#ifdef __linux__

#include "SystemCalls.h"

#include <sys/sysinfo.h>
#include <unistd.h>
#include <dlfcn.h>

#include <exception>
#include <stdexcept>

int System::getCountCPU()
{
	int num_cores = sysconf(_SC_NPROCESSORS_ONLN);
	if(num_cores <= 0)
		throw std::runtime_error("Fail get number of cores");

	return num_cores;
}

unsigned long long System::getMemorySize()
{
	struct sysinfo info{};
       	if(sysinfo(&info) == -1)
		std::runtime_error("Fail get system info");
	return info.totalram;
}

void* System::InitModule(const char* ModuleName, CoreInstance& core)
{
	std::string fileName = "./lib";
	fileName += ModuleName;
	fileName += ".so";

	void* handler = dlopen(fileName.c_str(), RTLD_NOW);
	if(handler == nullptr)
		throw std::runtime_error("Module not found");

	void(*init)(CoreInstance&) = reinterpret_cast<void(*)(CoreInstance&)>(dlsym(handler, "InitModule"));
	if(init == nullptr)
		throw std::runtime_error("Module not contains InitModule");
	init(core);

	return handler;
}

void System::StartModule(void* handler)
{
	void(*start)() = reinterpret_cast<void(*)()>(dlsym(handler, "StartModule"));
	if(start == nullptr)
		throw std::runtime_error("Module not contins StartModule");
	start();
}

void System::StopModule(void* handler)
{
	void(*stop)() = reinterpret_cast<void(*)()>(dlsym(handler, "StopModule"));
	if(stop == nullptr)
		std::runtime_error("Module mot contins StopModule");
	stop();
	dlclose(handler);
}

void System::QuitModule(void* handler)
{
	void(*quit)() = reinterpret_cast<void(*)()>(dlsym(handler, "QuitModule"));
	if(quit == nullptr)
		throw std::runtime_error("Module not contains QuitModule");
	quit();
	dlclose(handler);
}

#endif