38 lines
1.1 KiB
C++
38 lines
1.1 KiB
C++
//
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// Copyright 2019 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "absl/flags/flag.h"
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#include "absl/base/config.h"
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namespace absl {
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ABSL_NAMESPACE_BEGIN
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// This global mutex protects on-demand construction of flag objects in MSVC
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// builds.
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#if defined(_MSC_VER) && !defined(__clang__)
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namespace flags_internal {
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ABSL_CONST_INIT static absl::Mutex construction_guard(absl::kConstInit);
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absl::Mutex* GetGlobalConstructionGuard() { return &construction_guard; }
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} // namespace flags_internal
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#endif
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ABSL_NAMESPACE_END
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} // namespace absl
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