2d2d7fbc28
-- d6748c733a70cd74ad9b76a0c9cd6b3fe2cecacf by Xiaoyi Zhang <zhangxy@google.com>: Remove empty block, to address alerts reported in https://github.com/abseil/abseil-cpp/issues/368. PiperOrigin-RevId: 265099887 -- 232e2036b5668d6d1296b881f9347756d84541ee by Derek Mauro <dmauro@google.com>: Make the Linux Bazel CI scripts test with the exception mode explicitly set. PiperOrigin-RevId: 265092105 -- 942a40696c2c9b833be03e92d22a6ede7bccb6d4 by Xiaoyi Zhang <zhangxy@google.com>: Import https://github.com/abseil/abseil-cpp/pull/372. Suppress the unused variable warning on GCC, i.e. "-Wunused-variable". PiperOrigin-RevId: 265063925 -- 7ef90796b52cbdc260afc77cf47206f9356471d0 by Xiaoyi Zhang <zhangxy@google.com>: Add quotes to `ABSL_COMMON_INCLUDE_DIRS` since it's a list and may contain a `;`. This addresses https://github.com/abseil/abseil-cpp/issues/373. PiperOrigin-RevId: 265059077 -- 43f3ae742e00b83672ad6c5bc5b17fdb8f9fe6fe by Gennadiy Rozental <rogeeff@google.com>: Internal re-organization PiperOrigin-RevId: 264913945 -- 6a2adf9c08ee1d98cc6b2855a676345c6495294a by Andy Soffer <asoffer@google.com>: Publicly expose type names for uniform interval tags as in, for example, absl::IntervalClosedClosedTag, and add equality comparison operators. PiperOrigin-RevId: 264861162 -- 3c90c6e05fd61d56b419cd2d39dab8f17b8711b8 by Abseil Team <absl-team@google.com>: Add validity check on returned frame pointer. PiperOrigin-RevId: 264858823 -- 2db87e0cfa0c6bea7ba81684b834cb8a73b7d748 by Gennadiy Rozental <rogeeff@google.com>: Add MUST_USE_RESULT attribute to absl::GetFlag to prevent accidental misuse. PiperOrigin-RevId: 264782762 GitOrigin-RevId: d6748c733a70cd74ad9b76a0c9cd6b3fe2cecacf Change-Id: I169e9c5358e4f63000c1255e806d26b8afecf5ff
60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
//
|
|
// Copyright 2019 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.
|
|
|
|
#include "absl/flags/flag.h"
|
|
|
|
#include <cstring>
|
|
|
|
namespace absl {
|
|
|
|
// We want to validate the type mismatch between type definition and
|
|
// declaration. The lock-free implementation does not allow us to do it,
|
|
// so in debug builds we always use the slower implementation, which always
|
|
// validates the type.
|
|
#ifndef NDEBUG
|
|
#define ABSL_FLAGS_ATOMIC_GET(T) \
|
|
T GetFlag(const absl::Flag<T>& flag) { return flag.Get(); }
|
|
#else
|
|
#define ABSL_FLAGS_ATOMIC_GET(T) \
|
|
T GetFlag(const absl::Flag<T>& flag) { \
|
|
T result; \
|
|
if (flag.AtomicGet(&result)) { \
|
|
return result; \
|
|
} \
|
|
return flag.Get(); \
|
|
}
|
|
#endif
|
|
|
|
ABSL_FLAGS_INTERNAL_FOR_EACH_LOCK_FREE(ABSL_FLAGS_ATOMIC_GET)
|
|
|
|
#undef ABSL_FLAGS_ATOMIC_GET
|
|
|
|
// This global nutex protects on-demand construction of flag objects in MSVC
|
|
// builds.
|
|
#if defined(_MSC_VER)
|
|
|
|
namespace flags_internal {
|
|
|
|
ABSL_CONST_INIT static absl::Mutex construction_guard(absl::kConstInit);
|
|
|
|
void LockGlobalConstructionGuard() { construction_guard.Lock(); }
|
|
|
|
void UnlockGlobalConstructionGuard() { construction_guard.Unlock(); }
|
|
|
|
} // namespace flags_internal
|
|
|
|
#endif
|
|
|
|
} // namespace absl
|