72 lines
2.9 KiB
C++
72 lines
2.9 KiB
C++
/*
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* Copyright 2016-present Facebook, Inc.
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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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* http://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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*/
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#pragma once
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#include <folly/portability/Config.h>
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#if !FOLLY_HAVE_LIBGFLAGS
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// glog/logging.h is dependent on this implementation detail
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// being defined otherwise it undefines all of this -_-....
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//
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// Also, this is deliberately expanded such that places using
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// it directly break loudly. (C will break louder than C++, but oh well)
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#define DECLARE_VARIABLE() \
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static_assert(false, "You shouldn't be using GFlags internals.");
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#define FOLLY_DECLARE_FLAG(_type, _shortType, _name) \
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namespace fL##_shortType { \
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extern _type FLAGS_##_name; \
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} \
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using fL##_shortType::FLAGS_##_name
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#define DECLARE_bool(_name) FOLLY_DECLARE_FLAG(bool, B, _name)
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#define DECLARE_double(_name) FOLLY_DECLARE_FLAG(double, D, _name)
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#define DECLARE_int32(_name) FOLLY_DECLARE_FLAG(int, I, _name)
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#define DECLARE_int64(_name) FOLLY_DECLARE_FLAG(long long, I64, _name)
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#define DECLARE_uint32(_name) FOLLY_DECLARE_FLAG(unsigned long, U32, _name)
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#define DECLARE_uint64(_name) FOLLY_DECLARE_FLAG(unsigned long long, U64, _name)
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#define DECLARE_string(_name) FOLLY_DECLARE_FLAG(std::string, S, _name)
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#define FOLLY_DEFINE_FLAG(_type, _shortType, _name, _default) \
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namespace fL##_shortType { \
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_type FLAGS_##_name = _default; \
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} \
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using fL##_shortType::FLAGS_##_name
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#define DEFINE_bool(_name, _default, _description) \
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FOLLY_DEFINE_FLAG(bool, B, _name, _default)
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#define DEFINE_double(_name, _default, _description) \
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FOLLY_DEFINE_FLAG(double, D, _name, _default)
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#define DEFINE_int32(_name, _default, _description) \
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FOLLY_DEFINE_FLAG(int, I, _name, _default)
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#define DEFINE_int64(_name, _default, _description) \
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FOLLY_DEFINE_FLAG(long long, I64, _name, _default)
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#define DEFINE_uint32(_name, _default, _description) \
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FOLLY_DEFINE_FLAG(unsigned long, U32, _name, _default)
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#define DEFINE_uint64(_name, _default, _description) \
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FOLLY_DEFINE_FLAG(unsigned long long, U64, _name, _default)
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#define DEFINE_string(_name, _default, _description) \
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FOLLY_DEFINE_FLAG(std::string, S, _name, _default)
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namespace google {
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class FlagSaver {};
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} // namespace google
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#else
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#include <gflags/gflags.h>
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#endif
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