Add Posix hardware infos support.

Former-commit-id: adbdeb13349dfea4d962f0df6668f51937803fc4

src/Nazara/Core/Posix/HardwareInfoImpl.cpp

@@ -0,0 +1,81 @@
+// Copyright (C) 2012 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Core/Posix/HardwareInfoImpl.hpp>
+#include <Nazara/Core/Error.hpp>
+
+#ifdef NAZARA_COMPILER_MSVC
+#include <intrin.h>
+#endif
+
+#include <Nazara/Core/Debug.hpp>
+
+void NzHardwareInfoImpl::Cpuid(nzUInt32 code, nzUInt32 result[4])
+{
+	#if defined(NAZARA_COMPILER_MSVC)
+	__cpuid(reinterpret_cast<int*>(result), static_cast<int>(code)); // Visual propose une fonction intrinsèque pour le cpuid
+	#elif defined(NAZARA_COMPILER_CLANG) || defined(NAZARA_COMPILER_GCC) || defined(NAZARA_COMPILER_INTEL)
+	// Source: http://stackoverflow.com/questions/1666093/cpuid-implementations-in-c
+	asm volatile ("cpuid" // Besoin d'être volatile ?
+				  : "=a" (result[0]), "=b" (result[1]), "=c" (result[2]), "=d" (result[3]) // output
+                  : "a" (code), "c" (0));                                                  // input
+	#else
+	NazaraInternalError("Cpuid has been called although it is not supported");
+	#endif
+}
+
+unsigned int NzHardwareInfoImpl::GetProcessorCount()
+{
+	// Plus simple (et plus portable) que de passer par le CPUID
+	return sysconf(_SC_NPROCESSORS_CONF);
+}
+
+bool NzHardwareInfoImpl::IsCpuidSupported()
+{
+	#ifdef NAZARA_PLATFORM_x64
+	return true; // Toujours supporté sur un processeur 64 bits
+	#else
+		#if defined(NAZARA_COMPILER_MSVC)
+		int supported;
+		__asm
+		{
+			pushfd
+			pop  eax
+			mov  ecx, eax
+			xor  eax, 0x200000
+			push eax
+			popfd
+			pushfd
+			pop  eax
+			xor  eax, ecx
+			mov  supported, eax
+			push ecx
+			popfd
+		};
+
+		return supported != 0;
+		#elif defined(NAZARA_COMPILER_CLANG) || defined(NAZARA_COMPILER_GCC) || defined(NAZARA_COMPILER_INTEL)
+		int supported;
+		asm volatile ("	pushfl\n"
+					  "	pop %%eax\n"
+					  "	mov %%eax, %%ecx\n"
+					  "	xor $0x200000, %%eax\n"
+					  "	push %%eax\n"
+					  "	popfl\n"
+					  "	pushfl\n"
+					  "	pop %%eax\n"
+					  "	xor %%ecx, %%eax\n"
+					  "	mov %%eax, %0\n"
+					  "	push %%ecx\n"
+					  "	popfl"
+					  : "=m" (supported)         // output
+					  :                          // input
+					  : "eax", "ecx", "memory"); // clobbered register
+
+		return supported != 0;
+		#else
+		return false;
+		#endif
+	#endif
+}

src/Nazara/Core/Posix/HardwareInfoImpl.hpp

@@ -0,0 +1,21 @@
+// Copyright (C) 2012 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_HARDWAREINFOIMPL_POSIX_HPP
+#define NAZARA_HARDWAREINFOIMPL_POSIX_HPP
+
+#include <Nazara/Prerequesites.hpp>
+#include <unistd.h>
+
+class NzHardwareInfoImpl
+{
+	public:
+		static void Cpuid(nzUInt32 code, nzUInt32 result[4]);
+		static unsigned int GetProcessorCount();
+		static bool IsCpuidSupported();
+};
+
+#endif // NAZARA_HARDWAREINFOIMPL_POSIX_HPP