File size: 1,629 Bytes
8ae5fc5 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 | #ifndef BENCHMARK_LOG_H_
#define BENCHMARK_LOG_H_
#include <iostream>
#include <ostream>
#include "benchmark/benchmark.h"
namespace benchmark {
namespace internal {
typedef std::basic_ostream<char>&(EndLType)(std::basic_ostream<char>&);
class LogType {
friend LogType& GetNullLogInstance();
friend LogType& GetErrorLogInstance();
// FIXME: Add locking to output.
template <class Tp>
friend LogType& operator<<(LogType&, Tp const&);
friend LogType& operator<<(LogType&, EndLType*);
private:
LogType(std::ostream* out) : out_(out) {}
std::ostream* out_;
BENCHMARK_DISALLOW_COPY_AND_ASSIGN(LogType);
};
template <class Tp>
LogType& operator<<(LogType& log, Tp const& value) {
if (log.out_) {
*log.out_ << value;
}
return log;
}
inline LogType& operator<<(LogType& log, EndLType* m) {
if (log.out_) {
*log.out_ << m;
}
return log;
}
inline int& LogLevel() {
static int log_level = 0;
return log_level;
}
inline LogType& GetNullLogInstance() {
static LogType log(nullptr);
return log;
}
inline LogType& GetErrorLogInstance() {
static LogType log(&std::clog);
return log;
}
inline LogType& GetLogInstanceForLevel(int level) {
if (level <= LogLevel()) {
return GetErrorLogInstance();
}
return GetNullLogInstance();
}
} // end namespace internal
} // end namespace benchmark
// clang-format off
#define VLOG(x) \
(::benchmark::internal::GetLogInstanceForLevel(x) << "-- LOG(" << x << "):" \
" ")
// clang-format on
#endif
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