Tune scheduling a bit, avoid a binder ipc
Don't query running behind if it's not possible to be behind such
as having received a vsync since the last call to swap buffers.
This also avoids an accidental-starvation issue where if surface
flinger was a bit sluggish to dequeue then renderthread would drop
thinking the queue was full.
Also be a bit smarter about tracking if we've already drawn for this
vsync target to avoid producing two frames for the same vsync
Change-Id: Ib266500a693c27000b2e8ea578f111229d75147a
diff --git a/libs/hwui/utils/TimeUtils.h b/libs/hwui/utils/TimeUtils.h
new file mode 100644
index 0000000..8d42d7e
--- /dev/null
+++ b/libs/hwui/utils/TimeUtils.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef UTILS_TIMEUTILS_H
+#define UTILS_TIMEUTILS_H
+
+#include <utils/Timers.h>
+
+namespace android {
+namespace uirenderer {
+
+constexpr nsecs_t operator"" _ms (unsigned long long ms) {
+ return milliseconds_to_nanoseconds(ms);
+}
+
+} /* namespace uirenderer */
+} /* namespace android */
+
+#endif /* UTILS_TIMEUTILS_H */