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44 lines
1.2 KiB
Go
44 lines
1.2 KiB
Go
// Copyright (C) 2025 mieru authors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package appctl
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import (
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"sync"
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"time"
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)
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var (
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appStartTime time.Time
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appStartTimeOnce sync.Once
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)
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// RecordAppStartTime record the app start time.
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// This function does nothing after the first use.
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func RecordAppStartTime() {
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appStartTimeOnce.Do(func() {
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appStartTime = time.Now()
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})
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}
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// Elapsed returns the how long the app has been started.
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// It panics if the start time is not recorded.
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func Elapsed() time.Duration {
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if appStartTime.IsZero() {
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panic("app start time is not recorded")
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}
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return time.Since(appStartTime).Truncate(time.Microsecond)
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}
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