52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
// Copyright 2017 The Abseil Authors.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef ABSL_BASE_INTERNAL_PER_THREAD_TLS_H_
|
|
#define ABSL_BASE_INTERNAL_PER_THREAD_TLS_H_
|
|
|
|
// This header defines two macros:
|
|
//
|
|
// If the platform supports thread-local storage:
|
|
//
|
|
// * ABSL_PER_THREAD_TLS_KEYWORD is the C keyword needed to declare a
|
|
// thread-local variable
|
|
// * ABSL_PER_THREAD_TLS is 1
|
|
//
|
|
// Otherwise:
|
|
//
|
|
// * ABSL_PER_THREAD_TLS_KEYWORD is empty
|
|
// * ABSL_PER_THREAD_TLS is 0
|
|
//
|
|
// Microsoft C supports thread-local storage.
|
|
// GCC supports it if the appropriate version of glibc is available,
|
|
// which the programmer can indicate by defining ABSL_HAVE_TLS
|
|
|
|
#include "absl/base/port.h" // For ABSL_HAVE_TLS
|
|
|
|
#if defined(ABSL_PER_THREAD_TLS)
|
|
#error ABSL_PER_THREAD_TLS cannot be directly set
|
|
#elif defined(ABSL_PER_THREAD_TLS_KEYWORD)
|
|
#error ABSL_PER_THREAD_TLS_KEYWORD cannot be directly set
|
|
#elif defined(ABSL_HAVE_TLS)
|
|
#define ABSL_PER_THREAD_TLS_KEYWORD __thread
|
|
#define ABSL_PER_THREAD_TLS 1
|
|
#elif defined(_MSC_VER)
|
|
#define ABSL_PER_THREAD_TLS_KEYWORD __declspec(thread)
|
|
#define ABSL_PER_THREAD_TLS 1
|
|
#else
|
|
#define ABSL_PER_THREAD_TLS_KEYWORD
|
|
#define ABSL_PER_THREAD_TLS 0
|
|
#endif
|
|
|
|
#endif // ABSL_BASE_INTERNAL_PER_THREAD_TLS_H_
|