diff options
Diffstat (limited to 'core/utils/utils.go')
-rw-r--r-- | core/utils/utils.go | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/core/utils/utils.go b/core/utils/utils.go index 8c9f77a..8486d28 100644 --- a/core/utils/utils.go +++ b/core/utils/utils.go @@ -18,6 +18,7 @@ package utils import ( + "context" "fmt" "github.com/dexon-foundation/dexon-consensus/common" @@ -92,3 +93,36 @@ func VerifyDKGComplaint( } return ok, nil } + +// LaunchDummyReceiver launches a go routine to receive from the receive +// channel of a network module. An context is required to stop the go routine +// automatically. An optinal message handler could be provided. +func LaunchDummyReceiver( + ctx context.Context, recv <-chan interface{}, handler func(interface{})) ( + context.CancelFunc, <-chan struct{}) { + var ( + dummyCtx, dummyCancel = context.WithCancel(ctx) + finishedChan = make(chan struct{}, 1) + ) + go func() { + defer func() { + finishedChan <- struct{}{} + }() + loop: + for { + select { + case <-dummyCtx.Done(): + break loop + case v, ok := <-recv: + if !ok { + panic(fmt.Errorf( + "receive channel is closed before dummy receiver")) + } + if handler != nil { + handler(v) + } + } + } + }() + return dummyCancel, finishedChan +} |