Added stopwatch support

This commit is contained in:
gabime 2020-08-29 02:48:43 +03:00
parent cd701761f9
commit 34f3d29d93
2 changed files with 73 additions and 0 deletions

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@ -13,6 +13,7 @@ void rotating_example();
void daily_example();
void async_example();
void binary_example();
void stopwatch_example();
void trace_example();
void multi_sink_example();
void user_defined_example();
@ -71,6 +72,7 @@ int main(int, char *[])
user_defined_example();
err_handler_example();
trace_example();
stopwatch_example();
custom_flags_example();
// Flush all *registered* loggers using a worker thread every 3 seconds.
@ -192,6 +194,16 @@ void trace_example()
SPDLOG_LOGGER_TRACE(logger, "another trace message");
}
// stopwatch example
#include "spdlog/stopwatch.h"
#include <thread>
void stopwatch_example()
{
spdlog::stopwatch sw;
std::this_thread::sleep_for(std::chrono::milliseconds(123));
spdlog::info("Stopwatch: {} seconds", sw);
}
// A logger with multiple sinks (stdout and file) - each with a different format and log level.
void multi_sink_example()
{

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@ -0,0 +1,61 @@
// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
#pragma once
#include <spdlog/fmt/fmt.h>
// Stopwatch support for spdlog (using std::chrono::high_resolution_clock).
// Displays elapsed seconds since construction as double.
//
// Usage:
//
// spdlog::stopwatch sw;
// ...
// spdlog::debug("Elapsed: {} seconds", sw); => "Elapsed 0.005116733 seconds"
// spdlog::info("Elapsed: {:.6} seconds", sw); => "Elapsed 0.005163 seconds"
//
//
// If other units are needed (e.g. millis instead of double), include "fmt/chrono.h" and use "duration_cast<..>(sw.elapsed())":
//
// #include <fmt/chrono.h>
//..
// using std::chrono::duration_cast;
// using std::chrono::milliseconds;
// spdlog::info("Elapsed {}", duration_cast<milliseconds>(sw.elapsed())); => "Elapsed 5ms"
namespace spdlog {
class stopwatch
{
using clock = std::chrono::high_resolution_clock;
std::chrono::time_point<clock> start_tp_;
public:
stopwatch()
: start_tp_{clock::now()}
{}
std::chrono::duration<double> elapsed() const
{
return std::chrono::duration<double>(clock::now() - start_tp_);
}
void reset()
{
start_tp_ = clock ::now();
}
};
} // namespace spdlog
// Support for fmt formatting (e.g. "{:012.9}" or just "{}")
namespace fmt {
template<>
struct formatter<spdlog::stopwatch> : formatter<double>
{
template<typename FormatContext>
auto format(const spdlog::stopwatch &sw, FormatContext &ctx) -> decltype(ctx.out())
{
return formatter<double>::format(sw.elapsed().count(), ctx);
}
};
} // namespace fmt