Skeleton of DM

dm/DMReporter.h

Index: dm/DMReporter.h
diff --git a/dm/DMReporter.h b/dm/DMReporter.h
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+++ b/dm/DMReporter.h
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+#ifndef DMReporter_DEFINED
+#define DMReporter_DEFINED
+
+#include "SkString.h"
+#include "SkTArray.h"
+#include "SkThread.h"
+#include "SkTypes.h"
+
+// Used to report status changes including failures.  All public methods are threadsafe.
+
+namespace DM {
+
+class Reporter : SkNoncopyable {
+public:
+    Reporter() : fStarted(0), fFinished(0) {}
+
+    void start()  { sk_atomic_inc(&fStarted); }
+    void finish() { sk_atomic_inc(&fFinished); }
+    void fail(SkString name);
+
+    int32_t started()  const { return fStarted; }
+    int32_t finished() const { return fFinished; }
+    int32_t failed()   const;
+
+    void updateStatusLine() const;
+
+    void getFailures(SkTArray<SkString>*) const;
+
+private:
+    int32_t fStarted, fFinished;
+
+    mutable SkMutex fMutex;  // Guards fFailures.
+    SkTArray<SkString> fFailures;
+};
+
+
+}  // namespace DM
+
+#endif  // DMReporter_DEFINED