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Diffstat (limited to 'src/google/protobuf/stubs/atomicops.h')
| -rw-r--r-- | src/google/protobuf/stubs/atomicops.h | 242 |
1 files changed, 0 insertions, 242 deletions
diff --git a/src/google/protobuf/stubs/atomicops.h b/src/google/protobuf/stubs/atomicops.h deleted file mode 100644 index 64c838fb..00000000 --- a/src/google/protobuf/stubs/atomicops.h +++ /dev/null @@ -1,242 +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 - typedef int32 Atomic32; - // 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 int64 Atomic64; - #else - 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 - -// On some platforms we need additional declarations to make AtomicWord -// compatible with our other Atomic* types. -#if defined(GOOGLE_PROTOBUF_OS_APPLE) -#include <google/protobuf/stubs/atomicops_internals_atomicword_compat.h> -#endif - -#undef GOOGLE_PROTOBUF_ATOMICOPS_ERROR - -#endif // GOOGLE_PROTOBUF_NO_THREAD_SAFETY - -#endif // GOOGLE_PROTOBUF_ATOMICOPS_H_ |