core/bloombits: use atomic type (ethereum#26993)

core/bloombits/matcher.go

@@ -83,7 +83,7 @@ type Matcher struct {
 	retrievals chan chan *Retrieval // Retriever processes waiting for task allocations
 	deliveries chan *Retrieval      // Retriever processes waiting for task response deliveries
 
-	running uint32 // Atomic flag whether a session is live or not
+	running atomic.Bool // Atomic flag whether a session is live or not
 }
 
 // NewMatcher creates a new pipeline for retrieving bloom bit streams and doing
@@ -146,10 +146,10 @@ func (m *Matcher) addScheduler(idx uint) {
 // channel is closed.
 func (m *Matcher) Start(ctx context.Context, begin, end uint64, results chan uint64) (*MatcherSession, error) {
 	// Make sure we're not creating concurrent sessions
-	if atomic.SwapUint32(&m.running, 1) == 1 {
+	if m.running.Swap(true) {
 		return nil, errors.New("matcher already running")
 	}
-	defer atomic.StoreUint32(&m.running, 0)
+	defer m.running.Store(false)
 
 	// Initiate a new matching round
 	session := &MatcherSession{

core/bloombits/matcher_test.go

@@ -160,7 +160,7 @@ func testMatcher(t *testing.T, filter [][]bloomIndexes, start, blocks uint64, in
 		}
 	}
 	// Track the number of retrieval requests made
-	var requested uint32
+	var requested atomic.Uint32
 
 	// Start the matching session for the filter and the retriever goroutines
 	quit := make(chan struct{})
@@ -208,15 +208,15 @@ func testMatcher(t *testing.T, filter [][]bloomIndexes, start, blocks uint64, in
 	session.Close()
 	close(quit)
 
-	if retrievals != 0 && requested != retrievals {
-		t.Errorf("filter = %v  blocks = %v  intermittent = %v: request count mismatch, have #%v, want #%v", filter, blocks, intermittent, requested, retrievals)
+	if retrievals != 0 && requested.Load() != retrievals {
+		t.Errorf("filter = %v  blocks = %v  intermittent = %v: request count mismatch, have #%v, want #%v", filter, blocks, intermittent, requested.Load(), retrievals)
 	}
-	return requested
+	return requested.Load()
 }
 
 // startRetrievers starts a batch of goroutines listening for section requests
 // and serving them.
-func startRetrievers(session *MatcherSession, quit chan struct{}, retrievals *uint32, batch int) {
+func startRetrievers(session *MatcherSession, quit chan struct{}, retrievals *atomic.Uint32, batch int) {
 	requests := make(chan chan *Retrieval)
 
 	for i := 0; i < 10; i++ {
@@ -238,7 +238,7 @@ func startRetrievers(session *MatcherSession, quit chan struct{}, retrievals *ui
 					for i, section := range task.Sections {
 						if rand.Int()%4 != 0 { // Handle occasional missing deliveries
 							task.Bitsets[i] = generateBitset(task.Bit, section)
-							atomic.AddUint32(retrievals, 1)
+							retrievals.Add(1)
 						}
 					}
 					request <- task

core/bloombits/scheduler_test.go

@@ -45,13 +45,13 @@ func testScheduler(t *testing.T, clients int, fetchers int, requests int) {
 	fetch := make(chan *request, 16)
 	defer close(fetch)
 
-	var delivered uint32
+	var delivered atomic.Uint32
 	for i := 0; i < fetchers; i++ {
 		go func() {
 			defer fetchPend.Done()
 
 			for req := range fetch {
-				atomic.AddUint32(&delivered, 1)
+				delivered.Add(1)
 
 				f.deliver([]uint64{
 					req.section + uint64(requests), // Non-requested data (ensure it doesn't go out of bounds)
@@ -97,7 +97,7 @@ func testScheduler(t *testing.T, clients int, fetchers int, requests int) {
 	}
 	pend.Wait()
 
-	if have := atomic.LoadUint32(&delivered); int(have) != requests {
+	if have := delivered.Load(); int(have) != requests {
 		t.Errorf("request count mismatch: have %v, want %v", have, requests)
 	}
 }