Mercurial > hg > octave-lyh > gnulib-hg
changeset 2052:3c79d37078c2
*** empty log message ***
author | Jim Meyering <jim@meyering.net> |
---|---|
date | Sat, 25 Dec 1999 22:15:23 +0000 |
parents | 20197e046796 |
children | 0d23f740f281 |
files | lib/nanosleep.c m4/nanosleep.m4 |
diffstat | 2 files changed, 96 insertions(+), 0 deletions(-) [+] |
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new file mode 100644 --- /dev/null +++ b/lib/nanosleep.c @@ -0,0 +1,62 @@ +/* Provide a replacement for the POSIX nanosleep function. + Copyright (C) 1999 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 2, 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, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +/* written by Jim Meyering */ + +#include <config.h> + +#include <sys/types.h> + +#include <time.h> +/* FIXME: is including both like this kosher? */ +#include <sys/time.h> + +static interrupted; + +/* Sleep for USEC microseconds. */ + +static void +usleep (const struct timespec *ts_delay) +{ + struct timeval tv_delay; + tv_delay.tv_sec = ts_delay->tv_sec; + tv_delay.tv_usec = 1000 * ts_delay->tv_nsec; + select (0, (void *) 0, (void *) 0, (void *) 0, tv_delay); +} + +int +nanosleep (const struct timespec *requested_delay, + struct timespec *remaining_delay) +{ + interrupted = 0; + + /* set up sig handler -- but maybe only do this the first time? */ + /* FIXME */ + + usleep (requested_delay); + + if (interrupted) + { + /* Calculate time remaining. */ + /* FIXME: the code in sleep doesn't use this, so there's no + rush to implement it. */ + } + + /* FIXME: Restore sig handler? */ + + return interrupted; +}
new file mode 100644 --- /dev/null +++ b/m4/nanosleep.m4 @@ -0,0 +1,34 @@ +#serial 1 + +dnl From Jim Meyering. +dnl FIXME +dnl + +AC_DEFUN(jm_FUNC_NANOSLEEP, +[ + AC_CACHE_CHECK([whether nanosleep works], + jm_cv_func_nanosleep_works, + [AC_TRY_RUN([ +# include <time.h> + + int + main () + { + struct timespec ts_sleep, ts_remaining; + ts_sleep.tv_sec = 0; + ts_sleep.tv_nsec = 1; + exit (nanosleep (&ts_sleep, &ts_remaining) == 0 ? 1 : 0); + } + ], + jm_cv_func_nanosleep_works=yes, + jm_cv_func_nanosleep_works=no, + dnl When crosscompiling, assume the worst. + jm_cv_func_nanosleep_works=yes) + ]) + if test $jm_cv_func_nanosleep_works = no; then + AC_SUBST(LIBOBJS) + LIBOBJS="$LIBOBJS nanosleep.$ac_objext" + AC_DEFINE_UNQUOTED(nanosleep, gnu_nanosleep, + [Define to gnu_nanosleep if the replacement function should be used.]) + fi +])