Merge pull request #4439 from acozzette/remove-atomicops-stub
Removed atomicops.h stubpull/4442/head
Adam Cozzette
7 years ago
committed by
GitHub
commit
d3d7cdbcad
2 changed files with 1 additions and 238 deletions
@ -1,237 +0,0 @@ |
|||||||
// 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.
|
|
||||||
// * Redistributions in binary form must reproduce the above
|
|
||||||
// copyright notice, this list of conditions and the following disclaimer
|
|
||||||
// in the documentation and/or other materials provided with the
|
|
||||||
// distribution.
|
|
||||||
// * Neither the name of Google Inc. nor the names of its
|
|
||||||
// contributors may be used to endorse or promote products derived from
|
|
||||||
// this software without specific prior written permission.
|
|
||||||
//
|
|
||||||
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
||||||
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
||||||
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
||||||
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
||||||
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
||||||
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
||||||
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
||||||
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
||||||
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
||||||
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
||||||
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
||||||
|
|
||||||
// The routines exported by this module are subtle. If you use them, even if
|
|
||||||
// you get the code right, it will depend on careful reasoning about atomicity
|
|
||||||
// and memory ordering; it will be less readable, and harder to maintain. If
|
|
||||||
// you plan to use these routines, you should have a good reason, such as solid
|
|
||||||
// evidence that performance would otherwise suffer, or there being no
|
|
||||||
// alternative. You should assume only properties explicitly guaranteed by the
|
|
||||||
// specifications in this file. You are almost certainly _not_ writing code
|
|
||||||
// just for the x86; if you assume x86 semantics, x86 hardware bugs and
|
|
||||||
// implementations on other archtectures will cause your code to break. If you
|
|
||||||
// do not know what you are doing, avoid these routines, and use a Mutex.
|
|
||||||
//
|
|
||||||
// It is incorrect to make direct assignments to/from an atomic variable.
|
|
||||||
// You should use one of the Load or Store routines. The NoBarrier
|
|
||||||
// versions are provided when no barriers are needed:
|
|
||||||
// NoBarrier_Store()
|
|
||||||
// NoBarrier_Load()
|
|
||||||
// Although there are currently no compiler enforcement, you are encouraged
|
|
||||||
// to use these.
|
|
||||||
|
|
||||||
// This header and the implementations for each platform (located in
|
|
||||||
// atomicops_internals_*) must be kept in sync with the upstream code (V8).
|
|
||||||
|
|
||||||
#ifndef GOOGLE_PROTOBUF_ATOMICOPS_H_ |
|
||||||
#define GOOGLE_PROTOBUF_ATOMICOPS_H_ |
|
||||||
|
|
||||||
// Don't include this file for people not concerned about thread safety.
|
|
||||||
#ifndef GOOGLE_PROTOBUF_NO_THREAD_SAFETY |
|
||||||
|
|
||||||
#include <google/protobuf/stubs/common.h> |
|
||||||
#include <google/protobuf/stubs/platform_macros.h> |
|
||||||
|
|
||||||
namespace google { |
|
||||||
namespace protobuf { |
|
||||||
namespace internal { |
|
||||||
|
|
||||||
#ifdef GOOGLE_PROTOBUF_ARCH_32_BIT |
|
||||||
typedef intptr_t Atomic32; |
|
||||||
typedef int64 Atomic64; |
|
||||||
#else |
|
||||||
// We need to be able to go between Atomic64 and AtomicWord implicitly. This
|
|
||||||
// means Atomic64 and AtomicWord should be the same type on 64-bit.
|
|
||||||
#if defined(__ILP32__) || defined(GOOGLE_PROTOBUF_OS_NACL) |
|
||||||
// NaCl's intptr_t is not actually 64-bits on 64-bit!
|
|
||||||
// http://code.google.com/p/nativeclient/issues/detail?id=1162
|
|
||||||
// sparcv9's pointer type is 32bits
|
|
||||||
typedef intptr_t Atomic32; |
|
||||||
typedef int64 Atomic64; |
|
||||||
#else |
|
||||||
typedef int32 Atomic32; |
|
||||||
typedef intptr_t Atomic64; |
|
||||||
#endif |
|
||||||
#endif |
|
||||||
|
|
||||||
// Use AtomicWord for a machine-sized pointer. It will use the Atomic32 or
|
|
||||||
// Atomic64 routines below, depending on your architecture.
|
|
||||||
typedef intptr_t AtomicWord; |
|
||||||
|
|
||||||
// Atomically execute:
|
|
||||||
// result = *ptr;
|
|
||||||
// if (*ptr == old_value)
|
|
||||||
// *ptr = new_value;
|
|
||||||
// return result;
|
|
||||||
//
|
|
||||||
// I.e., replace "*ptr" with "new_value" if "*ptr" used to be "old_value".
|
|
||||||
// Always return the old value of "*ptr"
|
|
||||||
//
|
|
||||||
// This routine implies no memory barriers.
|
|
||||||
Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr, |
|
||||||
Atomic32 old_value, |
|
||||||
Atomic32 new_value); |
|
||||||
|
|
||||||
// Atomically store new_value into *ptr, returning the previous value held in
|
|
||||||
// *ptr. This routine implies no memory barriers.
|
|
||||||
Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr, Atomic32 new_value); |
|
||||||
|
|
||||||
// Atomically increment *ptr by "increment". Returns the new value of
|
|
||||||
// *ptr with the increment applied. This routine implies no memory barriers.
|
|
||||||
Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr, Atomic32 increment); |
|
||||||
|
|
||||||
Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr, |
|
||||||
Atomic32 increment); |
|
||||||
|
|
||||||
// These following lower-level operations are typically useful only to people
|
|
||||||
// implementing higher-level synchronization operations like spinlocks,
|
|
||||||
// mutexes, and condition-variables. They combine CompareAndSwap(), a load, or
|
|
||||||
// a store with appropriate memory-ordering instructions. "Acquire" operations
|
|
||||||
// ensure that no later memory access can be reordered ahead of the operation.
|
|
||||||
// "Release" operations ensure that no previous memory access can be reordered
|
|
||||||
// after the operation. "Barrier" operations have both "Acquire" and "Release"
|
|
||||||
// semantics. A MemoryBarrierInternal() has "Barrier" semantics, but does no
|
|
||||||
// memory access.
|
|
||||||
Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr, |
|
||||||
Atomic32 old_value, |
|
||||||
Atomic32 new_value); |
|
||||||
Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr, |
|
||||||
Atomic32 old_value, |
|
||||||
Atomic32 new_value); |
|
||||||
|
|
||||||
// This function was renamed from MemoryBarrier to MemoryBarrierInternal
|
|
||||||
// because MemoryBarrier is a define in Windows ARM builds and we do not
|
|
||||||
// undefine it because we call it from this function.
|
|
||||||
void MemoryBarrierInternal(); |
|
||||||
void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value); |
|
||||||
void Acquire_Store(volatile Atomic32* ptr, Atomic32 value); |
|
||||||
void Release_Store(volatile Atomic32* ptr, Atomic32 value); |
|
||||||
|
|
||||||
Atomic32 NoBarrier_Load(volatile const Atomic32* ptr); |
|
||||||
Atomic32 Acquire_Load(volatile const Atomic32* ptr); |
|
||||||
Atomic32 Release_Load(volatile const Atomic32* ptr); |
|
||||||
|
|
||||||
// 64-bit atomic operations (only available on 64-bit processors).
|
|
||||||
#ifdef GOOGLE_PROTOBUF_ARCH_64_BIT |
|
||||||
Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr, |
|
||||||
Atomic64 old_value, |
|
||||||
Atomic64 new_value); |
|
||||||
Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr, Atomic64 new_value); |
|
||||||
Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr, Atomic64 increment); |
|
||||||
Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr, Atomic64 increment); |
|
||||||
|
|
||||||
Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr, |
|
||||||
Atomic64 old_value, |
|
||||||
Atomic64 new_value); |
|
||||||
Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr, |
|
||||||
Atomic64 old_value, |
|
||||||
Atomic64 new_value); |
|
||||||
void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value); |
|
||||||
void Acquire_Store(volatile Atomic64* ptr, Atomic64 value); |
|
||||||
void Release_Store(volatile Atomic64* ptr, Atomic64 value); |
|
||||||
Atomic64 NoBarrier_Load(volatile const Atomic64* ptr); |
|
||||||
Atomic64 Acquire_Load(volatile const Atomic64* ptr); |
|
||||||
Atomic64 Release_Load(volatile const Atomic64* ptr); |
|
||||||
#endif // GOOGLE_PROTOBUF_ARCH_64_BIT
|
|
||||||
|
|
||||||
} // namespace internal
|
|
||||||
} // namespace protobuf
|
|
||||||
} // namespace google
|
|
||||||
|
|
||||||
// Include our platform specific implementation.
|
|
||||||
#define GOOGLE_PROTOBUF_ATOMICOPS_ERROR \ |
|
||||||
"Atomic operations are not supported on your platform" |
|
||||||
|
|
||||||
// ThreadSanitizer, http://clang.llvm.org/docs/ThreadSanitizer.html.
|
|
||||||
#if defined(THREAD_SANITIZER) |
|
||||||
#include <google/protobuf/stubs/atomicops_internals_tsan.h> |
|
||||||
// MSVC.
|
|
||||||
#elif defined(_MSC_VER) |
|
||||||
#if defined(GOOGLE_PROTOBUF_ARCH_IA32) || defined(GOOGLE_PROTOBUF_ARCH_X64) || defined(GOOGLE_PROTOBUF_ARCH_ARM) |
|
||||||
#include <google/protobuf/stubs/atomicops_internals_x86_msvc.h> |
|
||||||
#else |
|
||||||
#error GOOGLE_PROTOBUF_ATOMICOPS_ERROR |
|
||||||
#endif |
|
||||||
|
|
||||||
// Solaris
|
|
||||||
#elif defined(GOOGLE_PROTOBUF_OS_SOLARIS) |
|
||||||
#include <google/protobuf/stubs/atomicops_internals_solaris.h> |
|
||||||
|
|
||||||
// AIX
|
|
||||||
#elif defined(GOOGLE_PROTOBUF_OS_AIX) |
|
||||||
#include <google/protobuf/stubs/atomicops_internals_power.h> |
|
||||||
|
|
||||||
// GCC.
|
|
||||||
#elif defined(__GNUC__) |
|
||||||
#if defined(GOOGLE_PROTOBUF_ARCH_IA32) || defined(GOOGLE_PROTOBUF_ARCH_X64) |
|
||||||
#include <google/protobuf/stubs/atomicops_internals_x86_gcc.h> |
|
||||||
#elif defined(GOOGLE_PROTOBUF_ARCH_ARM) && defined(__linux__) |
|
||||||
#if (((__GNUC__ == 4) && (__GNUC_MINOR__ >= 7)) || (__GNUC__ > 4)) |
|
||||||
#include <google/protobuf/stubs/atomicops_internals_generic_gcc.h> |
|
||||||
#else |
|
||||||
#include <google/protobuf/stubs/atomicops_internals_arm_gcc.h> |
|
||||||
#endif |
|
||||||
#elif defined(GOOGLE_PROTOBUF_ARCH_AARCH64) |
|
||||||
#include <google/protobuf/stubs/atomicops_internals_arm64_gcc.h> |
|
||||||
#elif defined(GOOGLE_PROTOBUF_ARCH_ARM_QNX) |
|
||||||
#include <google/protobuf/stubs/atomicops_internals_arm_qnx.h> |
|
||||||
#elif defined(GOOGLE_PROTOBUF_ARCH_MIPS) || defined(GOOGLE_PROTOBUF_ARCH_MIPS64) |
|
||||||
#include <google/protobuf/stubs/atomicops_internals_mips_gcc.h> |
|
||||||
#elif defined(GOOGLE_PROTOBUF_ARCH_POWER) |
|
||||||
#include <google/protobuf/stubs/atomicops_internals_power.h> |
|
||||||
#elif defined(__native_client__) |
|
||||||
// The static_asserts in the C++11 atomics implementation cause it to fail
|
|
||||||
// with certain compilers, e.g. nvcc on macOS. Don't use elsewhere unless
|
|
||||||
// the TODO in that file is addressed.
|
|
||||||
#include <google/protobuf/stubs/atomicops_internals_generic_c11_atomic.h> |
|
||||||
#elif defined(GOOGLE_PROTOBUF_ARCH_PPC) |
|
||||||
#include <google/protobuf/stubs/atomicops_internals_ppc_gcc.h> |
|
||||||
#elif (((__GNUC__ == 4) && (__GNUC_MINOR__ >= 7)) || (__GNUC__ > 4)) |
|
||||||
#include <google/protobuf/stubs/atomicops_internals_generic_gcc.h> |
|
||||||
#elif defined(__clang__) |
|
||||||
#if __has_extension(c_atomic) |
|
||||||
#include <google/protobuf/stubs/atomicops_internals_generic_gcc.h> |
|
||||||
#else |
|
||||||
#error GOOGLE_PROTOBUF_ATOMICOPS_ERROR |
|
||||||
#endif |
|
||||||
#else |
|
||||||
#error GOOGLE_PROTOBUF_ATOMICOPS_ERROR |
|
||||||
#endif |
|
||||||
|
|
||||||
// Unknown.
|
|
||||||
#else |
|
||||||
#error GOOGLE_PROTOBUF_ATOMICOPS_ERROR |
|
||||||
#endif |
|
||||||
|
|
||||||
#undef GOOGLE_PROTOBUF_ATOMICOPS_ERROR |
|
||||||
|
|
||||||
#endif // GOOGLE_PROTOBUF_NO_THREAD_SAFETY
|
|
||||||
|
|
||||||
#endif // GOOGLE_PROTOBUF_ATOMICOPS_H_
|
|
||||||
Loading…
Reference in new issue