Initial QSfera import

Server/vendor/github.com/davidbyttow/govips/v2/vips/stats.go

@@ -0,0 +1,56 @@
+package vips
+
+import "sync"
+
+// RuntimeStats is a data structure to house a map of govips operation counts
+type RuntimeStats struct {
+	OperationCounts map[string]int64
+}
+
+var (
+	operationCounter chan string
+	runtimeStats     *RuntimeStats
+	statLock         sync.RWMutex
+)
+
+func incOpCounter(op string) {
+	if operationCounter != nil {
+		operationCounter <- op
+	}
+}
+
+func collectStats() chan struct{} {
+	operationCounter = make(chan string, 100)
+	done := make(chan struct{})
+	exit := false
+	go func() {
+		for !exit {
+			select {
+			case op := <-operationCounter:
+				statLock.Lock()
+				runtimeStats.OperationCounts[op] = runtimeStats.OperationCounts[op] + 1
+				statLock.Unlock()
+			case <-done:
+				exit = true
+				break
+			}
+		}
+	}()
+	return done
+}
+
+// ReadRuntimeStats returns operation counts for govips
+func ReadRuntimeStats(stats *RuntimeStats) {
+	statLock.RLock()
+	defer statLock.RUnlock()
+	stats.OperationCounts = make(map[string]int64)
+	for k, v := range runtimeStats.OperationCounts {
+		stats.OperationCounts[k] = v
+	}
+}
+
+func init() {
+	runtimeStats = &RuntimeStats{
+		OperationCounts: make(map[string]int64),
+	}
+}