49 lines
1.5 KiB
Go
49 lines
1.5 KiB
Go
// Copyright 2019 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 pgalloc
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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 this package's type for context.Context.Value keys.
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type contextID int
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const (
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// CtxMemoryFile is a Context.Value key for a MemoryFile.
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CtxMemoryFile contextID = iota
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// CtxMemoryFileProvider is a Context.Value key for a MemoryFileProvider.
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CtxMemoryFileProvider
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)
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// MemoryFileFromContext returns the MemoryFile used by ctx, or nil if no such
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// MemoryFile exists.
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func MemoryFileFromContext(ctx context.Context) *MemoryFile {
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if v := ctx.Value(CtxMemoryFile); v != nil {
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return v.(*MemoryFile)
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}
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return nil
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}
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// MemoryFileProviderFromContext returns the MemoryFileProvider used by ctx, or nil if no such
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// MemoryFileProvider exists.
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func MemoryFileProviderFromContext(ctx context.Context) MemoryFileProvider {
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if v := ctx.Value(CtxMemoryFileProvider); v != nil {
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return v.(MemoryFileProvider)
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}
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return nil
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}
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