msvc_sink.h
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// Copyright(c) 2016 Alexander Dalshov.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
#pragma once
#if defined(_WIN32)
#include <spdlog/details/null_mutex.h>
#include <spdlog/sinks/base_sink.h>
#include <mutex>
#include <string>
// Avoid including windows.h (https://stackoverflow.com/a/30741042)
extern "C" __declspec(dllimport) void __stdcall OutputDebugStringA(const char *lpOutputString);
namespace spdlog {
namespace sinks {
/*
* MSVC sink (logging using OutputDebugStringA)
*/
template<typename Mutex>
class msvc_sink : public base_sink<Mutex>
{
public:
msvc_sink() = default;
protected:
void sink_it_(const details::log_msg &msg) override
{
memory_buf_t formatted;
base_sink<Mutex>::formatter_->format(msg, formatted);
OutputDebugStringA(fmt::to_string(formatted).c_str());
}
void flush_() override {}
};
using msvc_sink_mt = msvc_sink<std::mutex>;
using msvc_sink_st = msvc_sink<details::null_mutex>;
using windebug_sink_mt = msvc_sink_mt;
using windebug_sink_st = msvc_sink_st;
} // namespace sinks
} // namespace spdlog
#endif