diff options
Diffstat (limited to 'gnulib/lib/xnanosleep.c')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/lib/xnanosleep.c | 58 |
2 files changed, 58 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/lib/xnanosleep.c b/gnulib/lib/xnanosleep.c new file mode 100644 index 0000000..442ddf5 --- /dev/null +++ b/gnulib/lib/xnanosleep.c @@ -0,0 +1,58 @@ +/* xnanosleep.c -- a more convenient interface to nanosleep + + Copyright (C) 2002-2007, 2009-2011 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +/* Mostly written (for sleep.c) by Paul Eggert. + Factored out (creating this file) by Jim Meyering. */ + +#include <config.h> + +#include "xnanosleep.h" + +#include <timespec.h> + +#include <errno.h> +#include <time.h> + +/* Sleep until the time (call it WAKE_UP_TIME) specified as + SECONDS seconds after the time this function is called. + SECONDS must be non-negative. If SECONDS is so large that + it is not representable as a `struct timespec', then use + the maximum value for that interval. Return -1 on failure + (setting errno), 0 on success. */ + +int +xnanosleep (double seconds) +{ + struct timespec ts_sleep = dtotimespec (seconds); + + for (;;) + { + /* Linux-2.6.8.1's nanosleep returns -1, but doesn't set errno + when resumed after being suspended. Earlier versions would + set errno to EINTR. nanosleep from linux-2.6.10, as well as + implementations by (all?) other vendors, doesn't return -1 + in that case; either it continues sleeping (if time remains) + or it returns zero (if the wake-up time has passed). */ + errno = 0; + if (nanosleep (&ts_sleep, NULL) == 0) + break; + if (errno != EINTR && errno != 0) + return -1; + } + + return 0; +} |