74 lines
2.0 KiB
C++
74 lines
2.0 KiB
C++
/*
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* Copyright 2017 WebAssembly Community Group participants
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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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#ifndef WABT_TRACING_H_
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#define WABT_TRACING_H_
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// Provides a simple tracing class that automatically generates enter/exit
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// messages using the scope of the instance.
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//
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// It also assumes that this file is only included in .cc files.
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// Immediately before the inclusion of this file, there is a define of
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// for WABT_TRACING, defining whether tracing should be compiled in for
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// that source file.
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#ifndef WABT_TRACING
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#define WABT_TRACING 0
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#endif
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#include "wabt/common.h"
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namespace wabt {
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#if WABT_TRACING
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// Scoped class that automatically prints enter("->") and exit("<-")
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// lines, indented by trace level.
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struct TraceScope {
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WABT_DISALLOW_COPY_AND_ASSIGN(TraceScope);
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TraceScope() = delete;
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TraceScope(const char* method);
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template <typename... Args>
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TraceScope(const char* method, const char* format, Args&&... args)
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: method_(method) {
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PrintEnter(method);
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fprintf(stderr, format, std::forward<Args>(args)...);
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PrintNewline();
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}
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~TraceScope();
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private:
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const char* method_;
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void PrintEnter(const char* method);
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void PrintNewline();
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};
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#define WABT_TRACE(method_name) TraceScope _func_(#method_name)
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#define WABT_TRACE_ARGS(method_name, format, ...) \
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TraceScope _func_(#method_name, format, __VA_ARGS__)
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#else
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#define WABT_TRACE(method)
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#define WABT_TRACE_ARGS(method_name, format, ...)
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#endif
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} // end namespace wabt
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#endif // WABT_TRACING_H_
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