From f452968ae8f26a1d7ee062f4f63447c99671a6d7 Mon Sep 17 00:00:00 2001
From: Jooyung Han <jooyung@google.com>
Date: Thu, 23 Jan 2020 13:29:22 +0900
Subject: [PATCH] Use optional for nullable types

AIDL generates optional<T> for nullable T types for C++, which is more
efficient and idomatic and easy to use.

Bug: 144773267
Test: build/flash/boot
Merged-In: I90cf2ce1193c479179687d71a5c1416f6cdf0b16
Change-Id: I90cf2ce1193c479179687d71a5c1416f6cdf0b16
(cherry picked from commit ff7f4279bd7fa33577f5f4d46aa9de322fb625d4)

Exempt-From-Owner-Approval: CP from master
---
 cmds/idmap2/idmap2d/Idmap2Service.cpp | 6 +++---
 cmds/idmap2/idmap2d/Idmap2Service.h   | 4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/cmds/idmap2/idmap2d/Idmap2Service.cpp b/cmds/idmap2/idmap2d/Idmap2Service.cpp
index 8ee79f61520aa..d7237763a2e51 100644
--- a/cmds/idmap2/idmap2d/Idmap2Service.cpp
+++ b/cmds/idmap2/idmap2d/Idmap2Service.cpp
@@ -113,10 +113,10 @@ Status Idmap2Service::verifyIdmap(const std::string& overlay_apk_path,
 Status Idmap2Service::createIdmap(const std::string& target_apk_path,
                                   const std::string& overlay_apk_path, int32_t fulfilled_policies,
                                   bool enforce_overlayable, int32_t user_id ATTRIBUTE_UNUSED,
-                                  std::unique_ptr<std::string>* _aidl_return) {
+                                  std::optional<std::string>* _aidl_return) {
   assert(_aidl_return);
   SYSTRACE << "Idmap2Service::createIdmap " << target_apk_path << " " << overlay_apk_path;
-  _aidl_return->reset(nullptr);
+  _aidl_return->reset();
 
   const PolicyBitmask policy_bitmask = ConvertAidlArgToPolicyBitmask(fulfilled_policies);
 
@@ -155,7 +155,7 @@ Status Idmap2Service::createIdmap(const std::string& target_apk_path,
     return error("failed to write to idmap path " + idmap_path);
   }
 
-  *_aidl_return = std::make_unique<std::string>(idmap_path);
+  *_aidl_return = idmap_path;
   return ok();
 }
 
diff --git a/cmds/idmap2/idmap2d/Idmap2Service.h b/cmds/idmap2/idmap2d/Idmap2Service.h
index 1aab0598449bd..73a236a961af6 100644
--- a/cmds/idmap2/idmap2d/Idmap2Service.h
+++ b/cmds/idmap2/idmap2d/Idmap2Service.h
@@ -20,7 +20,7 @@
 #include <android-base/unique_fd.h>
 #include <binder/BinderService.h>
 
-#include <memory>
+#include <optional>
 #include <string>
 
 #include "android/os/BnIdmap2.h"
@@ -45,7 +45,7 @@ class Idmap2Service : public BinderService<Idmap2Service>, public BnIdmap2 {
   binder::Status createIdmap(const std::string& target_apk_path,
                              const std::string& overlay_apk_path, int32_t fulfilled_policies,
                              bool enforce_overlayable, int32_t user_id,
-                             std::unique_ptr<std::string>* _aidl_return);
+                             std::optional<std::string>* _aidl_return);
 };
 
 }  // namespace android::os