mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-15 07:06:11 -04:00
Alexey Polyudov
ce4807935e
Signed-off-by: Alexey Polyudov <apolyudov@google.com> Change-Id: Ic2bdb234e89f3c5860d1b483dd4bce689f13d057
80 lines
3.0 KiB
C++
80 lines
3.0 KiB
C++
// Copyright 2020 Google LLC
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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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#ifndef PLATFORM_BASE_LOGGING_H_
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#define PLATFORM_BASE_LOGGING_H_
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#include "platform/api/log_message.h"
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#include "platform/api/platform.h"
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namespace location {
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namespace nearby {
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// This class is used to explicitly ignore values in the conditional
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// logging macros. This avoids compiler warnings like "value computed
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// is not used" and "statement has no effect".
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class LogMessageVoidify {
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public:
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LogMessageVoidify() = default;
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// This has to be an operator with a precedence lower than << but
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// higher than ?:
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void operator&(std::ostream&) {}
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};
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} // namespace nearby
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} // namespace location
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// Severity enum conversion
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#define NEARBY_SEVERITY_INFO location::nearby::api::LogMessage::Severity::kInfo
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#define NEARBY_SEVERITY_WARNING \
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location::nearby::api::LogMessage::Severity::kWarning
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#define NEARBY_SEVERITY_ERROR \
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location::nearby::api::LogMessage::Severity::kError
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#define NEARBY_SEVERITY_FATAL \
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location::nearby::api::LogMessage::Severity::kFatal
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#if defined(_WIN32)
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// wingdi.h defines ERROR to be 0. When we call LOG(ERROR), it gets substituted
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// with 0, and it expands to NEARBY_SEVERITY_0. To allow us to keep using this
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// syntax, we define this macro to do the same thing as NEARBY_SEVERITY_ERROR.
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#define NEARBY_SEVERITY_0 location::nearby::api::LogMessage::Severity::kError
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#endif // defined(_WIN32)
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#define NEARBY_SEVERITY(severity) NEARBY_SEVERITY_##severity
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// Log enabling
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#define NEARBY_LOG_IS_ON(severity) \
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location::nearby::api::LogMessage::ShouldCreateLogMessage( \
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NEARBY_SEVERITY(severity))
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#define NEARBY_LOG_SET_SEVERITY(severity) \
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location::nearby::api::LogMessage::SetMinLogSeverity( \
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NEARBY_SEVERITY(severity))
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// Log message creation
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#define NEARBY_LOG_MESSAGE(severity) \
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location::nearby::api::ImplementationPlatform::CreateLogMessage( \
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__FILE__, __LINE__, NEARBY_SEVERITY(severity))
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// Public APIs
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// The stream statement must come last or otherwise it won't compile.
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#define NEARBY_LOGS(severity) \
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!(NEARBY_LOG_IS_ON(severity)) ? (void)0 \
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: location::nearby::LogMessageVoidify() & \
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NEARBY_LOG_MESSAGE(severity)->Stream()
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#define NEARBY_LOG(severity, ...) \
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NEARBY_LOG_IS_ON(severity) \
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? NEARBY_LOG_MESSAGE(severity)->Print(__VA_ARGS__) : (void)0
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#endif // PLATFORM_BASE_LOGGING_H_
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