYSCALL (sigsuspend, 3, 0, 0, set->__val[0]); +} +#endif + +/* Change the set of blocked signals to SET, + wait until a signal arrives, and restore the set of blocked signals. */ +int +__sigsuspend (set) + const sigset_t *set; +{ +#if __ASSUME_REALTIME_SIGNALS + if (SINGLE_THREAD_P) + return INLINE_SYSCALL (rt_sigsuspend, 2, CHECK_SIGSET (set), _NSIG / 8); + + int oldtype = LIBC_CANCEL_ASYNC (); + + int result = INLINE_SYSCALL (rt_sigsuspend, 2, CHECK_SIGSET (set), + _NSIG / 8); + + LIBC_CANCEL_RESET (oldtype); + + return result; +#else + if (SINGLE_THREAD_P) + return do_sigsuspend (set); + + int oldtype = LIBC_CANCEL_ASYNC (); + + int result = do_sigsuspend (set); + + LIBC_CANCEL_RESET (oldtype); + + return result; #endif } libc_hidden_def (__sigsuspend) |