kubo/util/context.go
Henry 92d08db7a5 rewrote import paths of go.net/context to use golang.org/x/context
- updated go-ctxgroup and goprocess
ctxgroup: AddChildGroup was changed to AddChild. Used in two files:
- p2p/net/mock/mock_net.go
- routing/dht/dht.go

- updated context from hg repo to git
prev. commit in hg was ad01a6fcc8a19d3a4478c836895ffe883bd2ceab. (context: make parentCancelCtx iterative)
represents commit 84f8955a887232b6308d79c68b8db44f64df455c in git repo

- updated context to master (b6fdb7d8a4ccefede406f8fe0f017fb58265054c)

Aaron Jacobs (2):
net/context: Don't accept a context in the DoSomethingSlow example.
context: Be clear that users must cancel the result of WithCancel.

Andrew Gerrand (1):
go.net: use golang.org/x/... import paths

Bryan C. Mills (1):
net/context: Don't leak goroutines in Done example.

Damien Neil (1):
context: fix removal of cancelled timer contexts from parent

David Symonds (2):
context: Fix WithValue example code.
net: add import comments.

Sameer Ajmani (1):
context: fix TestAllocs to account for ints in interfaces
2015-02-25 11:58:19 +01:00

36 lines
1.1 KiB
Go

package util
import (
context "github.com/jbenet/go-ipfs/Godeps/_workspace/src/golang.org/x/net/context"
)
// privateChanType protects the channel. Since this is a package-private type,
// only methods defined in this package can get the error value from the
// context.
type privateChanType chan error
const errLogKey = "the key used to extract the error log from the context"
// ContextWithErrorLog returns a copy of parent and an error channel that can
// be used to receive errors sent with the LogError method.
func ContextWithErrorLog(parent context.Context) (context.Context, <-chan error) {
errs := make(privateChanType)
ctx := context.WithValue(parent, errLogKey, errs)
return ctx, errs
}
// LogError logs the error to the owner of the context.
//
// If this context was created with ContextWithErrorLog, then this method
// passes the error to context creator over an unbuffered channel.
//
// If this context was created by other means, this method is a no-op.
func LogError(ctx context.Context, err error) {
v := ctx.Value(errLogKey)
errs, ok := v.(privateChanType)
if !ok {
return
}
errs <- err
}