60 lines
1.1 KiB
Go
60 lines
1.1 KiB
Go
package goprocessctx
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import (
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"context"
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"errors"
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"time"
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goprocess "github.com/jbenet/goprocess"
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)
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const (
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closing = iota
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closed
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)
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type procContext struct {
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done <-chan struct{}
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which int
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}
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// OnClosingContext derives a context from a given goprocess that will
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// be 'Done' when the process is closing
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func OnClosingContext(p goprocess.Process) context.Context {
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return &procContext{
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done: p.Closing(),
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which: closing,
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}
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}
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// OnClosedContext derives a context from a given goprocess that will
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// be 'Done' when the process is closed
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func OnClosedContext(p goprocess.Process) context.Context {
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return &procContext{
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done: p.Closed(),
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which: closed,
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}
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}
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func (c *procContext) Done() <-chan struct{} {
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return c.done
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}
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func (c *procContext) Deadline() (time.Time, bool) {
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return time.Time{}, false
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}
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func (c *procContext) Err() error {
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if c.which == closing {
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return errors.New("process closing")
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} else if c.which == closed {
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return errors.New("process closed")
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} else {
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panic("unrecognized process context type")
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}
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}
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func (c *procContext) Value(key interface{}) interface{} {
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return nil
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}
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