Initial commit

tools/parallel.go

@@ -0,0 +1,22 @@
+package tools
+
+import (
+	"code.google.com/p/go.net/context"
+)
+
+func SyncronizeParallelChain(ctx context.Context, fn func(context.Context)) {
+	var (
+		pcontexts = ctx.Value("parallel_contexts").(chan context.Context)
+		pfinished = ctx.Value("parallel_finished").(chan struct{})
+		working   = true
+	)
+
+	for len(pcontexts) > 0 || working {
+		select {
+		case pctx := <-pcontexts:
+			fn(pctx)
+		case <-pfinished:
+			working = false
+		}
+	}
+}