50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
// Copyright (C) 2020 Storj Labs, Inc.
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// See LICENSE for copying information.
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// Package context2 contains utilities for contexts.
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package context2
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import (
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"context"
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"fmt"
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"time"
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)
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// WithoutCancellation returns a context that does not propagate Done message
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// down to children. However, Values are propagated.
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func WithoutCancellation(ctx context.Context) context.Context {
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return noCancelContext{ctx}
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}
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type noCancelContext struct {
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ctx context.Context
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}
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// Deadline returns the time when work done on behalf of this context
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// should be canceled.
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func (noCancelContext) Deadline() (deadline time.Time, ok bool) {
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return time.Time{}, false
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}
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// Done returns empty channel.
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func (noCancelContext) Done() <-chan struct{} {
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return nil
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}
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// Err always returns nil
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func (noCancelContext) Err() error {
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return nil
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}
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// String returns string.
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func (ctx noCancelContext) String() string {
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return fmt.Sprintf("no cancel (%s)", ctx.ctx)
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}
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// Value returns the value associated with this context for key, or nil
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// if no value is associated with key. Successive calls to Value with
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// the same key returns the same result.
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func (ctx noCancelContext) Value(key interface{}) interface{} {
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return ctx.ctx.Value(key)
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}
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