45 lines
1.3 KiB
Go
45 lines
1.3 KiB
Go
// Copyright 2018 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package time
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import (
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"gvisor.googlesource.com/gvisor/pkg/sentry/context"
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)
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// contextID is the time package's type for context.Context.Value keys.
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type contextID int
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const (
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// CtxRealtimeClock is a Context.Value key for the current real time.
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CtxRealtimeClock contextID = iota
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)
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// RealtimeClockFromContext returns the real time clock associated with context
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// ctx.
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func RealtimeClockFromContext(ctx context.Context) Clock {
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if v := ctx.Value(CtxRealtimeClock); v != nil {
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return v.(Clock)
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}
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return nil
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}
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// NowFromContext returns the current real time associated with context ctx.
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func NowFromContext(ctx context.Context) Time {
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if clk := RealtimeClockFromContext(ctx); clk != nil {
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return clk.Now()
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}
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panic("encountered context without RealtimeClock")
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}
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