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