diff options
| author | Ulrich Drepper <drepper@redhat.com> | 2002-10-11 07:14:39 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2002-10-11 07:14:39 +0000 |
| commit | db7ffaa3042e02121120a6086aba01c9cecfc46f (patch) | |
| tree | 9036afafa0dc593bfc901bf56fb798df95fff243 /sysdeps/generic/pselect.c | |
| parent | 85adacbd9943fbd8f02151f08d6e5e728a4155ac (diff) | |
| download | glibc-db7ffaa3042e02121120a6086aba01c9cecfc46f.tar.gz | |
Avoid unnecessary sigprocmask calls.
Diffstat (limited to 'sysdeps/generic/pselect.c')
| -rw-r--r-- | sysdeps/generic/pselect.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/sysdeps/generic/pselect.c b/sysdeps/generic/pselect.c index 29f4beaf97..031540e81d 100644 --- a/sysdeps/generic/pselect.c +++ b/sysdeps/generic/pselect.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1996, 1997, 1998, 2001 Free Software Foundation, Inc. +/* Copyright (C) 1996, 1997, 1998, 2001, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. @@ -42,7 +42,7 @@ __pselect (nfds, readfds, writefds, exceptfds, timeout, sigmask) int retval; sigset_t savemask; - /* Change nanosecond number to microseconds. This may loose + /* Change nanosecond number to microseconds. This might mean losing precision and therefore the `pselect` should be available. But for now it is hardly found. */ if (timeout != NULL) @@ -51,10 +51,14 @@ __pselect (nfds, readfds, writefds, exceptfds, timeout, sigmask) /* The setting and restoring of the signal mask and the select call should be an atomic operation. This can't be done without kernel help. */ - __sigprocmask (SIG_SETMASK, sigmask, &savemask); + if (sigmask != NULL) + __sigprocmask (SIG_SETMASK, sigmask, &savemask); + retval = __select (nfds, readfds, writefds, exceptfds, timeout != NULL ? &tval : NULL); - __sigprocmask (SIG_SETMASK, &savemask, NULL); + + if (sigmask != NULL) + __sigprocmask (SIG_SETMASK, &savemask, NULL); return retval; } |