chg(balancer): Even more pointers for Request.

diff --git a/concurrency-is-not-parallelism/balancer.go b/concurrency-is-not-parallelism/balancer.go
index d39d69e..cea7ea8 100644 (file)
--- a/concurrency-is-not-parallelism/balancer.go
+++ b/concurrency-is-not-parallelism/balancer.go
@@ -27,7 +27,7 @@ func furtherProcess(r *Request, result int) {
     fmt.Printf("%v: further processing result %v..\n", r, result)
 }
 
-func requester(work chan<- Request) {
+func requester(work chan<- *Request) {
     c := make(chan int)
     reqNum := 0
     for {
@@ -39,7 +39,7 @@ func requester(work chan<- Request) {
         fn := func () int { return workFn(req) }
         req.fn = fn
         fmt.Printf("requester() '%v': sending\n", req)
-        work <- *req
+        work <- req
         result := <-c
         fmt.Printf("requester() '%v': received result %v\n", req, result)
         furtherProcess(req, result)
@@ -51,7 +51,7 @@ func requester(work chan<- Request) {
 // FIXME: Add interfaces to abstreact from buffered/unbuffered channels and be
 // able to switch implementation immediately.
 type Worker struct {
-    requests chan Request
+    requests chan *Request
     pending int // Used by sort.
     num int     // Used for worker identification.
     index int   // Used by heap.
@@ -74,7 +74,7 @@ func (w *Worker) work(done chan<- *Done) {
         req := <- w.requests
         fmt.Printf("%v: start computing '%v'\n", w, req)
         req.c <- req.fn()
-        done <- &Done{w, &req}
+        done <- &Done{w, req}
         fmt.Printf("%v: finished '%v'\n", w, req)
     }
 }
@@ -110,7 +110,7 @@ type Balancer struct {
     done chan *Done
 }
 
-func (b *Balancer) balance(work <-chan Request) {
+func (b *Balancer) balance(work <-chan *Request) {
     timeout := time.After(20 * time.Second)
 out:
     for {
@@ -132,7 +132,7 @@ out:
     }
 }
 
-func (b *Balancer) dispatch(req Request) {
+func (b *Balancer) dispatch(req *Request) {
     w := heap.Pop(&b.pool).(*Worker)
     fmt.Printf("dispatch() '%v': sending to '%v'\n", req, w)
     go w.work(b.done)
@@ -152,11 +152,11 @@ func (b *Balancer) completed(done *Done) {
 var nWorker int = 4
 
 func main() {
-    work := make(chan Request)
+    work := make(chan *Request)
 
     pool := make(Pool, nWorker)
     for i := 0; i < nWorker; i++ {
-        requests := make(chan Request)
+        requests := make(chan *Request)
         pool[i] = &Worker{requests, 0, i, i}
     }
     heap.Init(&pool)