fcb8d040e8
Instead of lengthy blurbs, switch to single-line, machine-readable standardized (https://spdx.dev) license identifiers. The Linux kernel switched long ago, so there is strong precedent. Three cases are handled: AGPL-only, Apache-only, and dual licensed. For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0), reasoning that our changes are extensive enough to apply our license. The changes we applied mechanically with a script, except to licenses/README.md. Closes #9937
51 lines
1.4 KiB
C++
51 lines
1.4 KiB
C++
/*
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* Copyright (C) 2015-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#pragma once
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#include <cstdint>
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#include <limits>
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#include <chrono>
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#include <string>
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#include "clocks-impl.hh"
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namespace api {
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using timestamp_type = int64_t;
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timestamp_type constexpr missing_timestamp = std::numeric_limits<timestamp_type>::min();
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timestamp_type constexpr min_timestamp = std::numeric_limits<timestamp_type>::min() + 1;
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timestamp_type constexpr max_timestamp = std::numeric_limits<timestamp_type>::max();
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// Used for generating server-side mutation timestamps.
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// Same epoch as Java's System.currentTimeMillis() for compatibility.
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// Satisfies requirements of Clock.
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class timestamp_clock final {
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using base = std::chrono::system_clock;
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public:
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using rep = timestamp_type;
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using duration = std::chrono::microseconds;
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using period = typename duration::period;
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using time_point = std::chrono::time_point<timestamp_clock, duration>;
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static constexpr bool is_steady = base::is_steady;
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static time_point now() {
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return time_point(std::chrono::duration_cast<duration>(base::now().time_since_epoch())) + get_clocks_offset();
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}
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};
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static inline
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timestamp_type new_timestamp() {
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return timestamp_clock::now().time_since_epoch().count();
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}
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}
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/* For debugging and log messages. */
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std::string format_timestamp(api::timestamp_type);
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