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/*
Userspace Virtual Filesystem
Copyright (C) 2015 Sebastian Herbord. All rights reserved.
This file is part of usvfs.
usvfs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
usvfs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with usvfs. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <spdlog/details/null_mutex.h>
#include <spdlog/sinks/base_sink.h>
#include "logging.h"
#include "shared_memory.h"
#include "windows_sane.h"
typedef boost::interprocess::message_queue_t<usvfs::shared::VoidPointerT>
message_queue_interop;
namespace usvfs::sinks
{
class shm_sink : public spdlog::sinks::base_sink<spdlog::details::null_mutex>
{
public:
shm_sink(const char* queueName);
protected:
void sink_it_(const spdlog::details::log_msg& msg) override;
void output(spdlog::level::level_enum lev, const std::string& message);
void flush_() override;
private:
message_queue_interop m_LogQueue;
std::atomic<int> m_DroppedMessages;
};
} // namespace usvfs::sinks
class SHMLogger
{
public:
static const size_t MESSAGE_COUNT = 1024;
static const size_t MESSAGE_SIZE = 512;
static SHMLogger& create(const char* instanceName);
static SHMLogger& open(const char* instanceName);
static void free();
static bool isInstantiated() { return s_Instance != nullptr; }
static inline SHMLogger& instance()
{
if (s_Instance == nullptr) {
throw std::runtime_error("shm logger not instantiated");
}
return *s_Instance;
}
void log(LogLevel logLevel, const std::string& message);
bool tryGet(char* buffer, size_t bufferSize);
void get(char* buffer, size_t bufferSize);
private:
struct owner_t
{};
static owner_t owner;
struct client_t
{};
static client_t client;
private:
SHMLogger(owner_t, const std::string& instanceName);
SHMLogger(client_t, const std::string& instanceName);
SHMLogger(const SHMLogger&) = delete;
SHMLogger& operator=(const SHMLogger&) = delete;
~SHMLogger();
private:
static SHMLogger* s_Instance;
message_queue_interop m_LogQueue;
std::string m_SHMName;
std::string m_LockName;
std::string m_QueueName;
std::atomic<int> m_DroppedMessages;
};
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