third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/src/google/protobuf/stubs/atomicops_internals_arm64_gcc.h

 // Protocol Buffers - Google's data interchange format
 // Copyright 2012 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
@@ skipping 19 matching lines @@
 
 // This file is an internal atomic implementation, use atomicops.h instead.
 
 #ifndef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_ARM64_GCC_H_
 #define GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_ARM64_GCC_H_
 
 namespace google {
 namespace protobuf {
 namespace internal {
 
-inline void MemoryBarrier() {
+inline void MemoryBarrierInternal() {
   __asm__ __volatile__ ("dmb ish" ::: "memory");  // NOLINT
 }
 
 // NoBarrier versions of the operation include "memory" in the clobber list.
 // This is not required for direct usage of the NoBarrier versions of the
 // operations. However this is required for correctness when they are used as
 // part of the Acquire or Release versions, to ensure that nothing from outside
 // the call is reordered between the operation and the memory barrier. This does
 // not change the code generated, so has no or minimal impact on the
 // NoBarrier operations.
@@ skipping 59 matching lines @@
       [ptr]"+Q" (*ptr)
     : [increment]"IJr" (increment)
     : "memory"
   );  // NOLINT
 
   return result;
 }
 
 inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr,
                                         Atomic32 increment) {
-  MemoryBarrier();
+  MemoryBarrierInternal();
   Atomic32 result = NoBarrier_AtomicIncrement(ptr, increment);
-  MemoryBarrier();
+  MemoryBarrierInternal();
 
   return result;
 }
 
 inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr,
                                        Atomic32 old_value,
                                        Atomic32 new_value) {
   Atomic32 prev = NoBarrier_CompareAndSwap(ptr, old_value, new_value);
-  MemoryBarrier();
+  MemoryBarrierInternal();
 
   return prev;
 }
 
 inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr,
                                        Atomic32 old_value,
                                        Atomic32 new_value) {
-  MemoryBarrier();
+  MemoryBarrierInternal();
   Atomic32 prev = NoBarrier_CompareAndSwap(ptr, old_value, new_value);
 
   return prev;
 }
 
 inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) {
   *ptr = value;
 }
 
 inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) {
   *ptr = value;
-  MemoryBarrier();
+  MemoryBarrierInternal();
 }
 
 inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) {
   __asm__ __volatile__ (  // NOLINT
     "stlr %w[value], %[ptr]  \n\t"
     : [ptr]"=Q" (*ptr)
     : [value]"r" (value)
     : "memory"
   );  // NOLINT
 }
 
 inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) {
   return *ptr;
 }
 
 inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) {
   Atomic32 value;
 
   __asm__ __volatile__ (  // NOLINT
     "ldar %w[value], %[ptr]  \n\t"
     : [value]"=r" (value)
     : [ptr]"Q" (*ptr)
     : "memory"
   );  // NOLINT
 
   return value;
 }
 
 inline Atomic32 Release_Load(volatile const Atomic32* ptr) {
-  MemoryBarrier();
+  MemoryBarrierInternal();
   return *ptr;
 }
 
 // 64-bit versions of the operations.
 // See the 32-bit versions for comments.
 
 inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr,
                                          Atomic64 old_value,
                                          Atomic64 new_value) {
   Atomic64 prev;
@@ skipping 54 matching lines @@
       [ptr]"+Q" (*ptr)
     : [increment]"IJr" (increment)
     : "memory"
   );  // NOLINT
 
   return result;
 }
 
 inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr,
                                         Atomic64 increment) {
-  MemoryBarrier();
+  MemoryBarrierInternal();
   Atomic64 result = NoBarrier_AtomicIncrement(ptr, increment);
-  MemoryBarrier();
+  MemoryBarrierInternal();
 
   return result;
 }
 
 inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr,
                                        Atomic64 old_value,
                                        Atomic64 new_value) {
   Atomic64 prev = NoBarrier_CompareAndSwap(ptr, old_value, new_value);
-  MemoryBarrier();
+  MemoryBarrierInternal();
 
   return prev;
 }
 
 inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr,
                                        Atomic64 old_value,
                                        Atomic64 new_value) {
-  MemoryBarrier();
+  MemoryBarrierInternal();
   Atomic64 prev = NoBarrier_CompareAndSwap(ptr, old_value, new_value);
 
   return prev;
 }
 
 inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) {
   *ptr = value;
 }
 
 inline void Acquire_Store(volatile Atomic64* ptr, Atomic64 value) {
   *ptr = value;
-  MemoryBarrier();
+  MemoryBarrierInternal();
 }
 
 inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) {
   __asm__ __volatile__ (  // NOLINT
     "stlr %x[value], %[ptr]  \n\t"
     : [ptr]"=Q" (*ptr)
     : [value]"r" (value)
     : "memory"
   );  // NOLINT
 }
 
 inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) {
   return *ptr;
 }
 
 inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) {
   Atomic64 value;
 
   __asm__ __volatile__ (  // NOLINT
     "ldar %x[value], %[ptr]  \n\t"
     : [value]"=r" (value)
     : [ptr]"Q" (*ptr)
     : "memory"
   );  // NOLINT
 
   return value;
 }
 
 inline Atomic64 Release_Load(volatile const Atomic64* ptr) {
-  MemoryBarrier();
+  MemoryBarrierInternal();
   return *ptr;
 }
 
 }  // namespace internal
 }  // namespace protobuf
 }  // namespace google
 
 #endif  // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_ARM64_GCC_H_