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author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-11-05 21:37:44 +0000 |
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committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-11-06 14:47:02 -0300 |
commit | 3537ecb49cf7177274607004c562d6f9ecc99474 (patch) | |
tree | 7321853007814993f485345e97b9b2ff61032a0c /sysdeps/unix/clock_nanosleep.c | |
parent | 79a547b162657b3fa34d31917cc29f0e7af19e4c (diff) | |
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Refactor nanosleep in terms of clock_nanosleep
The generic version is straightforward. For Hurd, its nanosleep
implementation is moved to clock_nanosleep with adjustments from
generic unix implementation.
The generic clock_nanosleep unix version is also removed since
it calls nanosleep.
Checked on x86_64-linux-gnu and powerpc64le-linux-gnu.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
Diffstat (limited to 'sysdeps/unix/clock_nanosleep.c')
-rw-r--r-- | sysdeps/unix/clock_nanosleep.c | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/sysdeps/unix/clock_nanosleep.c b/sysdeps/unix/clock_nanosleep.c deleted file mode 100644 index 8514a439ee..0000000000 --- a/sysdeps/unix/clock_nanosleep.c +++ /dev/null @@ -1,86 +0,0 @@ -/* High-resolution sleep with the specified clock. - Copyright (C) 2000-2019 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <https://www.gnu.org/licenses/>. */ - -#include <assert.h> -#include <errno.h> -#include <time.h> -#include <sysdep-cancel.h> -#include <shlib-compat.h> - -/* This implementation assumes that these is only a `nanosleep' system - call. So we have to remap all other activities. */ -int -__clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req, - struct timespec *rem) -{ - struct timespec now; - - if (! valid_nanoseconds (req->tv_nsec)) - return EINVAL; - - if (clock_id == CLOCK_THREAD_CPUTIME_ID) - return EINVAL; /* POSIX specifies EINVAL for this case. */ - - if (clock_id < CLOCK_REALTIME || clock_id > CLOCK_THREAD_CPUTIME_ID) - return EINVAL; - - /* If we got an absolute time, remap it. */ - if (flags == TIMER_ABSTIME) - { - long int nsec; - long int sec; - - /* Make sure we use safe data types. */ - assert (sizeof (sec) >= sizeof (now.tv_sec)); - - /* Get the current time for this clock. */ - if (__clock_gettime (clock_id, &now) != 0) - return errno; - - /* Compute the difference. */ - nsec = req->tv_nsec - now.tv_nsec; - sec = req->tv_sec - now.tv_sec - (nsec < 0); - if (sec < 0) - /* The time has already elapsed. */ - return 0; - - now.tv_sec = sec; - now.tv_nsec = nsec + (nsec < 0 ? 1000000000 : 0); - - /* From now on this is our time. */ - req = &now; - - /* Make sure we are not modifying the struct pointed to by REM. */ - rem = NULL; - } - else if (flags != 0) - return EINVAL; - else if (clock_id != CLOCK_REALTIME) - /* Not supported. */ - return ENOTSUP; - - return __nanosleep (req, rem), 0 ? errno : 0; -} - -versioned_symbol (libc, __clock_nanosleep, clock_nanosleep, GLIBC_2_17); -/* clock_nanosleep moved to libc in version 2.17; - old binaries may expect the symbol version it had in librt. */ -#if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_17) -strong_alias (__clock_nanosleep, __clock_nanosleep_2); -compat_symbol (libc, __clock_nanosleep_2, clock_nanosleep, GLIBC_2_2); -#endif |