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Avoid unnecessary sigprocmask calls.

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This commit is contained in:
Ulrich Drepper 2002-10-11 07:14:39 +00:00
parent 85adacbd99
commit db7ffaa304
1 changed files with 8 additions and 4 deletions
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12
sysdeps/generic/pselect.c
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@ -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;
}