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https://github.com/netbirdio/gvisor.git
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37 lines
1.1 KiB
Go
37 lines
1.1 KiB
Go
 
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// Copyright 2021 The gVisor Authors.
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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 linux
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import (
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"gvisor.dev/gvisor/pkg/context"
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)
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// contextID is the linux package's type for context.Context.Value keys.
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type contextID int
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const (
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// CtxSignalNoInfoFunc is a Context.Value key for a function to send signals.
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CtxSignalNoInfoFunc contextID = iota
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)
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// SignalNoInfoFuncFromContext returns a callback function that can be used to send a
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// signal to the given context.
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func SignalNoInfoFuncFromContext(ctx context.Context) func(Signal) error {
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if f := ctx.Value(CtxSignalNoInfoFunc); f != nil {
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return f.(func(Signal) error)
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}
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return nil
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}
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