From db5e7dccdb13a463453eb2b592e413b93ac31bd6 Mon Sep 17 00:00:00 2001
From: Joe Bolinger <jbolinger@google.com>
Date: Thu, 11 Nov 2021 17:05:35 -0800
Subject: [PATCH] Add dedicated biometrics sysui thread.

Bug: 205875955
Test: manual

Change-Id: Ibc3b70a2f7beb99315b10317dc177dbed64bf2fa
---
 .../biometrics/dagger/BiometricsModule.kt     | 49 +++++++++++++++++++
 .../systemui/dagger/SystemUIModule.java       |  2 +
 2 files changed, 51 insertions(+)
 create mode 100644 packages/SystemUI/src/com/android/systemui/biometrics/dagger/BiometricsModule.kt

diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/dagger/BiometricsModule.kt b/packages/SystemUI/src/com/android/systemui/biometrics/dagger/BiometricsModule.kt
new file mode 100644
index 0000000000000..b5d81f2539161
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/dagger/BiometricsModule.kt
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+
+package com.android.systemui.biometrics.dagger
+
+import com.android.systemui.dagger.SysUISingleton
+import com.android.systemui.util.concurrency.ThreadFactory
+import dagger.Module
+import dagger.Provides
+import java.util.concurrent.Executor
+import javax.inject.Qualifier
+
+/**
+ * Dagger module for all things biometric.
+ */
+@Module
+object BiometricsModule {
+
+    /** Background [Executor] for HAL related operations. */
+    @Provides
+    @SysUISingleton
+    @JvmStatic
+    @BiometricsBackground
+    fun providesPluginExecutor(threadFactory: ThreadFactory): Executor =
+        threadFactory.buildExecutorOnNewThread("biometrics")
+}
+
+/**
+ * Background executor for HAL operations that are latency sensitive but too
+ * slow to run on the main thread. Prefer the shared executors, such as
+ * [com.android.systemui.dagger.qualifiers.Background] when a HAL is not directly involved.
+ */
+@Qualifier
+@MustBeDocumented
+@Retention(AnnotationRetention.RUNTIME)
+annotation class BiometricsBackground
diff --git a/packages/SystemUI/src/com/android/systemui/dagger/SystemUIModule.java b/packages/SystemUI/src/com/android/systemui/dagger/SystemUIModule.java
index 3c867603546a6..bf8389e131344 100644
--- a/packages/SystemUI/src/com/android/systemui/dagger/SystemUIModule.java
+++ b/packages/SystemUI/src/com/android/systemui/dagger/SystemUIModule.java
@@ -30,6 +30,7 @@ import com.android.systemui.SystemUIFactory;
 import com.android.systemui.appops.dagger.AppOpsModule;
 import com.android.systemui.assist.AssistModule;
 import com.android.systemui.biometrics.UdfpsHbmProvider;
+import com.android.systemui.biometrics.dagger.BiometricsModule;
 import com.android.systemui.classifier.FalsingModule;
 import com.android.systemui.communal.dagger.CommunalModule;
 import com.android.systemui.controls.dagger.ControlsModule;
@@ -103,6 +104,7 @@ import dagger.Provides;
 @Module(includes = {
             AppOpsModule.class,
             AssistModule.class,
+            BiometricsModule.class,
             ClockModule.class,
             CommunalModule.class,
             DreamModule.class,