From ae0b80fcdc554ce3f67af69bb7f71c75efd9597c Mon Sep 17 00:00:00 2001
From: Android Tools Maintainers <android-tools-devel@lists.alioth.debian.org>
Date: Fri, 27 Jan 2023 05:43:52 +0000
Subject: [PATCH] Fix incompatibility between <stdatomic.h> and <atomic>

Bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60932
Bug: https://reviews.llvm.org/D45470

This 2 headers combined will cause errors for both GCC and Clang. This patch
makes sure only one of them is present at any time.

Gbp-Pq: Topic system/core
Gbp-Pq: Name stdatomic.patch
---
 system/core/libcutils/include/cutils/atomic.h | 16 ++++++++++++++++
 system/core/libcutils/include/cutils/trace.h  |  7 +++++++
 system/core/liblog/logger.h                   |  6 ++++++
 3 files changed, 29 insertions(+)

diff --git a/system/core/libcutils/include/cutils/atomic.h b/system/core/libcutils/include/cutils/atomic.h
index 0c88bfed..43cc5b3a 100644
--- a/system/core/libcutils/include/cutils/atomic.h
+++ b/system/core/libcutils/include/cutils/atomic.h
@@ -19,7 +19,23 @@
 
 #include <stdint.h>
 #include <sys/types.h>
+#ifdef __cplusplus
+#include <atomic>
+using std::atomic_compare_exchange_strong_explicit;
+using std::atomic_fetch_add_explicit;
+using std::atomic_fetch_or_explicit;
+using std::atomic_fetch_sub_explicit;
+using std::atomic_int_least32_t;
+using std::atomic_load_explicit;
+using std::atomic_store_explicit;
+using std::atomic_thread_fence;
+using std::memory_order::memory_order_acquire;
+using std::memory_order::memory_order_relaxed;
+using std::memory_order::memory_order_release;
+using std::memory_order::memory_order_seq_cst;
+#else
 #include <stdatomic.h>
+#endif
 
 #ifndef ANDROID_ATOMIC_INLINE
 #define ANDROID_ATOMIC_INLINE static inline
diff --git a/system/core/libcutils/include/cutils/trace.h b/system/core/libcutils/include/cutils/trace.h
index e12c32cf..4e8b6497 100644
--- a/system/core/libcutils/include/cutils/trace.h
+++ b/system/core/libcutils/include/cutils/trace.h
@@ -18,7 +18,14 @@
 #define _LIBS_CUTILS_TRACE_H
 
 #include <inttypes.h>
+#ifdef __cplusplus
+#include <atomic>
+using std::atomic_bool;
+using std::atomic_load_explicit;
+using std::memory_order_acquire;
+#else
 #include <stdatomic.h>
+#endif
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
diff --git a/system/core/liblog/logger.h b/system/core/liblog/logger.h
index ddff19dd..554e45e5 100644
--- a/system/core/liblog/logger.h
+++ b/system/core/liblog/logger.h
@@ -16,7 +16,13 @@
 
 #pragma once
 
+#ifdef __cplusplus
+#include <atomic>
+using std::atomic_int;
+using std::atomic_uintptr_t;
+#else
 #include <stdatomic.h>
+#endif
 #include <sys/cdefs.h>
 
 #include <log/log.h>
-- 
2.30.2