opensource/grpc-go
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

add more comments to metadata Fromcontext (#986)

Browse Source
This commit is contained in:
Menghan Li
2016-11-16 17:42:18 -08:00
committed by Qi Zhao
parent 8551858757
commit b13ef79499
1 changed files with 2 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
metadata/metadata.go
View File

@ -141,6 +141,8 @@ func NewContext(ctx context.Context, md MD) context.Context {
} }
// FromContext returns the MD in ctx if it exists. // FromContext returns the MD in ctx if it exists.
// The returned md should be immutable, writing to it may cause races.
// Modification should be made to the copies of the returned md.
func FromContext(ctx context.Context) (md MD, ok bool) { func FromContext(ctx context.Context) (md MD, ok bool) {
md, ok = ctx.Value(mdKey{}).(MD) md, ok = ctx.Value(mdKey{}).(MD)
return return