commit 3e2a2991783a4d0067b532ad6d0e607a756ac194
author Robert Carr <racarr@google.com> Fri Jun 11 13:42:55 2021 -0700
committer Robert Carr <racarr@google.com> Tue Jun 22 00:47:33 2021 -0700
tree f56919f73859af5897b6854497d04e238af7034f
parent 0aa188a360048c8e4c35a878d9416207c67bab26

Avoid traversal in tunnel mode reporter

We can just track whether we have a sideband stream or not using
a counter.

Test: Existing tests pass. simpleperf
Bug: 186200583
Change-Id: I40b0217c186517fc67fe55d8aecf26198561bc39

services/surfaceflinger/TunnelModeEnabledReporter.cpp

diff --git a/services/surfaceflinger/TunnelModeEnabledReporter.cpp b/services/surfaceflinger/TunnelModeEnabledReporter.cpp
index 48e3216..4497caf 100644
--- a/services/surfaceflinger/TunnelModeEnabledReporter.cpp
+++ b/services/surfaceflinger/TunnelModeEnabledReporter.cpp
@@ -26,17 +26,10 @@
 
 namespace android {
 
-TunnelModeEnabledReporter::TunnelModeEnabledReporter(SurfaceFlinger& flinger) : mFlinger(flinger) {}
+TunnelModeEnabledReporter::TunnelModeEnabledReporter() {}
 
 void TunnelModeEnabledReporter::updateTunnelModeStatus() {
-    bool tunnelModeEnabled = false;
-    mFlinger.mCurrentState.traverse([&](Layer* layer) {
-        auto& state = layer->getDrawingState();
-        if (state.sidebandStream != nullptr) {
-            tunnelModeEnabled = true;
-            return;
-        }
-    });
+    bool tunnelModeEnabled = mTunnelModeCount > 0;
     dispatchTunnelModeEnabled(tunnelModeEnabled);
 }