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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2019-10-24 17:52:30 +0000
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2019-10-30 17:05:14 -0300
commit0d563783490bf5b2d7d52cab205760fdff5d5650 (patch)
treee1578f3d2c36b1ee5b4f0fb84705141ebcf1d301 /include/time.h
parentc3f9aef063cd9d5911e20d4f2b919ff2914c7965 (diff)
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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 'include/time.h')
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