Skeleton of DM

dm/DMReporter.cpp

Index: dm/DMReporter.cpp
diff --git a/dm/DMReporter.cpp b/dm/DMReporter.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..80466ccf9ef7f53cee7c990ae3f475a5e321d334
--- /dev/null
+++ b/dm/DMReporter.cpp
@@ -0,0 +1,24 @@
+#include "DMReporter.h"
+
+namespace DM {
+
+void Reporter::UpdateStatusLine() const {
+    SkDebugf("\r\033[K%d / %d, %d failed", this->finished(), this->started(), this->failed());
+}
+
+int32_t Reporter::failed() const {
+    SkAutoMutexAcquire reader(&fMutex);
+    return fFailures.count();
+}
+
+void Reporter::fail(SkString name) {
+    SkAutoMutexAcquire writer(&fMutex);
+    fFailures.push_back(name);
+}
+
+void Reporter::getFailures(SkTArray<SkString>* failures) const {
+    SkAutoMutexAcquire reader(&fMutex);
+    *failures = fFailures;
+}
+
+}  // namespace DM