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Initial revision
This was SVN commit r5.
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janwas
Executable
+301
@@ -0,0 +1,301 @@
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// system detect
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//
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// Copyright (c) 2003 Jan Wassenberg
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// Contact info:
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// Jan.Wassenberg@stud.uni-karlsruhe.de
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// http://www.stud.uni-karlsruhe.de/~urkt/
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// things missing in POSIX and SDL :P
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#include <cstdio>
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#include <cstring>
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#ifdef _WIN32
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#include "win.h"
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#endif
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#include "detect.h"
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#include "time.h"
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#include "ogl.h"
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#include "wsdl.h"
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// useful for choosing a video mode. not called by detect().
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// currently not implemented for non-Win32 systems (returns 800x600).
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void get_cur_resolution(int& xres, int& yres)
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{
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// guess
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xres = 800; yres = 600;
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#ifdef _WIN32
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static DEVMODE dm;
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dm.dmSize = sizeof(dm);
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EnumDisplaySettings(0, ENUM_CURRENT_SETTINGS, &dm);
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xres = dm.dmPelsWidth;
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yres = dm.dmPelsHeight;
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#endif
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}
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unsigned long tot_mem = 0;
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unsigned long avl_mem = 0;
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void get_mem_status()
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{
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// Win32
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#ifdef _WIN32
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MEMORYSTATUS ms;
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GlobalMemoryStatus(&ms);
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tot_mem = round_up(ms.dwTotalPhys, 1*MB);
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// fixes results for my machine - off by 528 KB. why?!
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avl_mem = ms.dwAvailPhys;
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// Sys V derived (GNU/Linux, Solaris)
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#elif defined(_SC_PAGESIZE) && defined(_SC_AVPHYS_PAGES)
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long page_size = sysconf(_SC_PAGESIZE);
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tot_mem = sysconf(_SC_PHYS_PAGES ) * page_size;
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avl_mem = sysconf(_SC_AVPHYS_PAGES) * page_size;
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// BSD / Mac OS X
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#elif HAVE_SYSCTL && defined(HW_PHYSMEM)
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size_t len = sizeof(tot_mem);
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int mib[2] = { CTL_HW, HW_PHYSMEM };
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sysctl(mib, 2, &tot_mem, &len, 0, 0);
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mib[1] = HW_USERMEM;
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sysctl(mib, 2, &avl_mem, &len, 0, 0);
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#endif
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}
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char gfx_card[512] = ""; // = D3D8 MAX_DEVICE_IDENTIFIER_STRING
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#ifdef D3D8
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#include <d3d8.h>
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#ifdef _MSC_VER
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#pragma comment(lib, "d3d8.lib")
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#endif
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#endif
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// no-op on non-Win32 systems until OpenGL is initialized.
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void get_gfx_card()
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{
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// already successfully detected
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if(gfx_card[0] != 0)
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return;
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#ifdef D3D8
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IDirect3D8* d3d = Direct3DCreate8(D3D_SDK_VERSION);
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D3DADAPTER_IDENTIFIER8 id;
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d3d->GetAdapterIdentifier(D3DADAPTER_DEFAULT, D3DENUM_NO_WHQL_LEVEL, &id);
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d3d->Release();
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strcpy(gfx_card, id.Description);
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#else
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char* v = (char*)glGetString(GL_VENDOR);
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if(!v) // OpenGL probably not initialized yet
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return;
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strncpy(gfx_card, v, sizeof(gfx_card));
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if(!strcmp(gfx_card, "ATI Technologies Inc."))
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gfx_card[3] = 0;
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if(!strcmp(gfx_card, "NVIDIA Corporation"))
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gfx_card[6] = 0;
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strcat(gfx_card, (char*)glGetString(GL_RENDERER));
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#endif
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}
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//
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// CPU
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//
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char cpu_type[49] = "unknown CPU"; // processor brand string is 48 chars
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double cpu_freq = 0.f;
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long cpu_caps = 0;
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long cpu_ext_caps = 0;
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// -1 if detect not yet called, or cannot be determined
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int cpus = -1;
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int is_notebook = -1;
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#ifdef _M_IX86
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int has_tsc = -1;
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inline u64 rdtsc()
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{
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u64 c;
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__asm
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{
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cpuid
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rdtsc
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mov dword ptr [c], eax
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mov dword ptr [c+4], edx
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}
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// 64 bit values are returned in edx:eax, but we do it the safe way
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return c;
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}
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#endif
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static void get_cpu_info()
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{
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#ifdef _M_IX86
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static char cpu_vendor[13];
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int family, model;
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__asm
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{
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; make sure CPUID is supported (size opt.)
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pushfd
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or byte ptr [esp+2], 32
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popfd
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pushfd
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pop eax
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shr eax, 22 ; bit 21 toggled?
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jnc no_cpuid
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; get vendor string
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xor eax, eax
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cpuid
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mov dword ptr [cpu_vendor], ebx
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mov dword ptr [cpu_vendor+4], edx
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mov dword ptr [cpu_vendor+8], ecx
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; (already 0 terminated)
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; get CPU signature and std feature bits
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mov eax, 1
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cpuid
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mov [cpu_caps], edx
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mov edx, eax
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shr edx, 4
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and edx, 0x0f
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mov [model], edx
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shr eax, 8
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and eax, 0x0f
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mov [family], eax
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; make sure CPUID ext functions are supported
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mov eax, 0x80000000
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cpuid
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cmp eax, 0x80000000
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jbe no_brand_str
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; get CPU brand string (>= Athlon XP, P4)
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mov edi, offset cpu_type
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mov esi, -2 ; loop counter: -2 to 0
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$1: lea eax, [0x80000004+esi]
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cpuid
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stosd
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xchg eax, ebx
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stosd
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xchg eax, ecx
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stosd
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xchg eax, edx
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stosd
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inc esi
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jle $1
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; already 0 terminated
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; get extended feature flags
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mov eax, 0x80000001
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cpuid
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mov [cpu_ext_caps], edx
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}
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// strip (tm) from Athlon string
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if(!strncmp(cpu_type, "AMD Athlon(tm)", 14))
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memmove(cpu_type+10, cpu_type+14, 34);
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// fixup Intel's as well
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int a, b; // not needed, but sscanf returns # fields actually stored
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if(sscanf(cpu_type, "Intel ® Pentium 4 CPU %d.%d GHz", &a, &b) == 2)
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strcpy(cpu_type, "Intel Pentium 4");
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goto have_brand_str;
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no_brand_str:
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// AMD
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if(!strcmp(cpu_vendor, "AuthenticAMD"))
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{
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if(family == 6)
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strcpy(cpu_type, (model == 3)? "AMD Duron" : "AMD Athlon");
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}
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// Intel
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else if(!strcmp(cpu_vendor, "GenuineIntel"))
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{
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if(family == 6 && model >= 7)
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strcpy(cpu_type, "Intel Pentium III / Celeron");
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}
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have_brand_str:
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// calc CPU freq (count clocks in 50 ms)
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if(cpu_caps & TSC)
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{
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u64 clocks1 = rdtsc();
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// .. wait at at least 50 ms
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double t1 = get_time();
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double t2;
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do
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t2 = get_time();
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while(t2 < t1 + 50e-3);
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u64 clocks2 = rdtsc();
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// .. freq = (clocks / 50 [ms]) / 50 [ms] * 1000
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// cpuid/rdtsc overhead is negligible
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cpu_freq = (__int64)(clocks2-clocks1) / (t2-t1);
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// VC6 can't convert u64 -> double, and we don't need full range
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}
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// don't bother with a WAG timing loop
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no_cpuid:
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#endif // #ifdef _M_IX86
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#ifdef _WIN32
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HW_PROFILE_INFO hi;
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GetCurrentHwProfile(&hi);
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is_notebook = !(hi.dwDockInfo & DOCKINFO_DOCKED) ^
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!(hi.dwDockInfo & DOCKINFO_UNDOCKED);
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// both flags set <==> this is a desktop machine.
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// both clear is unspecified; we assume it's not a notebook.
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SYSTEM_INFO si;
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GetSystemInfo(&si);
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cpus = si.dwNumberOfProcessors;
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#endif
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}
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void detect()
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{
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get_mem_status();
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get_gfx_card();
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get_cpu_info();
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}
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