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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-10-24 17:52:30 +0000 |
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| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-10-30 17:05:14 -0300 |
| commit | 0d563783490bf5b2d7d52cab205760fdff5d5650 (patch) | |
| tree | e1578f3d2c36b1ee5b4f0fb84705141ebcf1d301 /sysdeps/generic/time-clockid.h | |
| parent | c3f9aef063cd9d5911e20d4f2b919ff2914c7965 (diff) | |
| download | glibc-0d563783490bf5b2d7d52cab205760fdff5d5650.tar.gz glibc-0d563783490bf5b2d7d52cab205760fdff5d5650.tar.xz glibc-0d563783490bf5b2d7d52cab205760fdff5d5650.zip | |
Use clock_gettime to implement time.
Change the default implementation of time to call clock_gettime, to align with new Linux ports that are expected to only implement __NR_clock_gettime. Arch-specific implementation that either call the time vDSO or route to gettimeofday vDSO are not removed. Also for Linux, CLOCK_REALTIME_COARSE is used instead of generic CLOCK_REALTIME clockid. This takes less CPU time and its behavior better matches what the current glibc does. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, powerpc64-linux-gnu, powerpc-linux-gnu, and aarch64-linux-gnu. Co-authored-by: Zack Weinberg <zackw@panix.com> Reviewed-by: Lukasz Majewski <lukma@denx.de>
Diffstat (limited to 'sysdeps/generic/time-clockid.h')
| -rw-r--r-- | sysdeps/generic/time-clockid.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/sysdeps/generic/time-clockid.h b/sysdeps/generic/time-clockid.h new file mode 100644 index 0000000000..13db6e6b5b --- /dev/null +++ b/sysdeps/generic/time-clockid.h @@ -0,0 +1,20 @@ +/* System specific time definitions. Generic Version. + Copyright 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/>. */ + +/* Timer used on clock_gettime for time implementation. */ +#define TIME_CLOCK_GETTIME_CLOCKID CLOCK_REALTIME |