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module ProcessSpecs
def self.clock_constants
clocks = []
platform_is_not :windows, :solaris do
clocks += Process.constants.select { |c| c.to_s.start_with?('CLOCK_') }
# These require CAP_WAKE_ALARM and are not documented in
# Process#clock_gettime. They return EINVAL if the permission
# is not granted.
clocks -= [:CLOCK_BOOTTIME_ALARM, :CLOCK_REALTIME_ALARM]
# These clocks in practice on Linux do not seem to match
# their reported resolution.
clocks -= [:CLOCK_REALTIME_COARSE, :CLOCK_MONOTONIC_COARSE]
clocks.map! { |c|
[c, Process.const_get(c)]
}
end
clocks
end
end
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