Implement OS RAM detection

Ref: #3

examples/cpu_memory_physical_available.cpp

@@ -0,0 +1,19 @@
+// infoware - C++ System information Library
+//
+// Written in 2016 by nabijaczleweli <[email protected]> and ThePhD <[email protected]>
+//
+// To the extent possible under law, the author(s) have dedicated all copyright and related
+// and neighboring rights to this software to the public domain worldwide. This software is
+// distributed without any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>
+
+
+#include "infoware/system.hpp"
+#include <iostream>
+
+
+int main() {
+	std::cout << iware::system::memory().physical_available << '\n';
+}

examples/cpu_memory_physical_total.cpp

@@ -0,0 +1,19 @@
+// infoware - C++ System information Library
+//
+// Written in 2016 by nabijaczleweli <[email protected]> and ThePhD <[email protected]>
+//
+// To the extent possible under law, the author(s) have dedicated all copyright and related
+// and neighboring rights to this software to the public domain worldwide. This software is
+// distributed without any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>
+
+
+#include "infoware/system.hpp"
+#include <iostream>
+
+
+int main() {
+	std::cout << iware::system::memory().physical_total << '\n';
+}

examples/cpu_memory_virtual_available.cpp

@@ -0,0 +1,19 @@
+// infoware - C++ System information Library
+//
+// Written in 2016 by nabijaczleweli <[email protected]> and ThePhD <[email protected]>
+//
+// To the extent possible under law, the author(s) have dedicated all copyright and related
+// and neighboring rights to this software to the public domain worldwide. This software is
+// distributed without any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>
+
+
+#include "infoware/system.hpp"
+#include <iostream>
+
+
+int main() {
+	std::cout << iware::system::memory().virtual_available << '\n';
+}

examples/cpu_memory_virtual_total.cpp

@@ -0,0 +1,19 @@
+// infoware - C++ System information Library
+//
+// Written in 2016 by nabijaczleweli <[email protected]> and ThePhD <[email protected]>
+//
+// To the extent possible under law, the author(s) have dedicated all copyright and related
+// and neighboring rights to this software to the public domain worldwide. This software is
+// distributed without any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>
+
+
+#include "infoware/system.hpp"
+#include <iostream>
+
+
+int main() {
+	std::cout << iware::system::memory().virtual_total << '\n';
+}

include/infoware/system.hpp

@@ -13,8 +13,19 @@
 #pragma once
 
 
+#include <cstdint>
+
+
 namespace iware {
 	namespace system {
+		struct memory_t {
+			std::size_t physical_available;
+			std::size_t physical_total;
+			std::size_t virtual_available;
+			std::size_t virtual_total;
+		};
+
+
 		/// Get amount of connected mice.
 		unsigned int mouse_amount() noexcept;
 
@@ -27,5 +38,8 @@ namespace iware {
 		///
 		/// Always returns 0 on Linuxish kernels, as it can not be detected there.
 		unsigned int other_HID_amount() noexcept;
+
+		/// Get RAM statistics.
+		memory_t memory() noexcept;
 	}
 }

src/system/memory/non-windows.cpp

@@ -0,0 +1,46 @@
+// infoware - C++ System information Library
+//
+// Written in 2016 by nabijaczleweli <[email protected]> and ThePhD <[email protected]>
+//
+// To the extent possible under law, the author(s) have dedicated all copyright and related
+// and neighboring rights to this software to the public domain worldwide. This software is
+// distributed without any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>
+
+
+#ifndef _WIN32
+
+
+#include "infoware/system.hpp"
+#include <fstream>
+#include <string>
+
+
+iware::system::memory_t iware::system::memory() noexcept {
+	std::ifstream meminfo("/proc/meminfo");
+
+	if(!meminfo.is_open() || !meminfo)
+		return ret;
+
+	iware::system::memory_t ret;
+	for(std::string line; std::getline(meminfo, line);) {
+		const auto colon_id = line.find_first_of(':');
+		const auto value    = std::strtoul(line.c_str() + colon_id + 1, nullptr) * 1024;
+
+		if(line.find("MemTotal") == 0)
+			ret.physical_total = value;
+		else if(line.find("MemAvailable") == 0)
+			ret.physical_available = value;
+		else if(line.find("VmallocTotal") == 0)
+			ret.virtual_total = value;
+		else if(line.find("VmallocUsed") == 0)
+			ret.virtual_available = ret.virtual_total - value;
+	}
+
+	return ret;
+}
+
+
+#endif

src/system/memory/windows.cpp

@@ -0,0 +1,36 @@
+// infoware - C++ System information Library
+//
+// Written in 2016 by nabijaczleweli <[email protected]> and ThePhD <[email protected]>
+//
+// To the extent possible under law, the author(s) have dedicated all copyright and related
+// and neighboring rights to this software to the public domain worldwide. This software is
+// distributed without any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>
+
+
+#ifdef _WIN32
+
+
+#include "infoware/system.hpp"
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+
+iware::system::memory_t iware::system::memory() noexcept {
+	MEMORYSTATUSEX mem;
+	mem.dwLength = sizeof(mem);
+	if(!GlobalMemoryStatusEx(&mem))
+		return {};
+
+	return {
+		mem.ullTotalPhys,
+		mem.ullAvailPhys,
+		mem.ullTotalVirtual,
+		mem.ullAvailVirtual,
+	};
+}
+
+
+#endif