45 lines
1.4 KiB
Go
45 lines
1.4 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 uniqueid defines context.Context keys for obtaining system-wide
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// unique identifiers.
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package uniqueid
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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 kernel package's type for context.Context.Value keys.
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type contextID int
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const (
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// CtxGlobalUniqueID is a Context.Value key for a system-wide
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// unique identifier.
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CtxGlobalUniqueID contextID = iota
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// CtxInotifyCookie is a Context.Value key for a unique inotify
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// event cookie.
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CtxInotifyCookie
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)
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// GlobalFromContext returns a system-wide unique identifier from ctx.
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func GlobalFromContext(ctx context.Context) uint64 {
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return ctx.Value(CtxGlobalUniqueID).(uint64)
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}
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// InotifyCookie generates a unique inotify event cookie from ctx.
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func InotifyCookie(ctx context.Context) uint32 {
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return ctx.Value(CtxInotifyCookie).(uint32)
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}
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