diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/sleep.c | 11 |
2 files changed, 14 insertions, 2 deletions
@@ -1,3 +1,8 @@ +1999-10-14 Andreas Jaeger <aj@suse.de> + + * sysdeps/unix/sysv/linux/sleep.c (__sleep): Optimize for zero + seconds. + 1999-10-12 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/i386/sys/ucontext.h: Don't define diff --git a/sysdeps/unix/sysv/linux/sleep.c b/sysdeps/unix/sysv/linux/sleep.c index 5fb11603cf..53968e86c2 100644 --- a/sysdeps/unix/sysv/linux/sleep.c +++ b/sysdeps/unix/sysv/linux/sleep.c @@ -1,5 +1,5 @@ /* Implementation of the POSIX sleep function using nanosleep. - Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. @@ -31,9 +31,12 @@ __sleep (unsigned int seconds) { struct timespec ts = { tv_sec: (long int) seconds, tv_nsec: 0 }; sigset_t set, oset; - struct sigaction oact; unsigned int result; + /* This is not necessary but some buggy programs depend on this. */ + if (seconds == 0) + return 0; + /* Linux will wake up the system call, nanosleep, when SIGCHLD arrives even if SIGCHLD is ignored. We have to deal with it in libc. We block SIGCHLD first. */ @@ -46,6 +49,10 @@ __sleep (unsigned int seconds) if (!__sigismember (&oset, SIGCHLD)) { int saved_errno; + struct sigaction oact; + + if (__sigemptyset (&set) < 0 || __sigaddset (&set, SIGCHLD) < 0) + return -1; /* We get the signal handler for SIGCHLD. */ if (__sigaction (SIGCHLD, (struct sigaction *) NULL, &oact) < 0) |