commit abcdf5cf07d8321c0bc6224fc623fc19bbdc2b74
author Prabir Pradhan <prabirmsp@google.com> Fri Dec 15 07:30:22 2023 +0000
committer Prabir Pradhan <prabirmsp@google.com> Wed Jan 17 22:49:31 2024 +0000
tree f1f1d87da1cf5b489277da69bea16f9cca33b956
parent a57e6352c0dd4e3fee25229eed77cc68fc4c684d

InputDispatcher: Add InputTracerInterface for tracing input events

The interface documents how the tracer will interact with
InputDispatcher.

Bug: 210460522
Test: Build
Change-Id: Id97f9b0851f1248956b95e8b18b2302ecff1bff5

services/inputflinger/dispatcher/InputDispatcher.h

diff --git a/services/inputflinger/dispatcher/InputDispatcher.h b/services/inputflinger/dispatcher/InputDispatcher.h
index 3567288..5b45531 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.h
+++ b/services/inputflinger/dispatcher/InputDispatcher.h
@@ -32,6 +32,8 @@
 #include "Monitor.h"
 #include "TouchState.h"
 #include "TouchedWindow.h"
+#include "trace/InputTracerInterface.h"
+#include "trace/InputTracingBackendInterface.h"
 
 #include <attestation/HmacKeyManager.h>
 #include <gui/InputApplication.h>
@@ -82,6 +84,9 @@
     static constexpr bool kDefaultInTouchMode = true;
 
     explicit InputDispatcher(InputDispatcherPolicyInterface& policy);
+    // Constructor used for testing.
+    explicit InputDispatcher(InputDispatcherPolicyInterface&,
+                             std::unique_ptr<trace::InputTracingBackendInterface>);
     ~InputDispatcher() override;
 
     void dump(std::string& dump) const override;
@@ -172,6 +177,9 @@
     std::condition_variable mDispatcherIsAlive;
     mutable std::condition_variable mDispatcherEnteredIdle;
 
+    // Input event tracer. The tracer will only exist on builds where input tracing is allowed.
+    std::unique_ptr<trace::InputTracerInterface> mTracer GUARDED_BY(mLock);
+
     sp<Looper> mLooper;
 
     std::shared_ptr<const EventEntry> mPendingEvent GUARDED_BY(mLock);